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KH 2220 Laura Abbott, MS, LMT. Day 15 Shoulder Muscles. Rotator Cuff. SITS muscles S = Supraspinatus I = Infraspinatus T = Teres minor S = Subscapularis. Rotator Cuff Muscles. Supraspinatus O: supraspinous fossa I: greater tuberosity
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KH 2220Laura Abbott, MS, LMT Day 15 Shoulder Muscles
Rotator Cuff • SITS muscles • S = Supraspinatus • I = Infraspinatus • T = Teres minor • S = Subscapularis
Rotator Cuff Muscles Supraspinatus O: supraspinous fossa I: greater tuberosity A: Abducts shoulder to about 45 degrees, stabilize head of humerus in glenoid cavity
Rotator Cuff Muscles Infraspinatus O: infraspinous fossa I: greater tuberosity A: laterally rotates, adducts, extends, horizontally abducts shoulder, and stabilizes head of humerus in glenoid fossa
Rotator Cuff Muscles Teres Minor O: superior lateral border (superior to major) I: greater tuberosity A: laterally rotates, adducts, extends, horizontally abducts shoulder, and stabilizes head of humerus in glenoid fossa
Rotator Cuff Muscles Subscapularis O: subscapular fossa I: lesser tuberosity A: internal rotation, stabilizes the head of humerus in glenoid fossa.
LIPS L = Latissimus Dorsi I = Internal Rotation P = Pec Major S = Subscapularis EXIT EX = EXternal rotation I = Infraspinatus T = Teres minor Acronyms
Deltoid O: anterior – outer 1/3 of clavical middle – boarder of acromion posterior – scapular spine I: deltoid tuberosity A: ant. –shoulder flexion, medially rotates, and horizontally adducts shoulder mid. – shoulder Abduction post. – shoulder extension, lateral rotation, and horizontal abduction
Muscles Teres Major O: inferior angle of scapula and lower ½ of lateral border of scapula I: intertubercle groove A: Adduction, some internal rotation, shoulder extension