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Related Experiment Videos

Origin of cingulate cortex cholinergic innervation in the rat.

R W Sikes, Z Gottesfeld, J F DeFrance

    Brain Research Bulletin
    |April 1, 1983
    PubMed
    Summary

    The nucleus of the diagonal band, not the thalamus, is the primary source of cholinergic innervation to the cingulate cortex. This finding clarifies the neuroanatomical pathways of the brain

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    Area of Science:

    • Neuroscience
    • Neuroanatomy
    • Cholinergic Systems

    Background:

    • The cingulate cortex receives cholinergic input, crucial for cognitive functions.
    • The specific origins of this innervation, particularly the nucleus of the diagonal band and thalamic nuclei, are not fully elucidated.

    Purpose of the Study:

    • To determine the relative contributions of the nucleus of the diagonal band and thalamic nuclei to the cholinergic innervation of the rat cingulate cortex.

    Main Methods:

    • Surgical lesions were performed in the nucleus of the diagonal band, anterior thalamus, and medial thalamus of rats.
    • Choline acetyltransferase (ChAT) activity was measured in discrete regions of the cingulate cortex post-lesion.

    Main Results:

    • Lesions of the nucleus of the diagonal band caused a significant reduction in ChAT activity in the cingulate cortex.
    • Lesions of the anterior and medial thalamus did not result in significant changes in cingulate cortical ChAT activity.

    Conclusions:

    • The nucleus of the diagonal band is the principal source of cholinergic innervation for the cingulate cortex.
    • Thalamic nuclei play a minimal role in the direct cholinergic innervation of the cingulate cortex.

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