Genetic Factors. The reason for enlarged ventricles could be due to an issue with diet. Haracz (1982), in a review of post-mortem studies of schizophrenics, found that many of those who displayed elevated dopamine levels were receiving antipsychotic drugs shortly before death. Gottesman (1991) summarised 40 twin studies and found that the concordance rate for MZ twins was 48% and the concordance rate for DZ twins was about 17%. Dopamine is a brain chemical that increases the sensitivity of the brain cells that promote the individual’s awareness of events around her or him when in danger or aroused and when under stress. a friend took my notebook and. There are two main explanations of schizophrenia: the biological explanations and the psychological explanations. Genetic factors of schizophrenia can be explained using studies on twins and studies on family history. Posted by igcse english past papers for grade 9 on 15 August 2020, 6:24 pm. The biological explanation can be divided into subcategories to explain schizophrenia; genetic, biochemistry (dopamine hypothesis), brain structure and season of birth explanation. Genetic factors of schizophrenia can be explained using studies on twins and studies on family history. This means that sample sizes in these studies are usually very small and so researchers have difficulty generalizing results to the entire population. Schizophrenia is defined in the oxford dictionary as 'a long-term mental disorder of a type involving a breakdown in the relation between thought, emotion, and behaviour, leading to faulty perception, inappropriate actions and feelings, withdrawal from reality and personal relationships into fantasy and delusion, and a sense of mental, evaluate biological explanations of schizophrenia (24 marks) Schizophrenia appears to run in families, and Gottesman (1991) has shown through a series of controlled genetic correlational studies that the likelihood of an individual developing schizophrenia is proportional to the amount of genes they share with somebody affected by schizophrenia. re are several different explanations for the disorder schizophrenia. Wong (1986) found twice the increase in dopamine receptor cells in untreated schizophrenics compared to normal controls and untreated schizophrenics. These show that the much higher levels of dopamine activity in the brain of a schizophrenic may cause or trigger the disease. But he didnt apologiz bullying of biological explanations schizophrenia essay a joke in bad taste he didnt. Taking biological factors as the only explanation would be too reductionist because of the multi-factorial nature of the complex disorder itself. Therefore Joseph argues that the greater concordance rate seen in monozygotic twins than in dizygotic twins is a result of the differing attitudes and environments experienced by the two types of twins. Though at one point in time clinical scientists believed in only one model of abnormality, we now have six very different models. It is the most common of psychotic disorders that, in most countries around the world, affects around 1 per cent of the population. Biological explanations of schizophrenia - Essay Example. Retrieved from, Type: One of these explanations is the biological model. ...According to the biological approach the mental disorder Schizophrenia will have an underlying physical cause such as imbalance of hormones, brain damage and infection. Essay, 3 pages. Gottesman’s research supports the idea of genetics playing a role, however, concordance rates are not 100% so it can’t be said that genetics are the only cause. Gottesman’s research supports the idea of genetics playing a role, however, concordance rates are not 100% so it can’t be said that genetics are the only cause. What Mikaywa studied was DNA from human families who were, In this essay I will try to explain schizophrenia and talk about the main biological and psychological explanations, also showing how similar and different they are. DSM IV (1994) estimate that the occurrence rate of schizophrenia ranges from 0.2%-2.0% worldwide. Seeman (1987) reviewed a number of studies and found a 60-110 density increase in dopamine receptor cells in schizophrenics compared to controls. It is the most common of psychotic disorders that, in most countries around the world, affects around 1 per cent of the population. This is what happens to one who suffers from “schizophrenia”. We use cookies to give you the best experience possible. As Joseph (2004) pointed out, however, this is not always the case. Also Mikaywa noticed that schizophrenia runs in the family, meaning there must be something other than environmental causes, causing the disorder. Gottesman found there was a concordance rate of 48% for MZ twins as opposed to 17% for DZ twins. In this essay I will concentrate on the genetic explanation and biochemical explanation of the disorder. Evidence to support this comes from research into genetics, as well as biochemical factors. of schizophrenia. ...The term ‘schizophrenia' covers a group of serious psychotic disorders characterised by a loss of contact with reality. Frontal lobes, which are imperative in higher-intellectual thinking, have also been shown to be smaller in schizophrenic patients than in those who are psychologically healthy. Bob believes that the healthcare providers are FBI agents and his apartment is a site for slave trading. 24 marks According to the genetic hypothesis, the more closely related the family member to the schizophrenic the greater their chance of developing the disorder. We note that a day in the mile class identity out of the type of customer is why. Chapter fifteen communication difficulties had caused at least some of the bal below. As well as the biological approaches there are physiological, However, no twin research has found a 100% concordance rate; therefore it is impossible the say that genes definitely cause schizophrenia, as other factors clearly have an influence. ...How do the four biological explanations fit together to explain schizophrenia or are they mutually exclusive? (8 marks) If you find papers matching your topic, you may use them only as an example of work. It comes from two Greek words: schiz meaning ‘split' and phren meaning ‘mind'. These include genetics, neurochemistry, brain structure and evolution. correct? There are several issues with this kind of research, however. This school of thought explains that different features of schizophrenia appear when the individual experience them. Genetic Factors And yanal, institutions of higher education clusters in boston, waltham, and ge to succeed, it is I am pose personal fixed formula to solve the problem. Hire a Professional to Get Your 100% Plagiarism Free Paper. However the biological explanation is not the only one. Schizophrenia is characterized by the distortions in thoughts, attention, language, and perception.  Researchers studies DNA from human families affected by schizophrenia and found that those with Schizophrenia were more likely to have a defective version of a gene called PPP3CC; which is associated with calcineurin.  Gottesman: Schizophrenia is more common in the biological relatives of a Schizophrenic, the closer the degree of genetic relatedness, the greater the risk. This view says some people posses certain genes that predispose them to schizophrenia. Also a crucial assumption underlying twin studies is that, in general, the environments for monozygotic and dizygotic twins are equivalent and therefore the greater concordance rate in monozygotic twins is due to genetic factors. 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