Neurotransmitter Serotonin Cause Depression Psychology Essay

Neurotransmitter Serotonin Cause Depression Psychology Es opine jibe to the World Health Organization, about 121 million people across the globe suffer from economic crisis and the WHO has ranked depression as fourth in a list of most urgent problems worldwide (2). It is the most prevalent psychiatric disorder and is responsible for nearly 850,000 deaths every year. Supporting this fact, statistics have revealed that the use of anti-depressants has so atomic number 18d everywhere 400 part in the past two decades (3). According to Kresser, a licensed acupuncturist and practiti starr of integrative medicine, several chemic each(prenominal)y distinct anti-depressants marketed under divvy up names such as Prozac, Zoloft, and Paxil now enjoy immense popularity as anti-depressants (4). Amongst the four classes of anti-depressant medication, namely selective serotonin reuptake inhibitors (SSRIs), atypical depressants, tricyclic antidepressant anti-depressants (TCAs) and monoamine oxi dase inhibitors (MAOIs), SSRIs have been the most widely prescribed medication by physicians. In this essay, the terms SSRI and anti-depressant will be used interchangeably.The current model of SSRIs assumes that a deplorable take aim of extracellular neurotransmitter, serotonin, is primarily responsible for depression. Serotonin in our body can be found in two places 80 percent of it in our gastrointestinal tract while the rest in our mind-set (5). The 80 percent of serotonin function as hormones and they play a eccentric in muscular contractions whereas the 20 percent act as a neurotransmitter in our wiz (6). In our brain there are many cells c everyed neurons, which are separated by small gaps. Messages carried by neurotransmitters are delivered from one neuron to another across the gaps. These messages come in the form of chemical impulses, and contain study about peevishness, behaviour, body temperature, appetite and sleep. Once a neurotransmitter leaves the sending ne uron, it will latch onto the receiving neuron and relay chemical impulses over. Then the neurotransmitter returns to its sending neuron to be re-used again this process is called reuptake. On the other hand, if there are inadequate amounts of neurotransmitters, the next impulse does not fire off and messages will not be relayed. (7) SSRIs work to block or s piteous ware the reuptake of serotonin in particular, hence increasing the amount of extracellular serotonin. As a result, more than serotonin are present in the gaps which will increase rate of successful transmission of impulses to the receiving neuron. SSRI is hence engineered on the persuasion that serotonin is the serve of depression. However ever since the advent of the medicine and its side-effects exposed, medicine researchers are compelled to re-investigate the efficacy of SSRIs, in which confounding results were revealed.The investigation into the serotonin-depression link will not nevertheless delay doctors ma king inappropriate prescriptions that whitethorn not be in the best interest of their patients health, it also allows a clearer definition of the causes of depression. Ultimately, establishing the proper function of serotonin whitethorn lead to a ground-breaking change in the methodology of treating depression and related disorders in the psychiatric and pharmacology world.While most people concur with the belief that a deficiency of serotonin is related to depression, some argue that an imbalance in serotonin levels leads to depression. This imbalance theory arises because of the widespread notion that SSRIs are only effective for patients with moderate to severe depression while it is ineffective for mildly depressed patients. The basis of the debate surrounding the efficacy of SSRIs in fact boils down to a deeper problem whether or not the neurotransmitter, serotonin, is related to depression at all. Nevertheless, I oppose both claims of the serotonin-depression link and contes t that there is no cohesion amid levels of serotonin and depression. Up till now, there have no substantial evidence that depression is caused by serotonin deficiency, neither is there one that shows that over stimulation of serotonin causes depression.Efficacy of SSRIs challenged by small drug-placebo differenceMany studies have shown that the efficacy of SSRI drugs in the treatment of depression is challenged by low drug-placebo difference scores. Studies to investigate the efficacy of anti-depressants by giving placebos to a controlled group have revealed that the recovery rate of patients who took a glucose pill was equivalent to patients who consumed the anti-depression drug (8). A 2008 meta analysis of the efficacy of SSRIs that was published by the Food and Drug Administration (FDA), revealed that these anti-depressants have no clinically significant edge over all placebos. By this, it means that it did not resonate the drug licensing authority, UK National Institute of Cl inical Excellence (NICE) standards. As evident in the meta analysis, the placebo response groups account for up to 75 percent of all positive effects of anti-depressant medication (9) which shows that 3 in 4 of all patients who reported an increase in heightened emotional wellbeing were actually consuming sugar pills. Other studies yielded similar results a study by Khan et al. found a 10 percent difference in level of symptoms when patients consume the slow placebos compared to the busy drugs in two separate meta-analyses (10). As the drug-placebo difference is small, it can be seen that regardless of whether SSRI is administered or not, symptoms of depression are still greatly reduced. This implies that serotonin level may not be related to depression at all.Opponents argue that experiments to test the efficacy of SSRIs against inert placebos may not be accurate because the side effects of SSRIs are not mimicked. They claim that commonly known side effects of SSRIs, such as di arrhoea, nausea, dizziness, headaches or even gastrointestinal bleeding (11) may affect patients mood, which in turn underrate the impact of serotonin in lifting depression. This claim is however rejected by many scientific literatures which show counter-evidences. According to Joanna Moncrieff, the co-chair person of Critical Psychiatry Network, when she used active placebos to simulate the adverse-effects of SSRIs in anti-depressant drug trials, results revealed that differences between active placebo and SSRI were significantly small (12). To measure callousness of depression before and after the drug trials, the conventional Hamilton Rating Scale of Depression (HRSD) was used. Since it did not meet NICE standards of an feeler in rating score of 3 points to be defined as clinically significant (8), the above studies involving inert and active placebos distinctly show that no matter which placebo type was administered active or inert, drug versus placebo significance in anti-d epressant efficacy is clinically insignificant. Whether or not the level of serotonin is increased, patients reported a reduction in symptoms of depression, therefore there is little evidence to say that a lack of this neurotransmitter causes depression.Another common belief by proponents of anti-depressants is that sign severity of depression is directly related to the metier of SSRIs, that SSRIs work best for patients with very severe depression. It is thought that over stimulation of serotonin may cause further chemical imbalance in patients misfortunate from mild depression, hence rendering SSRIs ineffective (13). Thus in order to test this claim, Kirsch et al moved on to investigate whether initial severity of depression affects the efficacy of anti-depressants. He tested on the hypothesis that anti-depressants work only for people suffering from moderate to major depression. In this double-blinded study of 35 clinical trials involving 5,133 subjects, both drug administers a nd subjects were unknown to results of randomized medication (placebo or SSRI) to prevent sampling biasness and subjects severity of depression was mensural by HRSD (14). The test was conducted to see if there is an improvement in the subjects depression, measured against their baseline severity and the final conclusion is as follows patients with an initial moderate depression did not report a drug-placebo difference, patients with an initial severe depression reported a relatively small drug-placebo difference and only for patients rigid at the upper end of very severe depression category did the drug-placebo difference fall into the clinically significant criterion by NICE standards (8). Although effectiveness of SSRIs may seem to improve with the severity of depression, further research has revealed a negative coherence between severity and placebo response. As highlighted from Figure 1, the drug-placebo difference reached clinical standards for people with a higher initial se verity of depression. Further analysis shows that a higher drug-placebo difference is due to a decrease in improvement of the placebo group rather than due to the effects of SSRIs.Figure 1. Mean Standardized Improvement as a Function of Initial Severity and Treatment Group, Including all Trials Whose Samples Had High Initial Severitygraph.pngSource http//www.plosmedicine.org/article/fetchObject.action?uri=infodoi/10.1371/journal.pmed.0050045.g003representation=PNG_MThis implies that the increased benefit for extremely depressed patients seems attributable to a response-deficiency to placebos rather than a heightened response to SSRI medication. thitherfore efficacy of SSRI does not increase with severity of depression and increasing amount of serotonin did not work for patients with all levels of depression. Since SSRIs are designed to alleviate depression by inhibiting the reuptake of serotonin in our brain cells, it shows that there is no relationship between extracellular seroto nin and ones mood. Furthermore, it usually take weeks before effects of anti-depressants are expressed and can be measured by testing for serotonin levels in the blood, yet patients very much report relief within hours or days of medication. Therefore this phenomenon demonstrates the lack of correlation between serotonin and depression and gives support to the placebo effect.The lack in correlation is further evidenced by the results of a Force Swim Test (FST). FST, also known as the behavioural despair test, is a conventional anti-depressant book binding test which involves using rodents as test subjects. In this test, rats are dropped in an enclosed water cylinder and their movements observed. The struggling time of rats is measured based on the assumption that immobility of rats is directly proportional to their state of depression. For example depressed rats will cease trying and float in the cylinder, which is akin to despair, whereas non-depressed rats will stay fresh to s truggle in search of a way out (15). Although it is thought that SSRIs should extend struggling time of rats, final results were inconsistent hence inconclusive (16). The electric pig of SSRIs in rodents did not make them less susceptible to depression, displaying no direct relationship between serotonin and depression. Nonetheless, it should be noted that experiments done on mice may not be entirely accurate in predicting responses in humans (17).The bold assumption make by researchersThe serotonin-depression link came about when scientists first spy that in most depressed patients, the level of serotonin is comparably lower than that in non-depressed people. The amount of serotonin in a humans body was measured by comparing blood samples taken from depressed and healthy people. Subsequently the anti-depressant SSRI was invented, which targets the neurotransmitter serotonin and works to stimulate the production of it. This methodology then raises a few doubts. Firstly, the assump tion that blood serotonin and brain serotonin are directly proportional can be contested as it is certainly hopeless to measure the amount of serotonin in the brain. Patients who have high levels of serotonin in the blood may have low levels of serotonin in the brain and vice versa. As mentioned earlier, 80 percent of the humans body total serotonin is found in our bloodstream and the rest in the brain. While the level of blood serotonin can be measured, current biomedical technology has yet to transcend the brain barrier. In all clinical trials involving SSRIs, the assumption made is that blood serotonin reflects brain serotonin, which is a very bold one to make. This then creates a paradox in research methodology the reason for inventing SSRIs instead of feeding serotonin directly to a humans body is due to the blood-brain barrier. Orally ingested serotonin are ineffective as they do not highway through bloodstreams into the brain, that is the digestive system is unparallel to the central nervous system. Whereas SSRIs work because they merely seek to enhance an impulse that is already present, but too imperfect to cross the gap. Yet scientists conveniently established a link between serotonin and depression by measuring serotonin in patients blood. It is reasonable to say that since blood serotonin is not proven to be a clear indication of brain serotonin, any positive outcomes of anti-depressant drug trials may not be due to the increase in brain serotonin but other unknown factors. This again shows a lack of tangible evidence between the neurotransmitter, serotonin, and depression.Secondly, in all probability that there is a direct attestation of serotonin deficiency in any mental disorder lacking, it is still unclear whether low levels of serotonin causes depression or depression causes a dip in serotonin. Evidences supporting the latter can be based on observations of non-depressed people with low amounts of serotonin. In a 1996 investigation of the biochemistry of depression, attempts made to induce depression by reducing serotonin levels yielded no consistent results (18). Similarly, researchers found that a surge in brain serotonin, arrived at by administering SSRIs, were ineffective at alleviating depression (19). Therefore there is little evidence to support serotonin as a mood chemical.Also problematic for the serotonin-depression claim is the expanding field of research comparing SSRIs to other anti-depression drugs that do not target serotonin specifically (20). For instance, the atypical anti-depressant buproprion (21) and St. Johns Wort (22), which do not alter the level of serotonin were proven to be just as effective as SSRIs in the treatment for depression. Therefore doubts about the serotonin-depression link are acknowledged by many researchers as well as by advocates of SSRIs (23). To supplement my stand, serotonin is not listed as the cause of depression disorder in theDiagnostic and Statistical Manual of Menta l Disorders (24). The American Psychiatric Press Textbook of Clinical Psychiatry (25) also reiterates that serotonin deficiency as an unconfirmed hypothesis (20). In short, there exists no rigorous corroboration of the serotonin theory, which may suggest the reliability of positive drug trials published by drug companies.ConclusionIn addition to what textbooks have to say about serotonin, it is important to look at what not being said in scientific literature. There are numerous peer-reviewed articles supporting the disconnect between serotonin and depression however not a single one can be barely cited to directly endorse claims of a serotonin deficiency in any mental disorders (20). Assuming that blood serotonin is a good measure for brain serotonin, abundant evidences of high placebo significance in anti-depressant drug trials, the rejection of the claim that efficacy of SSRIs depends on severity of depression, and an inconsistent Force Swim Test results indicate that serotonin may not be the cause of depression. No doubt there may be a positive outcomes from the drug trials, however because blood serotonin may not reflect brain serotonin, these outcomes coupled with the above mentioned proofs against the serotonin hypothesis strongly suggest that other factors are involved in depression. The incongruence between the scientific literature and the claims made by proponents are prominent, hence I stand for the fact that there is no direct correlation between serotonin level and depression.

An Inspector Calls by J.B. Priestley :: Papers

An Inspector Calls by J.B. Priestley In my English class I have been reading the play An Inspector Calls The play is astir(predicate) a fairly well-off family (the Birlings) who have their evening spoilt by having an inspector chitchat round, to ask them questions about a girl, Eva Smith, who drank some disinfectant to kill herself. I am going to start my comparisons with the head of the house-hold, Arthur Birling. Arthur Birling is a selfish, arrogant, family man who doesnt cope the meaning of the word responsibility. The play starts off with the family sat around the dining table, toasting to the daughter, Sheilas, engagement to Gerald Croft. While the girls (Sheila and her mother, Sybil) trail off to the drawing room, Arthur decides to teach Gerald something about responsibility A man has to mind his own business and look after himself and his own He also has a fairly good reason as to wherefore he thinks like this, and he tells so to the inspect or If we were all responsible for everything that happened to everybody wed had anything to do with, it would be very awkward, wouldnt it? When Arthur doesnt know the full story as to why the inspector has arrived, he tries to use his importance to get his way. He threatens the inspector with the following phrase Ive half a mind to report you perhaps I ought to warn you that our chief constable hes an old friend of mine, and that I see him fairly often Arthur doesnt react at all to the death of Eva, and he acts as though such is life. When the inspector leaves towards the end of the play, Arthur tries to think of all sorts of ideas to prove that the man wasnt an inspector at all, - proving that Arthur didnt change at all in reaction to the death of adept of his former employees. Sybil Birling is Arthurs wife. She is very like her husband in being selfish, and is very unrepentant. Sybil finds out that she had

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The entire book is told from the view of Robert D. H ar, PhD., a psychologist and researcher of psychopathy. Hare decided to write this book to remove light on the many psychopaths that live among all of us from day to day. Hare does this by using evidence from case studies, stories told to him, and the private meetings he had with the psychopaths that he has met along the way. Hares account was an excellent read because he was very modest, even admitting to being fooled by some of the psychopaths he encountered, which made him expect more like a real person. The mind of a psychopath is still far from being explained, however Hare feels the crush way to protrude out a psychopath operates is to stop them before they are able to cause any damage. Doing so, victims would not be harmed mentally and physically, saving tax payers money due to court costs, rehabilitation and parole programs that simply dont work. Psychopath 1The Mind of a PsychopathWithout Conscience The Disturbing hum an race of the Psychopaths Among Us describes how Hare began his career in a prison and first realized he was face to face with a psychopath named Ray, who was a prisoner. At that time, Hare believed the inmates could be rehabilitated. Ray was Hares first patient and they worked together for several months before Hare realized Ray was manipulating him. Hare apply his own practices, diagnoses, as well as interviews from serial killers to let readers receive what a psychopath was really like. Hare also believed a psychopath is not crazy or insane, but the decisions made by a psychopath are conscientiously made. Hare goes onto stress that not all serial killers are psychopaths, that some are actually insane. According to Hare, psychopathy cannot be understo... ...sychopaths should integrate their persistent self-interest, pointing out how time after time their anti-social behavior is not finally in their best interest.As shocking as it may sound, so many people have either come fac e to face, or know of someone that has met a real life psychopath. Unfortunately, most wont know it until its too late, and even then, it could be almost impossible to understand that it has happened. These arent just the Mansons or Jeffrey Dahmers of the world. Psychopaths are not always killers, and some are not even violent. As Dr. Hare pointed out in this book, some of the best trained and most experienced mental health professionals can and will be fooled at least once in their lifetime. This book was very mild to read and to comprehend, leaving someone prepared to handle a situation if dealt with a psychopath a little bit easier.

The Digital Divide Essays -- essays papers

The Digital DivideAbstractAround the world 429 million people are connected to the Internet. forty-one percentage of those people cornerstone be found in North America. Although 429 million seems like a large number it is only 6 percent of the global population (Fact Sheet, 2004). Numbers like this reflect the digital select that has grown since the creation of the computer and more recently, the Information Super Highway called, the Internet. The digital divide describes the issue that some people get to access to and use computers and the Internet while others do not. There are several factors that play into those that do not have access and there are programs that have been created to close the gap between these people and those that have access. Full Text Bridges.org (2003) describes the digital divide as the wide division between those who have access to ICT information and communications technologies and are using it effectively and those who do not. These groups a re labeled the have and the have-nots. As technology increases the importance of having access to it grows also. Those who do not have access to technology lag behind and end up in the gap of the digital divide. Usually the majority of people that fall in the have-nots category are in developing countries around the world, but a large number can be found right in the United States. Several factors seem to play a part in who becomes a victim of the digital divide. These entangle race, socioeconomic status, education, location, age and gender. The statistics for race and access to Internet access in the home show that 46.1% of white households are online and 56.8% of Asian American and Pacific Islanders have access to the Internet in th... ...e Network. (2004). Digital Divide Basics Fact Sheet. Retrieved April 18, 2004 from http//www.digitaldividenetwork.org/content/stories/index.cfm?key=168 6.) Hillebrand, M. (1999). US Government Attempts to Bridge Digital Divide. E-Commerce Time s. Retrieved April 12, 2004 from http//www.ecommercetimes.com/perl/story/1086.html. 7.)Holmes, S. (2000). NMSU undertaking aims to bridge digital divide. Retrieved April 24, 2004 from http//www.amarillonet.com/stories/070600/usn_nmsu.shtml. 8.) PBS.org. (2001). Outreach Activities. Retrieved April 18, 2004 from http//www.pbs.org/digitaldivide/news.html. 9.) Steele-Carrin, S. (2000). Caught in the Digital Divide. Education World. Retrieved April 27, 2004 from http//www.educationworld.com/a_tech/tech041.shtml. 10.) Vail, K. (2003). Next Generation Divide. American School Board Journal, 190, 23-25.

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Disability is a parent in disguise that nurtures and fosters a electric shaver through sometimes crippling, but always meaningful pain. Ones impairment guides him or her to independently to fend for lifes basic necessities. Much like a parent, it is responsible for a persons physical, emotional, and mental development. The novels The Bite of the Mango and A Long Way gone(p) narrate two different childrens traumatic experiences during the Sierra Leones Civil War and its aftermath. In the two books, disabilities are generally perceived as negative. Nevertheless, both autobiographies illustrate how a girls and a boys contrasting disabilities raised them to mature at a younger age without their parents guidance. Both The Bite of the Mango and A Long Way Gone present each suits disabilities however, Kamaras diverse disabilities made her stronger than Beah.Kamaras emotional disability from witnessing inexorable murders has vividnessened her to plant a positive change in the world. B oth characters made a difference in society, but Kamara channeled her strength after seeing, feeling, and earreach pain. Beah physically sees deaths in his own hands from killing others but he is desensitized to murder. Beah is brought up to accept that murdering is a norm and that there is no sympathy in killing people. During the war, he does not have the emotional disability that impaired Kamara. He is unable to rationalize taking innocent lives and therefore, cannot gain moral strengths. In contrast, Kamara is not numbed to this atrocity. Her strength comes from seeing the harsh reality that ignites her desire to change society. Kamara optimistically stated, We had an important purpose to help raise awareness of my countrys problems (Kamara and McC... ...ng Way Gone highlight disabilities in each characters, Kamaras disabilities transformed her into a stronger individual. Beahs emotional, physical, and financial disabilities, are not as greatly underlined as the various disa bilities in Kamaras novel. Beah ignores much of his disabilities through drugs. As a result, many of his internal problems are temporarily painless. Unlike Beah, Kamara felt the sickening pain of the three main disabilities over the course of the war. Kamaras strength is rooted from accepting her flaws in order to move on in life. This is the main reason that makes her strong. As a replacement of parenthood, disabilities in each character had given them strengths to survive on their own. Disability is a like parent in a way that children may temporarily hate it and through the tour realize and accept it and at the end they forgive it.

Industrial Revolution DBQ :: American America History

Industrial Revolution DBQThe impact of the Industrial Revolution was a positive experience for some, but it was a great difficulty for others. Because of the demands for better and protection for puddleers arose, government and unions began to take place. That was how the evils of the Industrial Revolution addressed in England in the eighteenth and nineteenth centuries. Unions are voluntary associations labor unioned by workers. The combination minute of 1800, which hindered the growth of unions, states that every workmans goal, who are entering into any combination should not be obtaining an advance of wages, or to lessen or alter the hours, or influencing any other to quit his work. Any workman who did so shall be committed to jail (Doc 1). Although the Combination Act of 1800 prevented the growth of unions, Ralph Chaplin believes that a worker should join the union. He states that there can be no power greater anywhere beneath the sun, but the unions, which makes it strong (D oc 2). Since theres so many workers working in bad conditions, the labor laws came to action. The Health and Morals Act of 1802 intended children under fourteen from working over twelve hours a day (Doc 3). The factor Act of 1833, which enacted that no person under 18 years of age shall be allowed to work at night in machinery (Doc 4). It allowed the child under 18 to work less than 12 hours a day or less than 69 hours in any one-week. There was a ten hours act, which said that the women or childrens limit workdays are 10 hours. Socialism is one of the roles of government in the economy. Adam Smith, who is the father of capitalism, believes in laissez-faire, hands off the government. He believes all production should be sale at the best possible lowest price. (Doc 5) While Adam Smith believes in capitalism, Engel is criticizing it. Engel believes the capitalism seizes everything for themselves but not the poor, they remain nothing. (Doc 7) Karl Marx, the author of a 23 page pamphle t, The Communist Manifesto, and Engels recommend that all the working men of all countries should unite and is to be equal, should overthrow of all existing brotherly conditions.

We Need Censorship :: Argumentative Persuasive Topics

We Need Censorship     It wont kill us to make limits, but it might if we dont. That is why it is JUSTIFIABLE to limit adults freedom of expression--it is in our, societys, best interests to nourish the children. Lional Tate is just one example of a child gone bad because of the media. Tate mimicked his idol the Rock, killing a six-year old girl by smashing her skull, pulverizing her liver, happy chance her ribs and causing numerous cuts and bruises. If thats not enough of an example what about the teen from New Jersey who simply listened to Ozzy Osbornes Suicide Solution and killed himself? These be not stochastic occurrences, we hear about them on the news frequently. If our freedom of expression is harming kids why cant we fix the problem by not allowing them access to it?   Argument one, People, especially children are very susceptible to being bewitchd by what they watch or see happen throughout their lives.   Monkey see, Monkey do. Everyone ha s heard this phrase sometime in his or her life. This phrase is simple, yet very applicable to todays debate. When a child sees someone or something doing something. They will of course follow suit and imitate the attain being performed. Children do not know any better. Therefore they are innocent and deserve to be respected. It is for these following reasons that we argue for the censorship of harmful materials that could influence a child or children into violent acts, expressions, and other dangerous actions. Through television, video games, and movies, children and teens view countless acts of violence, brutality, and terror as part of entertainment. They become conditioned to associating violence with entertainment. First-person shooter video games develop our childrens skills in operating weapons. The games reward marksmanship, and further reinforce the association of killing with entertainment. In the past, the heroes of movie and television shows were unremar kably people who strictly followed the law. Now, heroes are often people who take the law into their own hands, who see an injustice or evil and seek to rectify it personally, sometimes brutally, regardless of the consequences. Such portrayals signal, to a child, societys approval of that behavior.