Rotator Cuff

Question 0

Infraspinatus

Answer 0

• O: infrascapular fossa
• I: middle facet of greater tubercle of humerus
• N: suprascapular nerve (C5,6)
• V: suprascapular a.
• A: lateral rotation, cuff stabilization

Question 1

Supraspinatus

Answer 1

• O: supraspinatus scapular fossa
• I: superior facet of greater tubercle of humerus
• N: suprascapular nerve (C4,5,6)
• V: suprascapular a.
• A: abduction, rotator cuff stabilization

Question 2

Teres Minor

Answer 2

• O: middle lateral border of scapula
• I: inferior facet of greater tubercle of humerus
• N: axillary nerve (C5,6)
• V: circumflex scapular a.
• A: externally rotates humerus. Cuff stabilization

Question 3

Teres major

Answer 3

O: posterior inferior angle of scapula
I: intertubercular sulcus
N: lower subscapular n (C5,6)
V: subscapular and circumflex scapular aa
A: adducts and medically rotates arm

Question 4

Subscapularis

Answer 4

• O: subscapular fossa
• I: lesser tubercle of humerus
• N: subscapular n. (C5,6,7)
• V: subscapular a.
• A: medial rotation, cuff stabilization

Question 5

Deltoid

Answer 5

O: lateral clavicle, acromion, spine of scapula
I: deltoid tuberosity of humerus
N: axillary n (C5,6)
V: posterior circumflex humeral artery
A: flex, extend, medically rotate, laterally rotate, & abduct arm