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Related Experiment Videos

Locomotor hyperactivity in PCB-exposed rhesus monkeys.

R E Bowman, M P Heironimus, D A Barsotti

    Neurotoxicology
    |October 1, 1981
    PubMed
    Summary

    Polychlorinated biphenyls (PCBs) exposure in rhesus monkeys increased locomotor activity, with altered activity patterns observed even after exposure ceased. PCB effects on behavior were qualitative rather than dose-dependent.

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    Neuroscience·2002

    Area of Science:

    • Neurotoxicology
    • Developmental Toxicology
    • Primate Behavior

    Background:

    • Polychlorinated biphenyls (PCBs) are persistent environmental pollutants with known neurotoxic effects.
    • Developmental exposure to PCBs can lead to long-term behavioral alterations.
    • Rhesus monkeys are a relevant model for studying human developmental neurotoxicity.

    Purpose of the Study:

    • To investigate the effects of developmental polychlorinated biphenyl (PCB) exposure on locomotor activity in young rhesus monkeys.
    • To determine if PCB-induced behavioral changes persist after exposure cessation.
    • To explore potential dose-response relationships and qualitative differences in activity patterns.

    Main Methods:

    • Young rhesus monkeys (M. mulatta) were exposed to low levels of PCBs (Aroclor 1248) prenatally and postnatally.
    • Locomotor activity was measured using a crossed photobeam cage.
    • Concurrent and post-exposure groups were compared to control groups at various ages (6 and 12 months).

    Main Results:

    • All PCB-exposed groups exhibited significantly higher locomotor activity than controls.
    • Altered activity patterns, including increased activity over sessions, were observed in concurrent and post-exposure groups.
    • Qualitative differences in activity patterns emerged, not clearly related to PCB dosage.

    Conclusions:

    • Developmental PCB exposure significantly alters locomotor activity in rhesus monkeys.
    • Behavioral effects can persist even after the cessation of PCB exposure.
    • PCB neurotoxicity manifests in altered activity patterns, suggesting complex, non-linear dose-effect relationships.

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