Following surgical removal of a firm nodular cancer swelling in the right breast and exploration of the right axilla, on examination the patient was found to have a winged right scapula. Most likely this could have occured due to injury to the-
1.Subscapular muscle
2.Coracoid process of scapula
3.Long thoracic nerve
4.Circumflex scapular artery
exp:
Most common cause of winging of scapula is paralysis of serratus anterior. Long thoracic nerve innervates Serratus anterior. Serratus anterior originates from outer surface of upper 8 ribs and inserts onto inferior angle and medial border of scapula.
Actions
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It rotates the scapula to help in overhead abduction. -
Steady the scapula to carry weight. -
Pushing of arm forward in horizontal position. -
Helps in forced inspiration.