Head injury can sometimes result in psychosis afterwards.
Features of psychosis following head injury:
(1) The trauma is usually to the right temporoparietal region.
(2) The onset may be months after the injury.
(3) The patient may suffer hallucinations, delusions and/or agitation.
(4) Many of the patients developed post-traumatic seizures.
(5) The patient often experiences spatioconstructional difficulties.
Other causes of psychosis should be excluded:
(1) substance abuse
(2) pre-existing mental illness
(3) psychological trauma during childhood (vs physical abuse)
