Kinesiology 2236A/B Lecture Notes - Lecture 12: Subacromial Bursa, Scapula, Humerus

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2236A/B
• Professor: Dave Humphreys

Document Summary

Move shoulder through rom: abduction-supraspinatus o, er- infraspinatus, teres minor. Act as humeral head stabilizer (holds the ball in the socket) Contractile, sore when you stretch and contract it) Occasionally high force tear: use drop arm test raise arms above head and then slowly lower, if tear, the patient cannot hold arm at 90 degrees and arm will drop = supraspinatus tear. Weakness of rotator cuff muscles reduces the effectiveness of centralization of the humeral head. With impingement the humerus is pulled too far and pinches the supraspinatus or sub-acromial bursa. Issue of muscle imbalance deltoid too strong and rotator cuff too weak. Poor scapulohumeral rhythm (when the arm comes up, scapula has to swing with it) Positive hawkins kennedy, neer and possibly speed"s: usually anterior humeral head, dr. hawkins kennedy test= forward flexion to 90 degrees, internal rotating the humerus, bending the elbow and rotating it near impingement (rotating up and raising it)