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The spinal accessory nerve distal to the posterior triangle
1Broomfield Hospital, Chelmsford, UK. pereiras@compuserve.com
Journal of Hand Surgery (Edinburgh, Scotland)
|August 5, 1999
Summary
This study dissected 30 cadaver necks to trace the accessory nerve beyond the posterior triangle. The accessory nerve consistently runs deep to the trapezius muscle, offering crucial insights for neck surgeries.
Area of Science:
- Anatomy
- Surgical Anatomy
Background:
- The accessory nerve (CN XI) is vital for shoulder and neck movement.
- Understanding its distal course is crucial for surgical procedures in the posterior neck and shoulder region.
Purpose of the Study:
- To delineate the precise anatomical course of the accessory nerve distal to the posterior triangle.
- To identify consistent landmarks for surgical navigation.
Main Methods:
- Dissection of thirty (30) human cadaver necks.
- Detailed anatomical tracing of the accessory nerve's path after exiting the posterior triangle.
Main Results:
- The accessory nerve demonstrated a consistent anatomical course.
- The nerve was invariably located on the deep surface of the trapezius muscle.
Conclusions:
- The deep surface of the trapezius muscle serves as a reliable landmark for the accessory nerve.
- This anatomical finding has significant clinical implications for surgeons operating in the neck and shoulder region, potentially reducing iatrogenic injury.