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A prefix brachial plexus with two trunks and one anterior cord
K Natsis1, M Piagkou1, T Totlis2
1Department of Anatomy, School of Medicine, National and Kapodistrian University of Athens, Thessaloniki, Greece.
Folia Morphologica
|July 20, 2019
Summary
A rare "pre-fixed" brachial plexus variation, where the C4 nerve root joins the superior trunk, was observed. This anatomical anomaly impacts surgical procedures and nerve blocks in the arm and axilla.
Area of Science:
- Anatomy
- Clinical Neuroscience
Background:
- The brachial plexus exhibits significant anatomical variability in its formation, division, and branching patterns.
- Understanding these variations is crucial for surgical procedures and nerve blockade techniques in the axillary and arm regions.
Observation:
- This case report details a unilateral, atypical brachial plexus formation, termed a "pre-fixed" plexus.
- The C4 nerve root contributed a substantial branch to the superior trunk, with further anastomosis to the inferior trunk.
Findings:
- The observed pre-fixed brachial plexus comprised a superior trunk, an inferior trunk, and a single anterior cord.
- Associated neural and arterial variations were also noted and discussed in the context of existing literature.
Implications:
- Recognition of this brachial plexus variant is essential for surgeons performing axillary and arm procedures.
- Knowledge of such anatomical anomalies aids in preventing iatrogenic nerve injuries and improving the efficacy of nerve blocks.
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