Why Shakespeare Included The Porters scene in a Production Of Macbeth Essay Example for Free

Why Shakespeare Included The Porters scene in a Production Of Macbeth Essay Macbeth is a play written by William Shakespeare, he was born in the 17th century, William Shakespeare wrote over thirty-seven plays and possibly had a hand in others, he also wrote several poems. He lived in an age when printing was not commonplace, and yet most of his works were published either after his death or without his authority. Shakespeare often wrote his plays about the lives of great people, but very little about Shakespeare himself is known. As you will see in Macbeth this is probably his most striking play as it is obviously written for a particular king at a particular time in history. Therefore studying Macbeth we have extra information, this perhaps gives us a broader insight into the art and mind of William Shakespeare. William Shakespeare came from Yeomans stock, his fathers name was John Shakespeare and his mothers name was Mary Shakespeare. Shakespeare himself was almost certainly educated in the local grammar school. He married Anne Hathaway she was eighteen years senior to him in 1582, they had their first child, Susanna in 1583. They had two other children twins, Judith and Hannet born in 1583. Shakespeare retired back to live in Stratford near the later parts of his life, his son Hannet had died by that time and all his grandchildren also died for unknown reasons. He died in 1616. Macbeth is often described as Shakespeare greatest play ever; it has any different contexts to the play. Still viewed by millions across the world in theatres. Macbeth was written sometime between 1603 and 1606, this coincided with the accession of James the Sixth of Scotland to the English throne, as James the First of England. There are many issues in the play that proves James was primarily in mind whilst writing the play. Firstly it pays homage to the interests and expertise of James: James was fascinated by witchcraft and one of the main issues in the play is that of supernatural powers, also the Kings Evil is a major issue in the play and that was of great interest to James. Secondly it compliments James by making his ancestor, Banquo a hero in the play. As Duncan puts it, Noble Banquo. Despite also receiving supernatural solicitations from the witches he doesnt fall into evil unlike Macbeth. But in point of fact, Banquo historically was an accomplice in the murder of Duncan. A reminder of this presumably would not have pleased James. Thirdly the play explores the issue of kingship and loyalty. These were a profound interest to James who clearly in life avoided an assassination attempt. The divine rights of Kings is essential to the play, The Divine Rights Of Kings meant that because god appointed the king, the king was not answerable to the people or to the parliament, what this is, it means the king has overall power over his people. The play is also intimately related to the topical events of the Gunpowder plot of 1605 and the subsequent trials, of the conspirators. Shakespeare from this picks up the theme of, equivocation. this is related to the wider theme of appearances. It was lady Macbeth who advises Macbeth to, look like the innocent flower, but be the serpent under it. The porter is a marvellous lowlife type of character- drunk, obscene, garrulous, and could be considered as one of Shakespeares, best characters of comedy. The bleak Prathieban Sathanathan Mrs. Collins Original Writing intensity of the previous scene gives way to a brief comic interlude- this is where the porter makes his introduction in the play, after the murder of Duncan has been accomplished. Although the porter is crude and rough his introduction benefits the play in a number of ways. The continuation of physical knocking reminds us that we are still in the world where the Macbeths have jus committed murder. There are many practical reasons as to why Shakespeare has included, the porters scene, into this production of Macbeth. The most obvious are being, it gives the actors playing Macbeth and lady Macbeth time to get of the stage, wash the blood off and change their clothes. Shakespeare also had a lot of comic actors in his company, and many of them needed small parts and they were meant to be popular with the audiences. Shakespeare may have been trying to please King James, as the porter refers to the gunpowder plot. Faith, heres an equivocator that could swear in both the scales against either scale, who committed treason enough for gods sake, yet could not equivocate to heaven. an equivocator is someone who does not actually lie, but does not tell the whole truth either. This means he could balance up the scales of justice, by arguing on both sides and prevent someone being convicted, but he could not argue his way into heaven. The point in the play in which Shakespeare has decided to include the scene may be rather comical to some people, as he has brought in this scene straight after a scene which mustve horrified his audience. He may have brought in this comical scene to restrain the audience from laughing in the wrong places, as there is hardly any other comedy present in the play apart from this particular scene. Shakespeare may have used this distinctive scene as a, laughter conductor, so they can be convulsed with laughter in this particular scene, rather than laughing at any other point in the play. By allowing the audience to laugh straight after, the horror of seeing the blood- splattered Macbeths they will be more able to endorse the further bloodshed and horror in the scenes that follow. Earlier in the play, lady Macbeth calls upon; murdering ministers this would immediately cause the audience to make instant comparisons with the Macbeths caste castle and hell. The porter, would also remind Shakespeares audience of the traditional figure of the porter of Hell Gate in medieval plays, this would then make the play universal and this would cause the audience to think that it is about everyone, not just the Macbeths. The porter makes a variety of speeches in this scene; some of these are of the main themes in the play these include, equivocation, damnation and the supernatural. Faith, heres an equivocator that could swear in both scaled against either scale; who committed treason enough for gods sake, yet could not equivocate to heave: O! an equivocator is someone who does not actually lie but does not tell the whole truth either. They hold up and balance the scales of justice, by arguing on both sides, and prevent someone from being convicted; but they could not argue their way into heaven. This topical reference made by the porter to the Gunpowder plot and equivocators would remind the audience about the horror of attempting to kill a king. This would also please king James, as Shakespeare obviously had James primarily in mind whilst writing the play. Shakespeare also includes a reference to, Faith, heres an English tailor come hither for stealing out of a French hose: come in, tailor; here you may roast your goose. The porter is implying that tailors were known for making a profit by using less cloth than the customer had paid for; and they- (the tailors) were eventually caught doing this. Prathieban Sathanathan Mrs. Collins Original Writing This reference to treason links with the earlier account of the Thane of Cawdor and a later discussion between lady Macbeth and her son. Shakespeare also includes the theme of nature in this scene, the porter explains how the farmer had hoarded his corn, hoping for a famine, so that he could sell it for a high price, but a good harvest (the expectation of plenty) has led to a drop in the price, and he has committed suicide. Because he depends on the seasons, he is a time- server (and will also serve time; in hell). Heres a farmer that hanged himself on the expectation of plenty; come in time server. There is a direct comparison made throughout the play about desire and act, this is also included in the porters scene. Drink provokes the desire, but it takes away the performance. This is typical of the frequent use of antithesis throughout the play. The scene proves on of the most essential for Shakespeare, as it is vital for any production of Macbeth. Various issues are exploited in the scene and it also gives way for on screen issues- such as changing, washing etc. So I feel that this is one of the most effective scenes in the play, even though the porter is crude and rough it is an effective scene- one which also makes the audiences laugh, and also gives the audience some beliefs on issues in the play.

Effects of donepezil in healthy young adults

Effects of donepezil in healthy young adults Rationale: The cholinergic system is involved in the modulation of both bottom-up and top-down attentional control. Top-down attention engages multiple executive control processes, but few studies have investigated whether all or selective elements of executive functions are modulated by the cholinergic system.. Objective: To investigate the acute effects of the pro-cholinergic donepezil in young, healthy volunteers on distinct components of executive functions. Methods: We conducted a double-blind, placebo-controlled, independent groups design study including 42 young healthy male participants who were randomly assigned to one of three oral treatments: glucose (placebo), donepezil 5 mg or donepezil 7.5 mg. The test battery included measures of different executive components (shifting, updating, inhibition, dual-task performance, planning, access to long-term memory), tasks that evaluated arousal/vigilance/visuomotor performance, as well as functioning of working memory subsidiary sy stems. Results: Donepezil improved sustained attention, reaction times, dual-task performance and the executive component of digit span. The positive effects in these executive tasks did not correlate with other attentional arousal/visuomotor/vigilance measures. Conclusions: Among the various executive domains investigated donepezil selectively increased dual-task performance in a manner that could not be ascribed to improvement in arousal/vigilance/visuomotor performance nor working memory slave systems. Other executive tasks that rely heavily on visuospatial processing may also be modulated by the cholinergic system. Cholinergic manipulations consistently alter sensory-driven, bottom-up attention but their effects on top-down, controlled processing have been less explored (e.g. Furey et al. 2008b; Hasselmo and Stern 2006; Sarter et al. 2001; Thomas et al. 2008), specially as pertains executive functioning. Executive-type processing comprises a wide range of cognitive processes that have a role in the control of action and are considered a function of the central executive in the multiple component model of working memory (see Baddeley 2007, p. 11; Repovs and Baddeley 2006). In the latest version of this model the central executive is responsible for manipulating information contained in subsidiary slave components that store information of different modalities for short periods of time, as well as information activated from long-term memory (Baddeley 2007; Repovs and Baddeley 2006). Today, executive processing is considered a multiple construct, consisting of different cognitive domains or components that, despite being correlated, are dissociable (Collette et al. 2006; Fisk and Sharp 2004; Friedman et al. 2006; Mantyla et al. 2007; Rabbitt 1997; Smith and Jonides 1999). Miyake (2000), in their influential paper on the diversity of executive functions, showed the dissociability of four postulated executive functions: updating, or modification of the content of working memory by deleting no longer relevant information and incorporating more relevant data (Miyake et al. 2000; Shimamura 2000); inhibition, the ability to inhibit distracting information when selecting relevant information, or to attend selectively to one stream of information while discarding others (Baddeley 1996a; Kane and Engle 2000); shifting, the ability to suppress response strategies when shifting between different tasks (Miyake et al. 2000; Monsell 2003); and dual- task performance, the abili ty to perform in parallel two tasks that rely on different cognitive systems (see Baddeley et al. 1997; Logie and Della Sala 2001). Other types of executive processes that were not evaluated by Miyake (2000) have been suggested as separate cognitive entities. One of these is planning, the ability to organize behavior in relation to a specific goal (Owen 1997; Shallice 1982), and the other is the efficiency of access to long-term memory (Baddeley 1996b, 1998; Fisk and Sharp 2004). Acute administration of anticholinergic drugs has been shown to impair executive functions by many authors (Curran et al. 1991; Green et al. 2005; Rusted and Eaton-Williams 1991; Rusted 1988; Rusted et al. 1991; Rusted and Warburton 1988) but in these publications usually only one executive test was used, mostly with unknown loading on the different executive components discussed previously. These finding are therefore not comprehensive in examining the executive domains that are affected by cholinergic manipulations. Aside from studying anticholinergic effects in different executive components, in order to demonstrate that the cholinergic system is in fact directly responsible for executive effects it would be important to show that drugs which increase the availability of acetylcholine, or pro-cholinergics, have the opposite effects. To this end, we studied the modulatory role of the cholinergic system on the 6 different types of executive processes outlined above by investigating dose-dependent effects of acute oral doses (5 and 7.5 mg) of donepezil, a potent, specific, non-competitive inhibitor of acetylcholinesterase (Jann et al. 2002; Shigeta and Homma 2001) that increases the availability of acethylcholine. We administered acute doses to young healthy volunteers because neurologic/psychiatric disorders and aging (Gron et al. 2005), as well as chronic use (Poirier 2002; Tsukada et al. 2004), alter the status of the cholinergic system. To assess executive functioning we employed tests that have been shown to reflect each of these 6 separable processes. To evaluate updating, inhibition and switching we used tasks described by Miyake (2000) that showed high loading in the confirmatory factor analysis performed by these authors in each of these executive components. For dual-task performance we employed a standardized paradigm (Baddeley et al. 1997; Della Sala et al. 1995; Greene et al. 1995). For evaluating access to long-term memory we used word generation tasks (see Fisk et al. 2004), and for planning we selected the ecological Zoo Map Test (Wilson et al. 1996). We also evaluated arousal and sustained attention/vigilance changes that could interfere with executive measurements, in addition to performance on other working memory subsidiary components (see Baddeley 2007; Repovs and Baddeley 2006) that store visuospatial data (visuospatial sketchpad), phonological information (phonological loop), and integrated inform ation from different modalities, including activated long-term memory (episodic buffer). MATERIAL AND METHODS Participants: participants were 42 healthy native Portuguese speaking volunteers (aged 18 to 35) with body mass index between 20 and 25, with at least 12 years of schooling. They were non-smokers, in good physical and mental health as determined by medical history, scored within normal ranges in the Beck Depression Inventory and the State-Trait Anxiety Inventory (Gorenstein and Andrade 1996), and were on no psychotropic medication at the time of the study. Procedure: this was a randomized, double-blind, placebo-controlled, independent group-design study in which participants were randomly allocated to three acute oral treatments formulated in identical capsules (14 subjects each): placebo (glucose), donepezil 5 mg and donepezil 7.5 mg. The Ethics Committee of the institution (Universidade Federal de Sà £o Paulo UNIFESP) approved the study protocol (project no. 0335/07) which was conducted in accordance with the Declaration of Helsinki. All subjects provided written informed consent and their IQ was estimated using the Ravens Progressive Matrices (Raven et al. 1988). On the day of the experiment participants were required to have a light breakfast after which they receive treatments. They were submitted to a test battery (see below) at 210 min. after treatments (close to peak-plasma concentration of donepezil: Jann et al. 2002) that lasted 1.5 h. with no prior training to insure that executive processing was involved (see Rabbitt 1997 ). Tests were presented in 4 randomly assigned orders, balanced between treatments. Test Battery Executive tasks Plus-minus task (Miyake et al. 2000): a measure of shifting that consisted of three lists of 30 two-digit numbers (the numbers 10-99 pre-randomized without replacement) on a single sheet of paper. On the first list, the participants were instructed to add 3 to each number and write down their answers. On the second list, they were instructed to subtract 3 from each number. Finally, on the third list, the participants were required to alternate between adding and subtracting 3 (i.e., add 3 to the first number, subtract 3 from the second number, and so on). List completion times, omission and comission errors were determined. The cost of shifting between the operations of addition and subtraction was then calculated as the difference between the time to complete the alternating list and the average times to complete the addition and subtraction lists. All the lists were performed under articulatory suppression (uttering the letter T) to prevent the use o phonological stratergies while the task was performed. Letter memory task (Miyake et al. 2000): a measure of updating in which several letters from a list were presented serially for 2000 ms per letter. The task was to recall the last 4 letters presented in the list. To ensure that the task involved continuous updating, the instructions required that participants rehearse out loud the last 4 letters by mentally adding the most recent letter and dropping the 5th letter back. For example, if the letters presented were T, H, G, B, S the participants should say, T . . . TH . . . THG . . . THGB . . . HGBS and answer HGBS at the end of the trial. The number of letters presented (5, 7, 9, or 11) varied randomly across trials to ensure that participants would continuously update their working memory representations until the end of each trial. After practicing on 2 trials with 5 and 7 letters, participants performed 12 trials for a total of 48 letters recalled, which took approximately 12 minutes. The dependent measure was the proportion of let ters recalled correctly in the right serial order. Stroop task (Stroop 1935): a test of inhibition that consists of a Word Colored Page, with common words printed in colors, and a Color-Word Page with names of colors printed in incongruent colors. The examinee must name the ink colors as quickly as possible. For each list the test yields two scores, the number of errors and the time necessary to complete the task. In addition, scores from the word colored page (which measures naming speed) are subtracted from those of the color-word page (naming with inhibition) to yield a score of the extra time needed for overriding the inconcruency of word name versus ink-color name. Dual-task paradigm (Baddeley 1997; Della Sala et al. 1995): evaluates dual-task performance. This is a paper and pencil test which involves a visuospatial tacking task (circle crossing) and a phonological/verbal one (digit span). The digit span task consists of the 90 sec. long repetition of digit sequences presented orally which the subject had to repeat in the proper order. Lists of increasing number of digits are read aloud at the rate of one digit per second and the participants are asked to repeat them in their order of presentation (forward digit span, which measures phonological loop functioning). Participants digit span was taken to be the maximum length at which subjects repeated correctly 5 of 6 sequences of digits. Spans or scores were the number of digits contained in the last sequence repeated correctly. The circle crossing task consists of traversing with an X a chain of 240 circles linked with arrows to form a path laid out on an A3-sized sheet of paper, which was pra cticed with a 240 circles path. Subjects are required to cross-out the circles as rapidly as possible for a period of 90 sec. The dual-task condition consists of the simultaneous execution of both tasks within a 90 sec period. To quantify participants performance we used the measure proposed by Baddeley et al. (1997), the mu index which expressed the overall percentage loss in the dual-tasks in relation to single tasks considering the contributions of both tasks to be of equal weight: mu = [1- (pm + pt)/2] x 100, where pm and pt were, respectively, the proportional phonological loss and visuospatial loss in the performance in the dual-task condition in relation to the single-task condition; pm equaled the number of correctly repeated digit sequences for the single-task (ps), and for the dual-task (pd), both divided by the total o sequences remembered (pm = ps pd); pt equalled the number of traversed circles for the single-task (ts) minus those traversed in the dual-task (td), divid ed by ts [pt = (ts td)/ts]. Zoo Map Test (Wilson et al. 1996): a task that measures planning abilities from the ecological Behavioural Assessment of the Dysexecutive Syndrome test battery (BADS). Participants are given a map of a zoo and a set of instructions relating to places they have to visit (e.g. elephant house, lion cage) and rules they must stick to (e.g. starting at the entrance and finishing at a designated picnic area, using designated paths in the zoo just once). There are two trials with identical aims that involve a visit to six out of the 12 possible locations. The first trial consists of a high demand version in which the planning abilities of the participants are rigorously tested. In the second, or low demand version, the participant is simply required to follow some instructions to reach specific locations. Scoring was based on the total number of errors in the high and low demand tasks, as well as the difference in time to conduct the high and low demand tasks [i.e. planning/thinking time a nd execution (drawing time) of the route in the high demand trials minus the drawing time in the low demand task (Allain et al. 2005)]. Word and letter fluency (Lezak 2004): to test access to long-term memory participants were told to orally generate as many words as possible that belonged to a given category and that began with a given letter in 2 minutes each. The participants were instructed not to use proper nouns or morphological variations of words and to void repetitions. Scores were the total number of words generated and errors. Executive digit span (modified from Della Sala et al. 1995): this task was the same as the digit span described above in the dual-task performance except that participants had to repeat the sequences backwards (backwards digit span). Spans or scores were the number of digits contained in the last sequence repeated correctly. A delta score (backward minus forward digit span) was also calculated because participants capacity to recall items backwards depends on their forward span. Other working memory test Corsi block test [computerized version based on Miyake et al. (2001)]: participants were shown a set of blocks (drawn as white boxes) and asked to remember the order in which they were tapped (shown as changing color). One box at a time turns black for 650 ms each, a duration short enough to discourage the use of idiosyncratic coding strategies. Five similar but different configurations of blocks were used in each trial to discourage participants from using numerical coding of box locations. Immediately after a sequence of taps, participants repeated the order (Corsi Block task direct, a measure of the visuospatial sketchpad) by clicking on the boxes with the mouse. Once the sequence of flashing boxes was completed, they had unlimited time to respond. There was a practice trial with two taps each, after which the sequences progresses in length from three to 10 taps or until the participants made two mistakes with a sequence of the same number of taps. Scores were the largest number of blocks recalled in the right sequence. The same procedure was conducted at the end of this task, except that subjects were asked to remember the taps in the inverse order (Backwards Corsi Block task, a general measure of executive functioning). Delta scores as calculated for digit span were also computed. Counting span [Conway et al. (2005) in the version designed for adults by Engle et al. (1999)]: a task of working memory capacity that evaluates storage in the episodic buffer component of working memory (see Baddeley 2007). Participants were presented with displays on screen which consisted of a random arrangement of three to nine dark blue circles, one to nine dark blue squares, and one to five light blue circles. The participants task was to count and remember, in the right serial order, the total number of dark blue circles presented in consecutive displays which varied randomly in number from 2 to 6 (3 sequences each). Scores were the number of correct sequences retrieved. Arousal/vigilance/visuomotor performance measures Psychomotor Vigilance Test (Dinges and Powell 1985): a portable device (Model PVT-192, CWE, Inc, Ardmore, PA) was used. The task consists of responding by button press to a small, bright red-light stimulus (light-emitting diode digital counter) as soon as it appears. Consecutive stimuli appear randomly in the range of 2 to 10 s for 5 minutes, resulting in 30-45 reaction time (RT) measures, depending on RT latency (Roach et al. 2006). Participants are instructed to press the button as soon as they see the stimulus, but not to press the button too soon (which yields false-start warnings on the display). Each subject was allowed a single 1-minute acclimation practice before the task commenced. Scores were mean total reaction time (RT), mean 10% fastest and slowest reaction times (Mean F RT and Mean S RT), all of which indicate arousal/psychomotor performance (Lim and Dinges 2008) and measures that indicate better sustained attention/vigilance (Lim and Dinges 2008), the percent change i n RT throughout the test (% change) and slope reaction time (negative numbers indicate slowing from the beginning to the end of the test). Statistical analysis To compare treatment groups we employed one-way analyses of variance (ANOVAs) with treatment as factor (3 levels: placebo, donepezil 5 mg and donepezil 7.5 mg) followed by post hoc Tukey HSD tests when appropriate. The level of significance adopted was pà ¢Ã¢â‚¬ °Ã‚ ¤0.05. Only measures that elicited significant drug effects are reported below. Magnitude of effects on the executive measures was determined through effect size calculations (Cohen d, Cohen 1988) as proposed by Snyder et al. (2005) and Fredrickson et al. (2008). In addition we calculated the Pearson Product Moment correlation between changes in arousal/vigilance measured by the PVT and the variables that showed significant effects. RESULTS Comparability of treatment groups The ANOVAs showed the comparability of participants in the three treatment groups in terms of age, body mass index and estimated intelligence measured by Ravens Progressive Matrices (ps>0.27), so performance differences between treatments could not be accounted for by these characteristics. Treatment effects (Table 1) Data on PVT task of one subject in the placebo group and data on fluency test of one subject in the placebo group and of two subjects in donepezil 7.5 mg group were lost due to technical problems with the equipments. The ANOVAs showed PVT treatment effects for the minimum reaction time (F2,38=4.42, p [Table 1 and Figure 1 near here] Magnitude of effects Effect sizes (see Table 1) comparing placebo and 7.5 mg of donepezil were large (pà ¢Ã¢â‚¬ °Ã‚ ¥0.8, see Cohen 1988; Sloan et al. 2005) for most of the PVT measures, as well as the delta score of the digit span. The remaining comparisons between these groups yielded medium effect sizes (between 0.5 and 0.8), that together with large effect sizes are considered meaningful differences (Cohen 1988; Sloan et al. 2005), and included the dual-task measure. Correlations between executive and other general attentional measures In order to determine whether arousal/vigilance/visuomotor changes were responsible for the observed executive effects, we calculated Pearson Product Moment correlations between the PVT measures and the executive measures that showed significant effects of donepezil (mu dual-task index and delta scores of the digit span). Correlation values were small and non-significant (all ps>0.05 and rs between -0.22 and 0.17). 5. Sample sizes In order to show that the sample size was adequate for this set of data we calculated the number of individuals necessary to show significant differences between placebo and the donepezil dose that showed significant differences in relation to placebo (7.5 mg). To do so we used the calculations proposed by Rosner (1999) [with an ÃŽÂ ± of 0.05 and 80% power]. This takes into account the mean values of the groups under comparison and their common standard deviation. We carried out these calculations considering one-sided differences since our hypothesis was that donepezil would increase performance (see table 1). DISCUSSION In the present study we completed a comprehensive examination of the potential capacity of a pro-cholinergic drug to improve executive functions in healthy young adults exploring diverse processes associated with executive tasks. Our findings extend previous reports on the acute nootropic potential of this drug in young, healthy volunteers (Hutchison et al. 2001; Thompson et al. 2000; Zaninotto et al. 2009). More specifically, an acute 7.5 mg dose of donepezil improved arousal/vigilance/visuomotor measures in addition to increasing performance especifically in the executive dual-task domain. An increment in delta digit span was also observed, a task that has unknown loading on the 6 executive components studies here. A role for acetylcholine in modulating executive function is consistent with earlier work reporting impairment after acute doses of the antimuscarinic scopolamine (Ellis et al. 2006; Green et al. 2005; Rusted et al. 1991a; Rusted 1988; Rusted and Warburton 1988; Thomas et al. 2008). However, in the present study we found this effect to be highly selective within the broad battery of executive domains. Only the dual-task domain measure was sensitive to the effects of donepezil while this drug left the remaining 5 tested executive domains unchanged. These evidences suggests cholinergic enhancement in the coordination of two tasks that rely on different cognitive systems, possibly due to activation of cortical cholinergic inputs which facilitate cognitive processes by increasing filtering of noise and distractors, which are necessary under taxing attentional conditions (Sarter et al. 2001). The magnitude of these positive changes reflected medium effect sizes which are treated as clinically meaningful (e.g. see Sloan et al. 2005) and that should be considered in light of the fact that the participants had optimum baseline performance having been young, highly educated, physically and mentally healthy, not deprived of sleep, food or otherwise compromised. The present result was not mediated by increases in speed of information processing, improvement in performance that relies in subsidiary working memory systems, nor task demands, as discussed below. This (see Logie and Della Sala 2001) lends support to the idea that the cholinergic system is involved in the executive process that coordinates different specialized functions when considered together with previous reports of scopolamine induced impairment of dual-task performance (Rusted and Warburton 1988). It is also noteworthy that patients with Alzheimer ´s disease, which is in part characterized by cholinergic deficiency (Everitt and Robbins 1997), display particular problems in dual-task in comparison with single-task performance using the same (Baddeley et al. 1991; Greene et al. 1995; Kaschel et al. 2009) and different (MacPherson et al. 2007, see also Logie and Della Sala 2001) dual-task paradigms. Hence, we here obtained a pharmacological dissociation that confirms behaviou ral data suggesting the separability of dual-task coordination from other executive domains (e.g., Baddeley 1996b; Baddeley and Della Sala 1996; Bourke et al. 1996; Bourke 1997; Miyake et al. 2000; see also de Ribaupierre and Ludwig 2003). It could be argued that this was solely due to the lack of power of the study. Sample size calculations taking into account data from the placebo and donepezil 7.5 mg groups showed that the number of participants necessary for the obtention of statistical effects in the measures that were statistically significant here were close to that used in this study. However, the number of individuals in each group had to be larger than 66 to show significant effects in the remaining executive domains (Table 1). To our knowledge no study in this field of research has ever used such a large sample size. Hence, we believe that dual-task performance, among the executive domains investigated here, is particularly sensitive to improvement by increases in acetylcholine levels. On measures of general attention, donepezil improved (significantly with large effect sizes) sustained attention, arousal and visuomotor performance in the PVT, cognitive functioning measures that have been previously shown to be affected by cholinergic manipulations (Furey et al. 2000, 2008a; Meinke et al. 2006). These changes could in themselves have led to better executive performance, but this seems unlikely in the present case because better overall attention would not have benefited only this single executive component. In addition, no significant correlation was found between these general attentional scores and those of the executive tasks that were enhanced by donepezil, and r values were small. The changes in executive functioning found here could also not be ascribed to improvement in the subsidiary working memory systems which were unchanged by donepezil, in accordance with previous lack of effects with other acute cholinergic manipulations of the articulatory loop and visuospatial sketchpad (see Mintzer and Griffiths 2007; Rusted 1988; Zaninotto et al. 2009), as well as the episodic buffer (see Zaninotto et al. 2009). These changes could also not be attributed to task difficulty, as the letter memory task was at least as demanding as the dual-task. This latter task involved continuous updating of information of letter sequences, some of which extended way beyond subjects spans, for approximately 12 minutes, and showed no treatment effect. Performance in this task was unchanged by donepezil administration, but a similar n-back updating task has been shown to be impaired by acute doses of scopolamine (Green et al. 2005). In the latter case, though, the n-back task relied h eavily on visuospatial perception and processing, which seem particularly sensitive to cholinergic manipulations (Ellis and Nathan 2001; Thomas et al. 2008; Zaninotto et al. 2009). In retrospect we noted that none of the executive tasks used here made specific demands on this type of processing, neither did the executive inhibition task employed by Mintzer and Griffiths (2007), which was unaltered by acute scopolamine administration. In effect, Thomas (2008) suggested that visuomotor and working memory processes that subserve visuospatial executive function are specifically dependent on cholinergic neurotransmission. Hence, enhancement of cholinergic activity could cause specific top-down optimization of visuospatial input processing which could lead to improved executive visuospatial performance, especially if the extensive involvement of executive functions with visuospatial short-term memory is taken into account (see Miyake et al. 2001). Based on this suggestion it may be hypothesized that the improvement in the delta digit span measure obtained here (high effect size) and in a recent donepezil study (Zaninotto et al. 2009), as well as impairment after anticholinegic drugs (Guthrie et al. 2000) reflect effects of cholinergic manipulations because backward digit span seems to involves activation of occipital visual cortical areas (more so than the forward version of this test) in addition to prefrontal ones (see Sun et al. 2005). Therefore, a conjunction of executive attention and facilitated visual processing by donepezil may have led to the increase in performance in this task. Although we found cholinergic effects it is not possible to determine whether the present finding are due to the activation of nicotinic or muscarinic receptors because donepezil increases the amount of acetylcholine that can activate all acetylcholine receptors. Both types of receptors have been found to interact functionally, having synergistic effects particularly on visuospatial attention (Greenwood et al. 2009), working memory, and vigilance tasks (see Ellis et al. 2006; Erskine et al. 2004) so our data may reflect the effects of their combined activation. In sum, acute oral administration of 7.5 mg of donepezil to young, healthy volunteers had a selective positive effect in executive dual-task performance that was seemingly independent of the donepezil-induced improvement on broad attentional processes (arousal/visuomotor/vigilance) and working memory slave systems, corroborating the proposal that this type of executive processing constitutes a separable cognitive construct. In addition, improvement in the digit span delta scores points to the role of cholinergic modulation on other central executive measures, possibly those that rely more heavily in visuospatial processing.

Violent Video Games Raise Aggression Essay -- Gaming

Throughout history man kind has always searched for ways to entertain himself, each time developing new activities and games. Video games have become a very popular way to spend time and have fun from the 1970’s up to now. With new developments appeared different video game genres from adventure to racing, but the violent video games appear to be the most popular ones (Shin, 2003), for example: shooters, fighting and video games where you have to eliminate, destroy, or kill your enemies. Video games have become very influential on children and adults (Stafford, 1999). With violent video games humans are more prone to act aggressively, to have aggressive thoughts and become numb towards violence (Harding, 2009). Apart from these they are prone to develop antisocial behavior, depression and addiction. This means that future generations will be more violent and less sensible towards violence. Is this type of entertainment really worth a more violent world and future? B. The IT background of the issue Back in time input devices for video games were analog this means that data was very short ranged and limited like for example movements in the x-axis only, like in â€Å"Pong†. This is one of the reasons why before there were very few and not that violent video games such as â€Å"Space Invader†. But as technology developed so did the video game industry (Reynolds, 2004) and input devices became each time more complex. With more option in the input devices people can do more actions in the video games like for example combo moves or kill enemies in many other different ways (Stafford, 1999). Another development that has caused the appearance of violent video games is the increase in quality of the output. Before, the only VDU’s were C... ...1/2008. CNN. 24/05/2010 â€Å"Insert Coin: Part 5-Violence in Video Games†. Brent Stafford. Internet. Youtube, 02/11/2006 Shaky egg. Brent Stafford. 2004. Shaky Egg Communications Inc. 24/05/2010 Red3d. Craig Reynolds. 22/07/2007. None. 24/05/2010 About.com. Jennifer Rosenberg. 2003. The New York Times Company. 24/05/2010 Gamezero. Salamander. 08-09/1992. Game Zero Magazine. 24/05/2010 Tgorski. Terence Gorski. Unknown. GORSKI-CENAPS Team. 24/05/2010

What It Means To Be Australian :: essays research papers

What It Means To Be an Australian Australia is a very unique place, along with our multiculturalism there is also a strong heritage surrounding us. At first thought of Australian heritage we think about such landmarks as Uluru, The Sydney harbour bridge and The Sydney opera house, The Great Barrier reef and other internationally recognised places. But our heritage goes much deeper than that; it is far more than outstanding icons. Along with these icons there are also unsung places like the old cattle stations, Aboriginal missions, migrant hostels, War memorials, our unique wetlands and the towns and cities we have built. Adding all of these things together, helps to tell the story of who we are and how we have shaped this land in the unique identity it has today.   Ã‚  Ã‚  Ã‚  Ã‚  But familiar landmarks and also the unfamiliar ones aren't the whole make-up of Australia's heritage. It's the people that make a difference. Australia is made up of people from all walks of life who have migrated here for different reasons. Among these, the most common migrants are from Greece, Italy, Russia and Asia. Australia is made up of material culture: the places and objects, but also Living culture: In forms such as Music, Crafts, Literature etc. It is an interplay between international cultures and beliefs, the claims of nationalism and ethnic and religious traditions, as well as the local and community priorities that’s make up the unique Australian heritage. The Aboriginal people of Australia were here thousands of years before European settlement and we forced them to adapt to the changes of environment around them. This change might be for better or worse, but we will never find out. But with the European settlement came the birth of industry, agriculture, forestry, fishing, mining, manufacture, electricity, gas and water just to name a few.

Editing The Internet :: Cyberspace Children Essays

Editing The Internet Now a days it is common for there to be computers in every classroom. Some people consider this to be beneficial and others believe it to be detrimental. Having access to the internet is great for research and exploration the problem is that it is not always safe for children. This topic is not only important for teachers but for parents also since many children have internet access at home. I say that the internet is not always safe because students may accidentally stumble upon sites which contain pornography, violence, weapons, and other subjects that are inappropriate for them. I don't work on computers that much so I wasn't aware of how easy it is for a person to open a site that contains nudity or violent activity. I always thought that the only way a person could get to a pornographic site was by paying to see it. Unfortunately this is not the case. I realized this because at the school where I work there have been cases where girls type in "Barbie" to find information about the Mattel "Barbie" and they end up getting to a pornography site. We also had one boy who was doing research on the white house and when he typed in the words white house it was another pornography site. It happens far too many times that children innocently type in a few words like Spice Girls to find out information about a music group and end up at an obscene internet site. I as a teacher and mother want to find a way to prevent my students from getting into the inappropriate sites while at the same time letting them explore the internet for whatever topic they may be researching . There must be some way in which we, the teachers, administration, and parents can filter out the inappropriate sites from the appropriate ones. Some teachers I work with have come up with their own solutions in regards to keeping the students away from improper sites. One teacher bookmarks all the sites he allows his students to get into. So when the students get on the computer they can only open up those sites. This may be one solution but I believe that it limits the children. Like I mentioned earlier, I'd like to find a way in which they can search however many sites they like without getting into anything bad. Editing The Internet :: Cyberspace Children Essays Editing The Internet Now a days it is common for there to be computers in every classroom. Some people consider this to be beneficial and others believe it to be detrimental. Having access to the internet is great for research and exploration the problem is that it is not always safe for children. This topic is not only important for teachers but for parents also since many children have internet access at home. I say that the internet is not always safe because students may accidentally stumble upon sites which contain pornography, violence, weapons, and other subjects that are inappropriate for them. I don't work on computers that much so I wasn't aware of how easy it is for a person to open a site that contains nudity or violent activity. I always thought that the only way a person could get to a pornographic site was by paying to see it. Unfortunately this is not the case. I realized this because at the school where I work there have been cases where girls type in "Barbie" to find information about the Mattel "Barbie" and they end up getting to a pornography site. We also had one boy who was doing research on the white house and when he typed in the words white house it was another pornography site. It happens far too many times that children innocently type in a few words like Spice Girls to find out information about a music group and end up at an obscene internet site. I as a teacher and mother want to find a way to prevent my students from getting into the inappropriate sites while at the same time letting them explore the internet for whatever topic they may be researching . There must be some way in which we, the teachers, administration, and parents can filter out the inappropriate sites from the appropriate ones. Some teachers I work with have come up with their own solutions in regards to keeping the students away from improper sites. One teacher bookmarks all the sites he allows his students to get into. So when the students get on the computer they can only open up those sites. This may be one solution but I believe that it limits the children. Like I mentioned earlier, I'd like to find a way in which they can search however many sites they like without getting into anything bad.

Healthcare2 Committees, Euthanasia

Euthanasia laws are sometimes termed to as Physician assisted or the right- to- die laws. The laws tend to specify whether euthanasia is permitted in the laws of the states and the legal aspect of it. Euthanasia involves the withdrawal of life supporting medical procedures to let a person die, i. e. assisted suicide (Pozgar, & Santucci, 2010). In the real sense, there are no specific federal laws regarding the case of euthanasia. Laws regarding this issue are often left to be dealt with at individual state levels and therefore tend to differ from state to state.Ethical Aspects of These Laws Some arguments for and against euthanasia have been brought forward. Ideas’ campaigning for euthanasia argues that the process should be administered if the person is under severe pain, or physical and psychological suffering. It is argued that euthanasia will help relieve these people from suffering that they might be experiencing. The opponents against euthanasia are based on the act of k illing being morally unacceptable and wrong. Killing is forbidden and goes against religious teachings.Some believe that though some diseases or illness may be cured from new procedures being discovered and unexpected healings occurring. Mercy killing will also lower health care thus leading to victimization of vulnerable individuals (Pozgar, & Santucci, 2010). Legal Rights of Patients, Families, and Friends The legal and ethical aspects relating to euthanasia are current dilemmas facing the medical care professionals currently. Decisions by family and friends of the sick are depended on the love and care they have for their loved one.Therefore the decision to either end the life of an individual should entirely lie on the family. The families have the rights to decide for their sick members especially if they are undergoing severe pain and sufferings. They also have a right if their patients are in a comatose or a vegetative state and can not make decisions on their own. 2. Health Care Committees This is a group of people who are charged with the responsibility of acting as resource personnel when decisions involving ethical issues become a challenge.The committee constitutes of public members, doctors, ethicists, nurses, social workers and lawyers among many others. The committee consults in private and offer guidance and assistance regarding ethical matters. From the advice given by the committee, the health personnel make the final decision regarding the step to take assisted by the patient and the family members (Pozgar, & Santucci, 2010) Best Attributes Of Ethics Committee The committees offer consultations that lead to decisions that best befit the sick, their families and the health care personnel.The committee is present to offer recommendations regarding issues concerned with policy development and the entire public is educated on ethical issues. Apart from this assistance, the committee also offers help in relation to medical care versus health care provision and look into the disagreements of health personnel on treatment channels to be followed (Otlowski, 2000). Worst Attributes Of Health Care Ethics Committees The committee is viewed by family members of those to undergo euthanasia as killers. This is due to the decisions they normally arrive at.The committee is faced with new challenges each time a new case is brought before them. Decision makings, course of actions suggested and way forward suggested by the committee has the aspects of right and wrong in relation to the final decisions arrived on by the family and medical practitioners. Ethics Committees Helps Foster and Ensure Ethical Standards Are Upheld In the Medical Profession The ethics committee is made up of professionals. As indicated, the committee is made up of people from different professions who are quite familiar with different ethical issues.From the constant consultations held regarding ethical issues, it is with no objection that sound decisions are ofte n arrived at. Most often, the decisions they arrive at are found to be embraced by the sick, their families and the medical practitioners since they take into consideration what is good for these different people. This therefore implies that ethical standards are held up high. References Pozgar, D. & Santucci, N. (2010). Legal and Ethical Issues for health care professionals. New York: Jones and Bartlett Publishers. Otlowski, M. (2000). Voluntary Euthanasia and the Common Law. London: Oxford University Press.

DNA †Modified Food Essay

Some vegetarians do not prefer to consume genetically modified vegetables or food products because they contain other genes which they have no idea about. The consumers find these genes unsafe for their health. The people must have the knowledge that the addition of these genes into the plants is done only to give them a better food product, but it’s therefore important to label genetically modified foods because it enables the consumer to determine and know the right choice of food information that is needed. Genetic modification is the technology by which the genetic makeup of the living organism such as plants and animal’s bacteria is changed. Thus the resultant organism is called genetically modified, genetic engineered or transgenic. Source citation (http://www. ext. colostate. edu/pubs/foodnut/09371. html). First of all Consumers have a right to know what’s in their food, especially concerning products for which health and environmental concerns have been raised, this I think is one of the most important reason why individuals will prefer the labeling of genetically modified food, and also to know the condition of the environment of which the product was made from weather is a place with good sanitation or not. Mandatory labeling will allow consumers to identify and steer clear of food products that cause them problems because some people who with medical problems or allergic to some product will have to know before using them in order not to get themselves in trouble or contracting any form of diseases Surveys indicate that a majority of Americans support mandatory labeling. (However, such surveys often do not specify the effect on food prices.) Least 21 countries and the European Union have established some form of mandatory labeling source citation (Gruere and Rao, 2007; Phillips and McNeill, 2000) For religious or ethical reasons, many Americans want to avoid eating animal products, including animal DNA. For example some religious beliefs enact laws for people to avoid eating some certain products due to this labeling of genetically modified food will help consumers know the right choice of product to consume example are the jewish and the buddist.