Biological explanations of SZ

A concordance rate is....

• The extent to which people share similar traits

• The extent to which two twins do not share the same characteristics

• The extent to which two twins share the same characteristics

The concordance rate for MZ twins is

• 50%

• 100%

• 17%

• 48%

The concordance rate for DZ twins is

• 12%

• 17%

• 9%

• 1%

Candidate genes are

• genes which may increase a person’s risk of developing schizophrenia and, as there are several of them schizophrenia is referred to as polygenic

• • The genes which may decrease a person’s risk of developing schizophrenia as there are several of them schizophrenia is referred to as polygenetic

• • genes which make someone more likely to develop schizophrenia. There is usually one gene associated with schizophrenia.

The original dopamine hypothesis suggested that...

• There was too much dopamine in the Broca's area

• There was too little dopamine in the broca's area

• There was too much dopamine in the prefrontal cortex

• There was too little dopamine in the prefrontal cortex

Too much dopamine in central areas of the brain is known as

• Hypodopaminergic in the cortex

• Hyperdopaminergic in the head

• Hyperdopaminergic in the cortex​

• Hypodopaminergic in the cortex

The updated dopamine hypothesis suggests that

• There are too much and dopamine in certain areas of the brain e.g. too little Broca's area and too much in the prefrontal cortex

• There are too much and too little dopamine in certain areas of the brain e.g. too little in the prefrontal cortex and too much in the Broca's area

Too much dopamine in the Broca's area has been linked to the positive symptom of

(a)  

Too little dopamine in the prefrontal cortex has been linked to the negative symptom of

(a)