Rotator Cuff Muscles
Description:
In this video I show the 4 rotator cuff muscles as well as the Teres major.
Subscapularis
Sub (L) under, below
Scapul, =a (L) The shoulder blade
Origin - Anterior surface of scapula
Insertion - Lesser tubercle humerus
Action - Medial or internal rotation of humerus
Supraspinatus
Supra (L). Above, over, beyond
Spin, =a, -i (L). A spine, thorn
Origin - Supraspinous fossa of scapula
Insertion - Greater tubercle of humerus
Action - Abduction of humerus
Infraspinatus
Infra (L). Below, beneath
Spin, =a, -i (L). A spine, thorn
Origin - Infraspinous fossa of scapula
Insertion - Posterior humerus
Action - External rotation of humerus
Teres minor
Tere, =s, -t (L). Round, smooth
Minor (L). Less, smaller
Origin - Axillary border of scapula
Insertion - Posterior humerus
Action - External rotation of humerus
Teres major (also shown - not a rotator cuff muscle)
Tere, =s, -t (L). Round, smooth
Major (L). Larger
Origin - Inferior part of axillary border of scapula
Insertion - Anterior humerus
Actions - Adduction, internal rotation and extension of humerus
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