Shoulder Muscles Taelar Shelton, MS, ATC, AT/L. Rotator Cuff Muscles Supraspinatus Infraspinatus...
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Transcript of Shoulder Muscles Taelar Shelton, MS, ATC, AT/L. Rotator Cuff Muscles Supraspinatus Infraspinatus...
Shoulder MusclesTaelar Shelton, MS, ATC, AT/L
Rotator Cuff Muscles
•Supraspinatus•Infraspinatus•Teres Minor•Subscapularis
•“SITS” Muscles
Supraspinatus• O: Supraspinous foss• I: greater tubercle• A: Assists in
abduction, stabilizes shoulder, prevents dislocation
Infraspinatus • O: Infraspinous fossa• I: Greater tubercle of
the humerus• A: External rotation of
the humerus
Teres Minor• O: Lateral boder of
dorsal surface of scapula
• I: greater tubercle• A: external rotation of
humerus
Subscapularis• O: subscapular fossa• I: lesser tubercle• A: internal rotation of
humerus
Rhomboids Major• O: Spinous processes
T2-T5• I: inferior, medial
boarder of the scapula• A: Retracts the
scapula
Rhomboids Minor• O: spinous process of
C7-T1• I: Superior, medial
boarder of the scapula• A: Retracts scapula
Serratus Anterior• O: Ribs 1-8• I: Anterior surface of
the vertebral (medial) border of the scapula
• A: Protracts and holds the scapula against the chest wall