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The cingulate bridge between allocortex, isocortex and thalamus

E W Powell

    The Anatomical Record
    |April 1, 1978
    PubMed
    Summary
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    The cingulate cortex in squirrel monkeys projects to the striatum and thalamus. Specific areas like the anterior limbic and retrosplenial regions act as crucial bridges, connecting thalamic and cortical areas for motor control.

    Area of Science:

    • Neuroscience
    • Primate Brain Anatomy
    • Cortical Connectivity

    Background:

    • The cingulate cortex plays a vital role in various cognitive and emotional functions.
    • Understanding its intricate fiber projections is essential for mapping brain circuitry.

    Purpose of the Study:

    • To investigate the fiber projections originating from the cingulate cortex in the squirrel monkey.
    • To elucidate the role of the cingulate cortex as an intermediary between the thalamus and other cortical regions.

    Main Methods:

    • Fink-Heimer silver impregnation technique.
    • Autoradiographic methods for tracing neural pathways.

    Main Results:

    • The cingulate cortex projects to the striatum, thalamus, and various isocortical areas.

    Related Experiment Videos

  • Specific projections identified from anterior limbic, cingulate, and retrosplenial areas to subcortical nuclei (caudate, putamen, thalamic nuclei) and brainstem.
  • Demonstrated the cingulate gyrus's role as an intermediate structure linking thalamus and cortex, with anterior limbic and retrosplenial areas serving as critical bridges.

    • Conclusions:

    • The cingulate cortex is a key structure involved in information relay between the thalamus and cortex.
    • Specific regions of the cingulate gyrus facilitate communication between sensory/motor cortices and subcortical structures.
    • These projections provide essential limbic system input to subcortical motor structures.