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Brachial plexus anatomy.
Charles F Leinberry1, Marwan A Wehbé
1Orthopaedic Surgery, Jefferson Medical College, Philadelphia, PA, USA. cleinberry@pahandcenter.com
Hand Clinics
|March 10, 2004
Summary
The brachial plexus, a network of nerves, originates from C5-T1 spinal nerves and forms five terminal nerves. Its complex structure of trunks, divisions, and cords can present anatomical variations.
Area of Science:
- Anatomy
- Neuroscience
- Human Physiology
Background:
- The brachial plexus is a complex network of nerves essential for upper limb function.
- Understanding its intricate structure is crucial for clinical diagnosis and surgical procedures.
- Variations in brachial plexus anatomy are common and can complicate medical interventions.
Purpose of the Study:
- To provide a simplified yet comprehensive overview of brachial plexus anatomy.
- To clarify the sequential formation of brachial plexus components from roots to terminal nerves.
- To highlight the common anatomical variations encountered in the brachial plexus.
Main Methods:
- Descriptive anatomical review.
- Systematic tracing of nerve pathways from origin to termination.
- Identification of key anatomical landmarks and branching patterns.
Main Results:
- The brachial plexus originates from the anterior rami of C5, C6, C7, C8, and T1 spinal nerves.
- It forms three trunks, three divisions, and three cords, ultimately branching into five major nerves: musculocutaneous, median, ulnar, axillary, and radial.
- Frequent variations in the length and caliber of brachial plexus components exist.
Conclusions:
- The brachial plexus follows a predictable, albeit complex, anatomical pathway.
- Awareness of its structure and common variations is vital for healthcare professionals.
- This simplified visualization aids in understanding brachial plexus neuroanatomy.