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Lower Subscapular Nerve
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| Lower Subscapular Nerve | |
|---|---|
| Nerve Type | Motor nerve |
| Origin | Posterior cord of the brachial plexus carrying C5C7 fibers. |
| Course | Emerges in the axilla from the posterior cord, runs inferolaterally on the anterior surface of subscapularis toward the inferior axillary border, and reaches teres major. |
| Major Branches | Muscular branches to teres major and the inferior portion of subscapularis, with occasional small articular twigs to the glenohumeral joint. |
| Sensory innervation | No cutaneous field, providing proprioceptive afferents from teres major and lower subscapularis and possible articular fibers to the shoulder. |
| Motor innervation | Teres major and the inferior part of subscapularis enabling humeral internal rotation and adduction. |
