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SCHIZOPHRENIA - EXPLANATIONS

Biological: (only two needed)

Biochemistry - excess dopamine (neurotransmitter) in the brain. Messages from neurons
transmitting dopamine fire too easily, often affects perception and attention in SZ people.
GRILLY (2002) analysed Parkinson sufferers that took the drug L-Dopa to raise dopamine
levels, then developed SZ type symptoms.…

Page 2

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SCHIZOPHRENIA - EXPLANATIONS

Psychological: (only two needed)

Cognitive - disturbed thinking processes are the cause rather than the consequence of SZ.
HEMSLEY (1993) suggests the main issue in SZ is a breakdown in relationship between info
that has already been stored and new, incoming sensory info (failure to activate
schemas).…

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