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Abnormal lateralization in finger tapping and overt aggressive behavior

M Hillbrand1, S J Sokol, B M Waite

  • 1Whiting Forensic Institute, Laboratory of Neuropsychology, Middletown, Connecticut.

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|May 1, 1993
PubMed
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Abnormal brain lateralization in psychiatric patients is not directly linked to aggressive behavior. Instead, factors like seizures and substance abuse appear to influence this relationship.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Behavioral Science

Background:

  • Abnormal cerebral lateralization has been hypothesized to correlate with aggressive behavior.
  • Understanding this link is crucial for psychiatric patient management.

Purpose of the Study:

  • To investigate the relationship between abnormal cerebral lateralization and overt aggressive behavior in violent psychiatric patients.
  • To determine if factors like age, IQ, or substance abuse mediate this potential relationship.

Main Methods:

  • Assessed cerebral lateralization using the Finger Oscillation Test (Halstead-Reitan Neuropsychological Battery).
  • Measured aggressive behavior over six months using the Overt Aggression Scale in 41 patients.
  • Employed analysis of covariance to control for confounding variables.

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Main Results:

  • Patients with abnormal lateralization patterns showed higher aggression frequency and severity.
  • This association was not explained by age, race, IQ, head trauma, brain damage, or diagnosis.
  • Seizures, alcohol abuse, and drug abuse acted as intervening variables, nullifying the direct link.

Conclusions:

  • The study suggests abnormal cerebral lateralization is unlikely to be a direct cause of aggressive behavior.
  • Intervening variables such as substance abuse and seizure history play a significant role in the observed association.
  • Further research should focus on these mediating factors in understanding aggression in psychiatric populations.