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Parietal laterality and violence

J M Andrew

    The International Journal of Neuroscience
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Poorer right-parietal lobe function in juvenile offenders is linked to increased violent behavior. This suggests potential cerebral dysfunction may underlie aggressive tendencies and dyscontrol.

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    Area of Science:

    • Neuroscience
    • Criminology
    • Developmental Psychology

    Background:

    • Understanding the neurobiological underpinnings of violent behavior is crucial for developing effective interventions.
    • Parietal lobe functioning and its lateralization are increasingly recognized as potential factors in behavioral regulation.

    Purpose of the Study:

    • To investigate the relationship between parietal lobe cerebral functioning laterality and a history of violent behavior in juvenile offenders.
    • To explore whether specific patterns of parietal lobe activity correlate with the severity of past criminal violence.

    Main Methods:

    • A sample of 33 right-handed juvenile offenders (male and female) were divided into less and more violent groups.
    • Participants performed the Weighs Test, with a lateralization index (left-hand score / right-hand score) calculated.

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  • Statistical corrections were applied for sex and age differences; ethnicity was not a significant factor.

    • Main Results:

    • A positive correlation was found between poorer right-parietal function and the level of violence in past crimes.
    • Left-parietal function showed a comparatively better performance in relation to violent behavior.
    • Replication with an additional 18 subjects confirmed these findings.

    Conclusions:

    • The study supports the hypothesis that impaired right-parietal lobe function is associated with increased violent behavior in juveniles.
    • The concept of cerebral 'area-appropriateness' suggests that reduced function in task-appropriate areas may indicate a dysfunction related to 'dyscontrol' and violence.
    • These findings highlight the potential role of parietal lobe laterality in the neurobiology of violent behavior.