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Related Experiment Videos

Peripheral autonomic surface potential: a quantitative technique for recording autonomic neural function in man.

W Knezevic, S Bajada

    Clinical and Experimental Neurology
    |January 1, 1985
    PubMed
    Summary

    Researchers identified a new skin potential, the peripheral autonomic surface potential (PASP), using EMG. This novel measurement shows promise for assessing autonomic nervous system function in both healthy individuals and patients with conditions like diabetes.

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    Area of Science:

    • Neuroscience
    • Autonomic Nervous System Physiology
    • Electrophysiology

    Background:

    • The autonomic nervous system (ANS) regulates involuntary bodily functions.
    • Quantitative assessment of peripheral autonomic function is crucial for diagnosing neurological disorders.
    • A previously poorly studied skin potential was investigated for its diagnostic utility.

    Purpose of the Study:

    • To characterize and record the peripheral autonomic surface potential (PASP).
    • To evaluate the PASP as a potential quantitative measure of autonomic function.
    • To assess PASP in healthy subjects and in patients with impaired autonomic function.

    Main Methods:

    • Utilized EMG equipment with time-locked recording and averaging.
    • Recorded PASP from palmar and plantar surfaces in 20 healthy subjects.

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  • Assessed PASP in patients with lumbar sympathectomy and diabetes mellitus.

    • Main Results:

    • PASP is a biphasic potential with distinct latencies and amplitudes on palmar and plantar surfaces.
    • Calculated mean central sympathetic conduction velocity at 1.2 m/s.
    • PASP was absent or reduced in patients post-lumbar sympathectomy and those with diabetes mellitus.

    Conclusions:

    • The peripheral autonomic surface potential (PASP) is a measurable electrophysiological response.
    • PASP demonstrates sensitivity to alterations in autonomic nervous system integrity.
    • PASP may serve as a valuable quantitative tool for assessing central and peripheral autonomic function.