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An aberrant flexor digiti minimi brevis manus muscle
Georgi P Georgiev1, Lazar Jelev
1University Hospital of Orthopaedics Prof. B. Boychev and Department of Anatomy, Histology, and Embryology, Medical University Sofia, Sofia, Bulgaria. georgievgp@yahoo.com
The Journal of Hand Surgery
|October 22, 2011
Summary
A unique flexor digiti minimi brevis muscle variant was found during wrist dissection. This anatomical variation may have clinical implications for wrist surgery and nerve impingement.
Area of Science:
- Anatomy
- Morphology
- Human Anatomy
Background:
- Anatomical dissections are crucial for understanding human musculoskeletal variations.
- The flexor digiti minimi brevis (manus) muscle is a key component of hand function.
Observation:
- A rare variant of the flexor digiti minimi brevis (manus) muscle was identified in the right volar wrist.
- This aberrant muscle originated from the flexor carpi radialis tendon and coursed ulnarward.
Findings:
- The variant muscle crossed superficial to the median nerve and deep to the ulnar artery and nerve within the Guyon canal.
- It inserted onto the base of the fifth proximal phalanx and was innervated by the deep branch of the ulnar nerve.
Implications:
- This anatomical anomaly could lead to median or ulnar nerve compression syndromes.
- Awareness of this variant is important for surgeons performing wrist procedures to avoid iatrogenic injury.
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