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Long Thoracic Nerve

- Discussion:
    - long thoracic nerve is derived from ventral rami of C5, C6, & C7 - close to their emergence from intervertebral foramina;
    - it runs downward & pases either in front of or behind middle scalene muscle;
    - it reaches upper slip of serratius anterior muscle & descends on outer surface of this muscle, giving branches into it;

- Winging of Scapula: 
    -  most often associated with Parsonage-Turner syndrome, a condition thought to be due to an inflammatory or immune-mediated mechanism;
    - may occur from long thoracic nerve injury (most common) or from spinal accessory nerve injury (which deinnervates the trapezius) or a dorsal scapular nerve injury 

Long Thoracic Nerve: Anatomy and Functional Assessment.

The clinical spectrum of neuralgic amyotrophy in 246 cases

Winging of the scapula: an unusual complication of chest tube placement.