Biological explanations for schizophrenia

Researchers once believed there was a single gene responsible for schizophrenia. This gene was called the (a)   .

Researchers have uncovered clear evidence that schizophrenia has a genetic basis, but instead of finding a single gene, researchers have identified a large number of (a)   genes for schizophrenia.

(a)   describes a situation in which neurons in a part of the brain demonstrate excessive activity.

The dopamine hypothesis was intended to explain which symptoms of schizophrenia?

• Delusions

• Avolition

• Speech poverty

• Hallucinations

Answer explanation

All positive symptoms

If schizophrenia has many candidate genes, then this means it is (a)   .

Neurons that communicate through the exchange of dopamine are called (a)   neurons.

The researcher who hypothesised the existence of a schizogene was called (a)   .

A crucial candidate gene is the (a)   gene.

Which symptoms of schizophrenia were NOT explained by the original dopamine hypothesis?

• Delusions

• Speech poverty

• Avolition

• Hallucinations

Schizophrenic patients experiencing ___________ ___________ often have reduced activity in the superior temporal gyrus. This region may be responsible for the identification of inner speech.

(a)