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Related Experiment Videos

The neostriatum viewed orthogonally.

I Divac

    Ciba Foundation Symposium
    |January 1, 1984
    PubMed
    Summary

    The forebrain

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    Area of Science:

    • Neuroscience
    • Cognitive Neuroscience
    • Neuroanatomy

    Background:

    • The neostriatum, a key forebrain structure, plays a crucial role in motor control and cognitive functions.
    • Understanding the functional organization of the neostriatum is essential for deciphering complex brain processes.

    Purpose of the Study:

    • To investigate the functional heterogeneity and regional specialization within the neostriatum.
    • To explore the role of cortico-neostriatal connections in mediating specific behaviors.
    • To propose a systems-level model of forebrain organization.

    Main Methods:

    • Anatomical tracing techniques to identify cortico-neostriatal connections.
    • Neurobehavioral experiments to assess the effects of lesions on cognitive and motor functions.
    • 2-deoxyglucose uptake studies to map regional brain activity.

    Main Results:

    • Evidence for functional heterogeneity in the neostriatum, with distinct regions mediating different responses.
    • Regional specialization is linked to selective cortico-neostriatal connections, organized in series.
    • Specific cognitive deficits result from small lesions without inducing movement disorders.
    • Glutamate identified as the primary neurotransmitter in cortico-neostriatal pathways.

    Conclusions:

    • The forebrain is organized into functional systems, each comprising a thalamic nucleus, cortical area, and neostriatal region.
    • This systems-level organization provides a framework for understanding neurobehavioral results.
    • The proposed model offers potential explanations for symptoms observed in neostriatal diseases.

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