Schizophrenia- One Biological Explanation

Schizophrenia depends in part on genetic factors, the musical theme that schizophrenia tends to run in families. Family studies have been carried out and Kendler (1985) suggested first-year degree relatives are eighteen times more(prenominal) plausibly to develop schizophrenia if a family member has it. Kety (1962) began a long study of Danish families where a first degree had a diagnosis of schizophrenia such as the mother. 207 children with insane mothers were introduce and matched a control separate of 104 children with non-schizophrenic mothers. 16% of the schizophrenic group demonstrable the illness, compared to only 2% of non-schizophrenic group. These percentages are significant as they imply there is a genetic link.
To attain more support for the biological explanation, researchers looked at twin studies, to establish the fortune that the other twin is also schizophrenic. Gottesman and Schields (1982) studied development of monozygotic twins where one had developed schizophrenia. They plant a 58% capital of New Hampshire rate. Support was given by Cardno (1999) who found that the concordance rate is about 40% if you have a monozygotic twin, but only 5% if you have a dizygous twin with schizophrenia.




Tienari (1987) looked at adoptive families in Finland, and matched 112 adopted children who had a schizophrenic mother, with 135 who did not have a schizophrenic mother. All of the children had been adopted before the age of 4. He found that there was a large difference in the incidence of schizophrenia in these two groups when they were adults: 7% of those with schizophrenic mothers had developed the illness, compared with only 1.5% of those without schizophrenic mothers.

However, such biological explanations are field of battle to a number of criticisms. While Kety et als findings step up to support the importance of genetic factors in schizophrenia, it is worth noting that these statistics were self-possessed from a time-span of over 70 years and these earlier interpretations of symptoms were...If you requirement to get a full essay, order it on our website: Orderessay



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