Biological explanations for schizophrenia

1. There is a question about whether unusual activity in the brain causes schiz, or is caused by schiz. This can be explained as a ...... ................ problem (11, 9)
6. What neurotransmitter is widely believed to be involved in schizophrenia? (8)
7. What area of the brain is involved in anticipation of reward, and loss of motivation in schiz may be explained by low levels in this area? (7, 8)
8. What study showed that children of people with schizophrenia are still at a heightened reisk of schiz, if moved to a family without a history of schiz? (8)
9. If identical twins only have a 50% chance of developing risk if one has it, what else could be involved? (11)

2. What hypothesis for schiz is believed to be because of too high levels or activiy of dopamine in thesubcortex? (17)
3. What other neurotransmitter may be involved in schiz (candidate genes have coding for this neurotransmitter)? (9)
4. Existence of different candidate genes indicates that each individual gene confers a small increased reisk of schizophrenia, which is known as? (11)
5. Who found that MZ twins have a 48% shared risk of schizophrenia, DZ twins have a 17% of shared risk? (9)
10. What hypothesis for schiz is believed to be because there are too low levels of dopamine in the prefrontal cortex? (16)

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