Rotator Cuff

Question 1

Supraspinatus Origin

Answer 1

Subscapular fossa of the scapula

Question 2

Supraspinatus Insertion

Answer 2

Lesser tubercle of the humerus

Question 3

Supraspinatus Action

Answer 3

Helps the deltoid initiate the abduction of the arm

Question 4

Supraspinatus Innervation

Answer 4

Nerve to the muscle: suprascapular nerve
Nerve roots: C5 and C6

Question 5

Infraspinatus Origin

Answer 5

infraspinous fossa of the scapular

Question 6

Infraspinatus Insertions

Answer 6

Middle part of the greater tubercle of the humerus

Question 7

Infraspinatus Action

Answer 7

Laterally rotates the arm at the shoulder joint (glenohumeral)

Question 8

Infraspinatus Innervation

Answer 8

Nerve to the muscle: suprascapular nerve
Nerve roots: C5 and C6

Question 9

Teres Minor Origin

Answer 9

Middle part of the lateral (axillary) border of the scapula

Question 10

Teres Minor Insertion

Answer 10

Inferior aspect of the greater tubercle of the humerus

Question 11

Teres Minor Action

Answer 11

1. Laterally rotates the arm at the shoulder joint (glenohumeral)
2. Weakly abducts the arm at the shoulder joint (glenohumeral)

Question 12

Teres Minor Innervation

Answer 12

Nerve to the muscle: Axillary nerve
Nerve roots: C5 and C6

Question 13

Subscapularis Origin

Answer 13

Subscapular fossa of the scapula

Question 14

Subscapularis Insertion

Answer 14

Lesser tubercle of the humerus

Question 15

Subscapularis Action

Answer 15

Medially rotates the arm at the shoulder joint (glenohumeral)

Question 16

Subscapularis Innervation

Answer 16

Nerve to the muscle: upper and lower subscapular nerves
Nerve roots: C5, C6, and C7