Shoulder Muscle - Teres Major

Muscle Origin

Inferior angle of the scapula

Muscle Insertion

Lesser tubercle of the humerus

Muscle Isolated Function

Concentric Action: Shoulder internal rotation, adduction, and extension

Muscle Integrated Function

Eccentric Action: Shoulder external rotation, abduction, and flexion Isometric Action: Stabilizes the shoulder girdle

Muscle Innervation

Lower subscapular nerve

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