Biological Explanations for Schizophrenia.
There are several different explanations for the disorder schizophrenia. One of these explanations is the biological model. This model explains schizophrenia through biological faults, for example viral infections and brain abnormalities.
Genetic Factors Some psychologists say that schizophrenia can be passed down generations, meaning that some people inherit the disorder from their parents. Twin research has consistently shown that identical twins have a greater risk of developing schizophrenia, if their twin has the disorder, than non-identical twins.
Evaluation of Genetic Factors This research shows that there is a definite correlation between genetics and the risk Biological explanations of schizophrenia developing schizophrenia. Also, some psychologists argue that the high concordance rates found could be caused by being brought up in a family with a schizophrenic, so the child mimics the schizophrenic behaviour, rather than by genetics.
The Dopamine Hypothesis The dopamine hypothesis says that schizophrenia is caused by an increased reaction to dopamine in the brain.
This could be because there is too much of the hormone dopamine in the brain, or conversely because there is an abnormally high number of dopamine receptors in the brain.
This model says the excess sensitivity to dopamine results in the brain causes the symptoms of schizophrenia. Evaluation of the Dopamine Hypothesis Autopsies have found an unusually high number of dopamine receptors in the brain of schizophrenics Owen et al,however, this evidence is varied and inconclusive.
This suggests the increase in dopamine could result in schizophrenia. Problems with this explanation There are problems of the dopamine hypothesis. This suggests something else must cause schizophrenia as well; otherwise the drugs would help all the patients.
Brain dysfunction Using brain imaging techniques, such as P. Some psychologists believe that the increase in the size of these ventricles is what leads to the schizophrenic symptoms.
Research by Meyer-Lindenberg found that reduced activity of the prefrontal cortex is linked to dopamine abnormalities. This could provide an explanation of why brain dysfunction could cause schizophrenia, not show a correlation.
Viral Infection Some researchers suggest that brain abnormalities that lead to schizophrenia could be caused by viral infection.
For example, contracting diseases such as Flu or Syphilis in the womb may relate to developing schizophrenia in later life. Evaluation of Viral Theory Torrey found that more schizophrenics are born in the winter, when it is cold and exposure to viruses is higher, than in other months.
Although this link is only correlational it suggests viruses do affect the chance of developing schizophrenia.Four biological explanations of schizophrenia are genetic factors, biochemical imbalance, brain structural abnormality, and evolutionary factors. These four factors are likely to be related.
For example, evolutionary pressures have shaped the genes that we have inherited and our biochemical systems. Biological Explanation of Schizophrenia - Genetics - Genetics Gottesman () - Established that Schizophrenia is more common among biological relatives of a person with Schizophrenia.
Jan 02, · There are several different explanations for the disorder schizophrenia. One of these explanations is the biological model. This model explains schizophrenia through biological faults, for example viral infections and brain abnormalities.
Genetic Factors Some psychologists say that schizophrenia can be passed down generations, . Explanations of Schizophrenia No single cause has been identified, biological, behavioural and social research suggests a complex interplay between factors.
For example, people might have an inherited tendency towards schizophrenia that is triggered by environmental circumstances.
Schizophrenia Revision Notes. by Bruce Johnson, published WHAT YOU NEED TO KNOW Diagnosis and Classification of Schizophrenia. Biological Explanations for Schizophrenia.
Psychological Explanations for Schizophrenia. Biological Treatment: Drug Therapy. Psychological Therapies: Family Therapy, Token Economies and Cognitive Author: Bruce Johnson. Describe and evaluate biological explanations of schizophrenia (24 marks) Schizophrenia is a psychotic disorder characterized by distorted thinking, impaired emotional responses, poor interpersonal skills and a distortion of reality.