Rotator cuff muscles

Question 1

Origin of the subscapularis?

Answer 1

Medial 2/3’s of subscapular fossa and covering fascia

Question 2

Insertion of subscapularis?

Answer 2

Lesser tubercle of the humerus

Question 3

Action of subscapularis?

Answer 3

Medial rotation of the arm at shoulder joint

Question 4

Innervation of subscapularis?

Answer 4

Upper and lower subscapular nerve (C5-C7)

Question 5

Origin of supraspinatus?

Answer 5

Medial 2/3’s of supraspinous fossa and covering fascia

Question 6

Insertion of supraspinatus?

Answer 6

Superior facet of greater tubercle of humerus

Question 7

Action of supraspinatus?

Answer 7

Abducts arm at shoulder joint

Question 8

Innervation of supraspinatus?

Answer 8

Suprascapular nerve (C5-C6)

Question 9

Origin of infraspinatus?

Answer 9

Medial 2/3’s of infraspinous fossa and covering fascia

Question 10

Insertion of infraspinatus?

Answer 10

Middle facet of greater tubercle of humerus

Question 11

Action of infraspinatus?

Answer 11

Laterally rotates the arm at the shoulder joint

Question 12

Innervation of infraspinatus?

Answer 12

Suprascapular nerve (C5-C6)

Question 13

Origin of teres minor?

Answer 13

Upper 2/3’s lateral border of the scapula

Question 14

Insertion of teres minor?

Answer 14

Inferior facet of the greater tubercule of the humerus

Question 15

Action of teres minor?

Answer 15

Laterally rotates the arm at shoulder joint

Question 16

Innervation of teres minor?

Answer 16

Axillary nerve (C5-C6)