biological explanations for schizophrenia: ventricles

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Psychopathology (schizophrenia)
Biological explanations of schizophrenia: enlarged ventricles
Describe (AO1)
There is evidence from MRI scans and autopsies that schizophrenia may have been
caused by having enlarged ventricles in the brain. It is thought that negative
symptoms could be caused by brain damage. Type 2 schizophrenics (more negative
than positive symptoms) have larger ventricles and hence smaller amounts of brain
cells and frontal lobes. Reduced brain matter may be responsible for lack of
functioning.
Evaluation (AO2)
Correlational evidence: the evidence supporting the enlarged ventricles
is only linked to the negative symptoms of schizophrenia. This suggests that
the enlarged ventricles aren't the cause of the negative symptoms of
schizophrenia.
Antipsychotics: these have been known to destroy brain cells leading to
larger ventricles. Therefore schizophrenia may not be caused by large
ventricles but the large ventricles are actually caused by drugs.

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