DPT ~ Rotator Cuff (TISS) muscles AIONS

Teres Minor origin

Middle part of lateral border of scapula

Teres Minor insertion

Inferior facet of greater tubercle of humerus

Teres Minor action

Externally rotates arm; acts with other rotator cuff muscles

Teres Minor innervation

Axillary nerve (C5,C6)

Infraspinatus origin

Infraspinous fossa of scapula

Infraspinatus insertion

Middle facet of greater tubercle of humerus

Infraspinatus action

Externally rotates arm; acts with the other rotator cuff muscles

Infraspinatus innervation

Suprascapular nerve (C5,C6)

Supraspinatus origin

Supraspinous fossa of scapula

Supraspinatus insertion

Superior facet of greater tubercle of humerus

Supraspinatus action

Initiates and assists deltoid in abduction of arm and acts with the other rotator cuff muscles

Supraspinatus innervation

Suprascapular nerve (C4,C5,C6)

Subscapularis origin

Subscapular fossa (most of anterior surface of scapula)

Subscapularis insertion

Lesser tubercle of humerus

Subscapularis action

Internally rotates arm; hold head of humerus in glenoid cavity

Subscapularis innervation

Upper and lower subscap nerve (C5, C6, C7)