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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Generators of the early and late median thenar premotor potentials.
    Author: Park TA, Del Toro DR.
    Journal: Muscle Nerve; 1995 Sep; 18(9):1000-8. PubMed ID: 7643861.
    Abstract:
    The generator sources of the median thenar premotor potentials (PMPs) have remained elusive despite debate in the literature. By studying the median nerve in the hand with a variety of bipolar and referential recording montages, we systematically examined the possible near-field and far-field sources that may determine these potentials. The results suggest that the early PMP is a near-field potential recorded by G1 and generated by the median nerve traversing the distal carpal tunnel. The late PMP represents a far-field potential generated by the median digital nerve fibers as they pass from the palm volume into the thumb volume. Characteristics of the late PMP are explained using the leading/trailing dipole (L/TD) model of far-field potential generation. The diagnostic utility of these PMPs is questionable, since they are recorded from "regions" along the nerve rather than from more clearly defined sites.
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