Infraspinatus

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Other Names Rotatory Cuff Back Heads Infraspinatus Movement Shoulder External Rotation Transverse Abduction Transverse Extension Posterior Stability Attachments Origin Scapula (Medial) Infraspinous fossa Insertion Humerus Greater Tubercle (Posterior) Middle Facet Related Muscles The infraspinatus is the second most often injured rotator cuff muscle. It is assisted by the Teres Minor. See other rotator cuff muscles: Teres Minor Subscapularis Supraspinatus Comments See infraspinatus weakness.