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Related Experiment Videos

Facial nerve distribution to the eye.

G L Ruskell

    American Journal of Optometry and Physiological Optics
    |November 1, 1985
    PubMed
    Summary

    Facial parasympathetic (FP) nerves can widen eye blood vessels and increase intraocular pressure. Acetylcholine and vasoactive intestinal polypeptide (VIP) are key neurotransmitters in this ocular response.

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    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Physiology

    Background:

    • Facial parasympathetic (FP) innervation plays a role in ocular hemodynamics.
    • Understanding the neurotransmitters involved in FP function is crucial for ocular health.

    Purpose of the Study:

    • To investigate the physiological effects of facial parasympathetic innervation on ocular vasculature.
    • To identify the neurotransmitters mediating these effects on intraocular pressure.

    Main Methods:

    • Anatomical investigations of FP pathways.
    • Physiological studies measuring uveal blood flow and intraocular pressure.
    • Neurotransmitter analysis in the ocular system.

    Main Results:

    • FP innervation was found to dilate uveal blood vessels.
    • Increased intraocular pressure was observed following FP stimulation.
    • Evidence suggests acetylcholine and vasoactive intestinal polypeptide (VIP) act as neurotransmitters in this pathway.

    Conclusions:

    • Facial parasympathetic nerves significantly influence ocular blood flow and intraocular pressure.
    • Acetylcholine and VIP are identified as key neurotransmitters in the FP system regulating ocular dynamics.

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