Schizophrenia: Biological explanation

Question 1

Genetic factors

Answer 1

Genetics which predispose the disorder can be passed on through generations

(+) Twin studies showed concordance rate was almost at half / 50% - suggests genetics play a role

(-) other 50% can be influenced by other factors

(+) concordance rate not affected in households where twins are separated

Question 2

Biochemical factors e.g hormones, neurotransmitters

Answer 2

pet scans show that dopamine levels are too high in schizophrenic brains

(+) anti-psychotic drugs block dopamine receptors and pills that increase dopamine function leads to schizophrenic-like symptoms

Question 3

Neurological factors

Answer 3

MRI scans - abnormalities in prefrontal cortex can cause schizophrenia