Multipennate muscle that lies behindserratus anterior, forms the most of the posterior aspect of the axilla (along with teres major and latissimus dorsi)
O (origin)
Medial2/3 of the sub-scapular fossa
A) Subscapularis
R (direction)
Fibres wind around head of humerusanteriorly
A) Subscapularis
I (insertion)
Fibres narrow to insert into the lesser tubercle of humerus via a broad thick tendon
Bursa separates the tendon from the scapula neck
A) Subscapularis
A (actions)
Medial rotation and adduction of the glenohumeral joint
A) Subscapularis
NS (nerve supply)
Upper and Lowersubscapular nerves (C5 - C7)
A) Subscapularis
Subscapularis - Function:
Holds head of humerus in glenoid fossa, resisting upward displacement during active contraction of biceps, triceps and deltoids
