In a few extreme cases, brain injury or disease has led to major changes in an individual‘s personality and behaviour, including criminality
There is some correlation between abnormal EEG readings- which measures brainwave activity and psychotic criminality.
Prisoners are more likely than non-prisoners to have brain injury.
Brain Injuries and Disorder:
Limitations:
Crimes caused by brain injury of disease are rare. The sufferer‘s original personality is more important in whether the engage in crime.
It is not clear that abnormal brainwave activity causes psychopathic criminality. Some psychopaths have normal EEG patterns and some normal people have abnormal EEG patterns.
Prisoners’ higher likelihood of brain injury could be a result of their criminality (e.g. getting into fights), rather than cause of it.