Biological explanation of dysfunctional behaviour
- Created on: 30-05-16 11:55
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- Biological explanation of DB
- Genes
- May inherit predispostionfor DBs
- Involves them having a gene but it is not 'switched on' - external factors trigger it
- For example, depression gene gets switched on by bullying
- Those with the DRD4 gene are more likely to be diagnosed with schizophrenia
- Known as 'epti-genetics'
- For example, depression gene gets switched on by bullying
- Known as 'epti-genetics'
- Involves them having a gene but it is not 'switched on' - external factors trigger it
- May inherit predispostionfor DBs
- Neurotransmitters
- Chemical messengers that transmit signals from a neuron to a target cell across a synapse
- Serotonin and norepinephrine are related to depression - they have lower levels of these neurotransmitters
- Anxiety linked to noradrenaline
- Dopamine and GABA linked to schizophrenia
- Parkinson's research - a drug used to increase dopamine levels brought out schizophrenic-symptoms in non-schizophrenics
- Led to the discovery that schizophrenics have higher dopamine levels
- Parkinson's research - a drug used to increase dopamine levels brought out schizophrenic-symptoms in non-schizophrenics
- Chemical messengers that transmit signals from a neuron to a target cell across a synapse
- Brain anomalies
- Schizophrenics have larger ventricles in their brains - causes DB
- Disorders such as schizophrenia are caused by viral infections in the growing foetus
- More likely to occur during the winter months
- Gottesman and Shields
- Aim: review research on twin, family and adoption studies for a genetic cause of schizophrenia
- Method: review article of 3 adoption and 5 twin studies
- Procedure: comparing biological parents and siblings with adoptive
- In twin studies, concordance rate was compared for monozygotic and dizygotic
- Findings: children with an adoptive parent with schizophrenia did not develop it
- Findings 2: In twins, MZ concordance rate was 58% and DZ was 12%
- Conclusion: More closely related you are to someone with schizophrenia, the more likely you are to develop it
- Findings 2: In twins, MZ concordance rate was 58% and DZ was 12%
- Findings: children with an adoptive parent with schizophrenia did not develop it
- In twin studies, concordance rate was compared for monozygotic and dizygotic
- Procedure: comparing biological parents and siblings with adoptive
- Method: review article of 3 adoption and 5 twin studies
- Aim: review research on twin, family and adoption studies for a genetic cause of schizophrenia
- Genes
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