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[The function of the precortical arteries].

Z T Gordeladze, D G Baramidze, Iu I Levkovich

    Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova
    |June 1, 1991
    PubMed
    Summary

    Precortical arteries in rabbits show significant dilation and response to stimuli, indicating their crucial role in regulating brain blood supply. This study highlights their dense innervation and cholinergic influence.

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    Fiziologicheskii zhurnal imeni I.M. Sechenova·1996

    Area of Science:

    • Neuroscience
    • Vascular Biology
    • Ophthalmology

    Context:

    • Investigates microvascular responses in the brain's blood supply system.
    • Examines the role of specific arterial pathways in cerebral circulation.
    • Utilizes animal models to understand physiological regulatory mechanisms.

    Purpose:

    • To determine the functional responses of pial and precortical arteries to retinal photostimulation and pharmacological agents.
    • To map the distribution of cholinergic and adrenergic nerve fibers in these cerebral microvessels.
    • To elucidate the specific role of precortical arteries in regulating brain blood flow.

    Summary:

    • Studies in anesthetized rabbits revealed that precortical arteries exhibit the most significant dilation and responsiveness to retinal photostimulation and strychnine application.
    • Dense cholinergic and adrenergic innervation was observed, particularly in precortical arteries, with atropine application more effectively suppressing responses in these vessels.
    • Findings suggest precortical arteries are key regulators of adequate cerebral blood supply.

    Impact:

    • Provides critical insights into the neurovascular control of cerebral blood flow.
    • Identifies precortical arteries as significant players in maintaining brain perfusion.
    • Offers a foundation for understanding potential therapeutic targets in cerebrovascular diseases.

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