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Updated: Aug 9, 2026

08:16
Utility of Dissociated Intrinsic Hand Muscle Atrophy in the Diagnosis of Amyotrophic Lateral Sclerosis
Published on: March 4, 2014
Summary
Most digital nerves branch from the radial nerve. In a rare case, three distinct digital nerves were found on the flexor side of the index finger, differing from typical anatomical branching patterns.
Area of Science:
- Anatomy
- Neuroscience
- Surgical anatomy
Background:
- Digital nerves are crucial for sensation and motor function in the hand.
- Understanding the branching patterns of digital nerves is essential for surgical procedures and diagnosing nerve-related conditions.
Observation:
- Typically, digital nerves arise from the median or ulnar nerves, with the radial nerve contributing a dorsal branch.
- The study observed an unusual anatomical variation in the digital innervation of the index finger.
Findings:
- In most cases, three nerves on the flexor side of a finger result from a proximal radial digital nerve ramification with a dorsal branch.
- A unique case presented three distinct digital nerves solely on the flexor side of the index finger.
Implications:
- This finding highlights the variability of digital nerve anatomy.
- Awareness of such variations is critical for surgeons performing hand and finger procedures to avoid iatrogenic injury.
- Further anatomical studies may be needed to fully delineate these variations.
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