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Related Experiment Videos

Neural pattern in the human pollical distal phalanx.

Richard K Johnson, Marvin M Shrewsbury

    Clinical Anatomy (New York, N.Y.)
    |July 15, 2005
    PubMed
    Summary

    This study details the nerve patterns in the human thumb

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    Area of Science:

    • Anatomy
    • Neuroscience
    • Morphology

    Background:

    • The neural innervation of the human thumb's ungual region is complex.
    • Understanding this pattern is crucial for clinical applications, particularly after nerve injuries.

    Purpose of the Study:

    • To conduct a morphological study of the neural patterns in the human ungual region of the pollical distal phalanx.
    • To describe the arrangement and distribution of ungual nerves and their relation to the ungual pulp and nail bed.

    Main Methods:

    • Morphological analysis through dissection of eight male cadavers.
    • Detailed examination of the palmar neural arrangement and ungual nerve distribution.

    Main Results:

    • Identified four designated ungual nerves (two proximal, two distal) for both ulnar and radial palmar digital nerves.
    • Described distinct innervation patterns for proximal and distal ungual pulp compartments, with overlapping in the distal compartment.
    • Documented a dorsal sensory nerve supplying the nail bed from each palmar digital nerve.

    Conclusions:

    • The study elucidates the specific neural architecture of the thumb's ungual region.
    • This detailed understanding aids in explaining clinical observations of sensory changes after nerve damage and informs surgical approaches.

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