💪 Anatomy ProfileShoulder & Upper Arm

Infraspinatus

Kinesiology & Myology Reference

📍 Origin (Proximal Attachment)

Infraspinous fossa of the scapula

🎯 Insertion (Distal Attachment)

Greater tubercle of the humerus

🏃‍♂️ Action (Primary Function)

Laterally Rotate the glenohumeral jt Adduct the glenohumeral jt Stabilize the head of the humerus in glenoid cavity

⚡ Innervation (Nerve Supply)

Suprascapular C(4),5,6

🖐️ Clinical Palpation Key

Prone - w/arm off side of table - resist lateral rotation (against your leg) (hand towards head of table)

💡 Clinical Assessment Notes

Rotator Cuff group