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The human blink reflex.

B Shahani

    Journal of Neurology, Neurosurgery, and Psychiatry
    |December 1, 1970
    PubMed
    Summary
    This summary is machine-generated.

    Researchers studied the human blink reflex, finding both components are cutaneous reflexes. This reflex mechanism involves afferent fibers in the supraorbital nerve, even in patients with Friedreich

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    Area of Science:

    • Neuroscience
    • Human Physiology

    Background:

    • The human blink reflex involves the orbicularis oculi muscle.
    • Friedreich's ataxia patients exhibit selective loss of large sensory fibers and proprioceptive input.

    Purpose of the Study:

    • To investigate the human blink reflex in different parts of the orbicularis oculi muscle.
    • To identify afferent fibers and estimate conduction velocity for the blink reflex in humans.

    Main Methods:

    • Studied the blink reflex in various orbicularis oculi muscle sections.
    • Examined patients with Friedreich's ataxia to understand sensory fiber involvement.
    • Identified afferent fibers within the human supraorbital nerve.

    Main Results:

    • The first component of the blink reflex was observed in Friedreich's ataxia patients.
    • Both components of the blink reflex were confirmed as cutaneous reflexes.
    • Afferent fibers for the blink reflex were identified in the supraorbital nerve.
    • Conduction velocity of these afferent fibers was estimated for the first time in humans.

    Conclusions:

    • Both components of the blink reflex are mediated by the same afferent fiber group.
    • The blink reflex is a highly organized and purposeful mechanism in humans.