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Related Experiment Videos

The radial sensory nerve. An anatomic study

D M Auerbach1, E D Collins, K L Kunkle

  • 1Southern California Orthopedic Institute, Van Nuys.

Clinical Orthopaedics and Related Research
|November 1, 1994
PubMed
Summary
This summary is machine-generated.

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This study details the superficial radial nerve

Area of Science:

  • Anatomy
  • Orthopedics
  • Surgical Anatomy

Background:

  • The superficial radial nerve (SRN) is crucial for sensation in the hand's dorsal aspect.
  • Variations in SRN branching and its anatomical relationship to surgical sites are not fully elucidated.
  • Understanding SRN anatomy is vital for preventing iatrogenic injury during hand and wrist procedures.

Purpose of the Study:

  • To precisely map the anatomical course of the superficial radial nerve.
  • To identify the variability in its branching patterns.
  • To assess the proximity of SRN branches to common surgical landmarks on the dorsum of the hand and wrist.

Main Methods:

  • Dissection of the superficial radial nerve in 20 cadaver forearms using loupe magnification.
  • Detailed measurement of nerve origin, fascial penetration, and wrist crossing points.

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  • Documentation of the number and distribution of nerve branches innervating the digits.

    • Main Results:

    • The SRN originated 8.6 cm proximal to the radial styloid and pierced the fascia 6.0 cm from the styloid.
    • An average of 5.8 branches crossed the wrist joint.
    • Digital innervation patterns varied, with 45% innervating 2.5 digits and 30% innervating 3.5 digits radially.
    • Significant overlap was noted with incisions for De Quervain's release and wrist arthroscopy portals.

    Conclusions:

    • The anatomical course and variable digital innervation of the superficial radial nerve are critical considerations.
    • Surgeons must be aware of SRN branch proximity to surgical sites like De Quervain's release and wrist arthroscopy portals.
    • This knowledge aids in minimizing iatrogenic nerve injury during dorsal hand and wrist surgeries.