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Related Experiment Videos

Primate phonation: unilateral and bilateral cingulate lesion effects

D Sutton, R E Trachy, R C Lindeman

    Behavioural Brain Research
    |July 1, 1981
    PubMed
    Summary

    Anterior cingulate cortex damage impairs vocalization initiation in rhesus monkeys, revealing lateral asymmetry in vocal control mechanisms. This suggests a link between vocalization and the hemisphere controlling hand preference.

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    Area of Science:

    • Neuroscience
    • Primate Behavior
    • Cognitive Science

    Background:

    • The anterior cingulate cortex (ACC) is implicated in various cognitive functions, including vocalization.
    • Lateralization of brain function is well-established, but its role in primate vocal control is less understood.

    Purpose of the Study:

    • To investigate the role of the anterior cingulate gyrus in discriminative vocalization and lever press tasks in Macaca mulatta.
    • To determine if lesions to the anterior cingulate cortex result in behavioral deficits and if these deficits show lateral asymmetry.

    Main Methods:

    • Four juvenile Macaca mulatta were trained on discriminative vocalization and lever press tasks.
    • Sequential unilateral and bilateral lesions of the anterior cingulate gyrus were performed, with behavioral testing at each stage.

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  • Performance was assessed using measures like total responses, latency, efficiency, and error index.

    • Main Results:

    • Unilateral anterior cingulate lesions significantly impaired vocal response initiation (total responses and latency) in one monkey, but not the others, indicating lateral asymmetry.
    • Discriminative lever press performance was unaffected by unilateral lesions in any of the monkeys.
    • Bilateral lesions exacerbated vocal deficits in previously unaffected monkeys, bringing their performance closer to that of the unilaterally lesioned monkey.

    Conclusions:

    • The anterior cingulate cortex plays a critical role in the initiation of vocal responses.
    • Evidence suggests lateral asymmetry in the neural control of vocalization involving the anterior cingulate cortex.
    • This asymmetry may be related to the hemisphere controlling the preferred hand, highlighting a potential link between motor control and vocalization lateralization.