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Variations in digital nerve anatomy
M R Zenn1, L Hoffman, G Latrenta
1Division of Plastic and Reconstructive Surgery, New York Hospital-Cornell University Medical Center, N.Y.
The Journal of Hand Surgery
|November 1, 1992
Summary
Digital nerve branching shows significant variation, contrary to traditional beliefs. These anatomical findings are crucial for surgeons performing digital nerve repair.
Area of Science:
- Anatomy
- Hand Surgery
- Microsurgery
Background:
- The digital nerves are critical for sensation and motor function in the hand.
- Traditional anatomical descriptions suggest a predictable trifurcation of digital nerves at the distal interphalangeal crease.
- Understanding variations in digital nerve branching is essential for successful surgical interventions.
Purpose of the Study:
- To analyze the branching patterns of digital nerves in cadaver hands.
- To identify variations from the commonly accepted anatomical description of digital nerve trifurcation.
- To provide clinically relevant anatomical data for digital nerve repair.
Main Methods:
- Dissection of 100 digital nerves from 10 cadaver hands.
- Detailed analysis of the branching patterns and locations of terminal branches.
- Comparison of branching patterns between different digits and sides.
Main Results:
- Significant variation in digital nerve branching patterns was observed.
- Terminal branching occurred distal to the distal interphalangeal crease in 60% of thumb digital nerves and 78% of other digital nerves.
- The number of terminal branches varied from two to seven in the thumb and two to five in other digits.
Conclusions:
- The traditional belief of predictable digital nerve trifurcation is inaccurate.
- Anatomical variations in digital nerve branching are common and clinically significant.
- This study provides essential anatomical insights for surgeons undertaking digital nerve repair.