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Related Experiment Videos

A schizophreniform behavioral psychosis mediated by dopamine.

D L Garver1, R F Schlemmer, J W Maas

  • 1Illinois State Psychiatric Institute, Chicago 60612.

The American Journal of Psychiatry
|January 1, 1975
PubMed
Summary

Chronic d-amphetamine administration induced schizophrenic-like behaviors in macaques. Dopamine systems were identified as key mediators of these drug-induced psychotic-like behaviors.

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Area of Science:

  • Neuroscience
  • Psychopharmacology
  • Primate Behavior

Background:

  • Schizophrenia is a complex mental disorder with poorly understood etiological factors.
  • Animal models are crucial for investigating the neurobiological underpinnings of psychiatric conditions.
  • d-amphetamine is a stimulant known to induce behavioral changes.

Purpose of the Study:

  • To investigate the effects of chronic d-amphetamine administration on social behavior in macaques.
  • To characterize the specific behavioral disturbances induced by d-amphetamine.
  • To explore the neurochemical mediation of these drug-induced behaviors.

Main Methods:

  • Chronic administration of d-amphetamine to a macaque social colony.
  • Detailed behavioral observation and recording of induced disturbances.

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  • Pharmacological dissection of the induced syndrome using specific neuroleptic agents.

    • Main Results:

    • d-amphetamine induced hypervigilance, hyperactivity, fragmented behaviors, social withdrawal, and stereotypies.
    • The induced behavioral syndrome showed similarities to human schizophrenic disturbances.
    • Pharmacological interventions provided insights into the underlying neurochemical systems.

    Conclusions:

    • The study demonstrates that chronic d-amphetamine reliably induces a complex behavioral syndrome in macaques.
    • The findings strongly implicate dopamine systems in mediating the major elements of these induced psychotic-like behaviors.
    • This macaque model offers a valuable tool for studying the neurobiology of schizophrenia and related disorders.