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Septum and adrenocortical function.

D K Misra

    Indian Journal of Physiology and Pharmacology
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    The dorsal septum inhibits, while the ventral septum facilitates, the hypothalamo-pituitary-adrenal axis. Stress responses, like burns, were unaffected by lesions in either septum area.

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    Area of Science:

    • Neuroendocrinology
    • Neurobiology
    • Physiology

    Background:

    • The dorsal septum and ventral septum are key brain regions influencing the hypothalamo-pituitary-adrenal (HPA) axis.
    • The HPA axis regulates the body's response to stress.
    • Understanding septal nuclei's role is crucial for HPA axis modulation.

    Purpose of the Study:

    • To investigate the distinct roles of the dorsal and ventral septum in regulating the HPA axis.
    • To determine the effects of stimulating or lesing these septal areas on adrenocortical output.
    • To assess the impact of septal lesions on adrenocortical responses to burn stress.

    Main Methods:

    • Electrophysiological recordings and lesions in dorsal and ventral septum regions.
    • Measurement of adrenal venous 17-hydroxycorticosteroid (17-OHCS) output.

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  • Application of burn stress to evaluate adrenocortical response.

    • Main Results:

    • Dorsal septum stimulation decreased, while lesions increased, adrenocortical output, indicating an inhibitory role.
    • Ventral septum stimulation increased, while lesions decreased, 17-OHCS output, showing a facilitatory role.
    • Lesions of both dorsal and ventral septum did not block or inhibit the adrenocortical response to burn stress.

    Conclusions:

    • The dorsal and ventral septum act as crucial regulatory centers for the HPA axis, with opposing influences.
    • Septal nuclei play a significant role in basal HPA axis activity but do not abolish stress-induced responses.