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Related Experiment Videos

Disturbance of cage-finding in the monkey.

M Sugishita, G Ettlinger, R M Ridley

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |September 1, 1978
    PubMed
    Summary
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    Damage to specific brain areas (Brodmann areas 5 and 7) impaired monkeys' ability to navigate. Monkeys showed slower movement in darkness and abnormal behavior in light conditions.

    Area of Science:

    • Neuroscience
    • Primate Behavior
    • Sensory Processing

    Background:

    • Brodmann areas 5 and 7 are implicated in sensorimotor integration and spatial processing.
    • Understanding the role of these areas is crucial for comprehending navigation and spatial awareness.

    Purpose of the Study:

    • To investigate the functional role of Brodmann areas 5 and 7 in spatial navigation.
    • To assess the impact of unilateral or bilateral lesions in these areas on visually guided and dark navigation.

    Main Methods:

    • Performed unilateral or bilateral ablations of Brodmann areas 5 and 7 in two macaque monkeys.
    • Observed and quantitatively measured navigation performance during return to home cage tasks.
    • Conducted tasks under both light and dark conditions to evaluate visual dependence.

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    Main Results:

    • Lesioned monkeys exhibited significantly slower movement speeds in the dark compared to light conditions.
    • Qualitative behavioral abnormalities were observed even in the light, suggesting broader deficits.
    • Both unilateral and bilateral removals impaired navigation, with varying degrees of severity.

    Conclusions:

    • Brodmann areas 5 and 7 are critical for effective spatial navigation in primates.
    • These areas play a role in both visually dependent and independent orientation.
    • Damage to these regions results in both quantitative (speed) and qualitative (behavioral) deficits in navigation.