One Or More Biological Explanation

Outline and Evaluate one or more biological explanation of Schizophrenia (25 marks) The biological approach assumes that Schizophrenia is caused by genetic predisposition and/or chemical imbalances. The dopamine shooting suggests that dopamine over- exertion causes Schizophrenia. Wise & Stein (1973) proposed that a drop of the enzyme that converts dopamine to noradrenaline causes Schizophrenia. This results in too much dopamine and non enough norepinephrine. This is a believable theory because norepinephrine is air current in the brains reward system; so low levels of norepinephrine in the reward centre of the hypothalamus may lead to a malfunctioning of the reinforcement system, which could identify for symptoms of Anhedonia. Anhedonia is the inability to feel pleasure from activities or events that normally cause pleasure. More evidence in support of this model comes from findings that catecholamine, such as dopamine and norepinephrine, footprint up certain cog nitive functions. For example, Foote et al., (1975) found that application of norepinephrine to the cells in the auditory cortex of squirrel monkeys increased the rate of freeing of excitant specific cells (neurons that are firing in reaction to a real sound) relative to minimise cell activity.

This could count on for the auditory hallucinations experienced by those with Schizophrenia as they may be failing to discriminate between external stimuli and the background activity of their brain. A problem with this theory is that it does not rationalize wherefore symptoms improve only gradually when a longanimous is vic torious appropriate medication, although the! se drugs have an immediate effect on dopamine levels in the brain. Therefore this fuel immoral that dopamine is not the ONLYY cause and as a result this can mean that this theory is seen as reductionist. It can also be seen as simplistic as it does not take into account of the serotonin and noradrenalin. And lastly it is only a correlational oeuvre and so it only shows us...If you want to get a wide of the mark essay, prepare it on our website: OrderCustomPaper.com

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