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Unilateral all ulnar hand including sensory without forearm communication
Byung-Jo Kim1, Elaine S Date, Sang-Heon Lee
1Division of Physical Medicine and Rehabilitation, Department of Orthopedic Surgery, Stanford University School of Medicine, Stanford, California 94305, USA.
American Journal of Physical Medicine & Rehabilitation
|June 24, 2004
Summary
The rare "ulnar hand" condition, where intrinsic hand muscles receive only ulnar nerve input, is detailed. This case uniquely shows both motor and sensory ulnar nerve exclusivity, crucial for electrodiagnostic interpretation.
Area of Science:
- Neuroscience
- Anatomy
- Clinical Neurology
Background:
- The ulnar hand is a rare anatomical variation.
- Typically, reported cases involve only motor innervation by the ulnar nerve.
Observation:
- This study presents a unique case of exclusive unilateral ulnar motor and sensory innervation.
- The patient exhibited a complete absence of median and radial nerve contributions to intrinsic hand muscles.
Findings:
- The case confirms the possibility of full intrinsic hand muscle innervation solely by the ulnar nerve, encompassing both motor and sensory functions.
- This represents an extreme variant of peripheral nerve organization.
Implications:
- Awareness of this rare variation is critical for accurate electrodiagnostic examinations.
- Understanding this anatomical anomaly aids in diagnosing nerve-related conditions and preventing misinterpretations.