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Neurologic abnormalities in murderers

P Y Blake1, J H Pincus, C Buckner

  • 1Department of Neurology, Georgetown University Medical Center, Washington, DC 20007, USA.

Neurology
|September 1, 1995
PubMed
Summary

Neurologic abnormalities, including frontal lobe dysfunction and brain abnormalities, were common in incarcerated individuals. These findings, combined with abuse histories, may contribute to violent behavior.

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Area of Science:

  • Neuroscience
  • Forensic Psychology
  • Clinical Neurology

Background:

  • Individuals involved in the legal system often present complex neurocognitive and psychiatric profiles.
  • Understanding the neurological underpinnings of behavior in this population is crucial for legal and therapeutic contexts.

Purpose of the Study:

  • To investigate the prevalence of neurological and neuropsychological abnormalities in individuals awaiting trial or sentencing for murder.
  • To explore potential correlations between brain dysfunction, psychiatric diagnoses, history of abuse, and violent behavior.

Main Methods:

  • Neurologic examinations, electroencephalography (EEG), magnetic resonance imaging (MRI) or computed tomography (CT) scans, and neuropsychological testing were performed.
  • Psychiatric diagnoses and histories of physical and sexual abuse were documented.

Main Results:

  • Frontal lobe dysfunction was identified in 64.5% of subjects, with temporal lobe abnormalities in 29%.
  • All tested subjects exhibited neuropsychological abnormalities. EEG abnormalities were found in 40% and MRI/CT abnormalities in 47% of those tested.
  • A history of severe physical abuse was reported by 83.8% and sexual abuse by 32.3%.

Conclusions:

  • Neurologic and neuropsychological deficits are prevalent in individuals accused of murder.
  • The interaction between severe physical abuse, paranoia, and neurologic brain dysfunction likely contributes to violent behavior.

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