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MUSCLE ORIGIN INSERTION NERVE SUPPLY ACTION
Supraspinatus Supraspinousfossa of Scapula
Superior facet of Greater tubercle of Humerus
SuprascapularNerve (C4, C5,C6)
Initiates and assists in adduction of the arm
Infraspinatus Infraspinousfossa of scapula
Middle tubercle of greater tubercle of humerus
SuprascapularNerve (C5, C6)
Laterally rotates the arm
MUSCLE ORIGIN INSERTION NERVE SUPPLY ACTION
Teres minor Middle part of lateral border of scapula
Inferior facet of greater tubercle of Humerus
Axillary Nerve (C5, C6)
Laterally rotates the arm
Subscapularis Subscapularfossa of scapula
Lesser tubercle of humerus
Upper and lower subscapularnerves (C5, C6, C7)
Mediallr rotates the arm