There are two main biological theories which explain the assumed causes of schizophrenia: Genetic and Dopamine Hypothesis. Research by Mikaywa et al has found that there must be a genetic explanation of schizophrenia due to the fact that concordance rates for environmental causes are not 100%. Also Mikaywa noticed that schizophrenia runs in the family‚ meaning there must be something other than environmental causes‚ causing the disorder. What Mikaywa studied was DNA from human families who were
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How do the four biological explanations fit together to explain schizophrenia or are they mutually exclusive? The biological explanation can be divided into subcategories to explain schizophrenia; genetic‚ biochemistry (dopamine hypothesis)‚ brain structure and season of birth explanation. Firstly there’s genetics. This view says some people posses certain genes that predispose them to schizophrenia. However‚ if schizophrenia was totally and always inherited then concordance rates between MZ
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Outline and evaluate biological explanations for schizophrenia (8+16marks). It has been showed that schizophrenia has a tendency to run in different families. This implies that genes play a role. The closer the genetic relationship the more likely the people are to share the disorder. Gottesman (1991) showed that when both parents are schizophrenic‚ there is a 46% chance of the child also getting it‚ however‚ if only one parent had it‚ it dropped to 16% and dropped to a further 1% when the sibling
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Schizophrenia is a psychotic disorder in which a persons personal‚ social‚ and occupational functioning in normal life deteriorates to unusual perceptions‚ odd thoughts‚ disturbed emotions‚ and motor abnormalities. A person struggling with schizophrenia will lose contact with reality and begin to lose the ability to function at home‚ school‚ or work. Individuals may also suffer from hallucinations and or delusions. There are three main categories of symptoms for schizophrenia: positive symptoms
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The term schizophrenia’ covers a group of serious psychotic disorders characterised by a loss of contact with reality. It comes from two Greek words: schiz meaning split’ and phren meaning mind’. DSM IV (1994) estimate that the occurrence rate of schizophrenia ranges from 0.2%-2.0% worldwide. There are two main explanations of schizophrenia: the biological explanations and the psychological explanations. In this essay I will critically consider the biological explanations. These include genetics
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Outline and Evaluate Biological Treatments for Schizophrenia. The meaning of Schizophrenia is the loss of contact with reality also known as split-mind. It shouldn’t be thought of as one disorder as there are several sub-types such as; paranoia‚ catatonic‚ disorganised‚ and undifferentiated; they all have different symptoms. It is a disorder which is estimated at 1% of the population and is more common in males‚ lower social classes and African-Caribbean’s living in the U.K. Schizophrenia is characterised
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Outline and evaluate psychological explanations for schizophrenia (24) One psychological explanation of SZ was put forward by Bateson et al (1956) who looked at childhood as a base for developing SZ‚ for example the interactions children have with their mothers. His explanation‚ the Double Bind theory‚ states that schizophrenia can occur due to conflicting messages given from parents to their children‚ for example when a parent expresses care but does so in a critical way. This means that the child
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Outline and evaluate psychological explanations of schizophrenia (24 marks) Brown and Birley studied stressful life events in the role of relapse in schizophrenics. They found that 50% of people experience a stressful life event e.g. death‚ relationship break-up‚ job loss etc. in the 3 weeks prior to a schizophrenic episode. A control sample reported a low and unchanging level of stressful life events over the same period. However not all evidence supports the role of life events. For example‚
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Describe two explanations of schizophrenia and evaluate these explanations (9 and 16 marks) Two explanations of schizophrenia are the biological perspective and the psychological perspective. The biological perspective involves genetic factors that influence schizophrenia‚ however the psychological perspective involves environmental factors in which you learn the behaviour of a schizophrenic. The first explanation is the biological perspective‚ it has two subtypes‚ these are biochemical and
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Outline and evaluate the biological explanation of depression. Biological explanation of depression can be explained by neurotransmitter dysfunction. Neurotransmitters such as noradrenalin and serotonin have been shown to be linked with depression. Bunney at al (1965) found that there was low levels of noradrenaline function in the brain of depressed individuals. Also‚ post mortem studies found increased noradrenaline receptors in the brains of depressed suicide victims. When there is low noradrenaline
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