Biological explanations for schizophrenia

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

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 ________ genes for schizophrenia.

__________ 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 _________.

Neurons that communicate through the exchange of dopamine are called _____________ neurons.

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

A crucial candidate gene is the ________ 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.