Muscles

Question 1

List the 4 rotator cuff muscles?

Answer 1

1. Supraspinatus.
2. Infraspinatus.
3. Teres minor.
4. Subscapularis.

Question 2

What is the origin and insertion of the supraspinatus?

Answer 2

Origin: Supraspinous fossa of the scapula.
Insertion: Greater tubercle of the humerus.

Question 3

What is the origin and insertion of the infraspinatus?

Answer 3

Origin: Infraspinous fossa of the scapula.
Insertion: Greater tubercle of the humerus.

Question 4

What is the origin and insertion of the teres minor?

Answer 4

Origin: Lateral border of the scapula.
Insertion: Greater tubercle of the humerus.

Question 5

What is the origin and insertion of the subscapularis?

Answer 5

Origin: Subscapular fossa.
Insertion: Lesser tubercle of the humerus.

Question 6

List 4 muscles that arise from the axial skeleton and act on the scapula.

Answer 6

1. Rhomboid major.
2. Rhomboid minor.
3. Levator scapula.
4. Upper trapezius.

Question 7

What 2 heads make up the pectoralis major?

Answer 7

1. Sternocostal head.
2. Clavicular head.

Question 8

What is the origin and insertion of the sternocostal head of the pectoralis major?

Answer 8

Origin: Sternum.
Insertion: Bicipital groove of the humerus.

Question 9

What is the origin and insertion of the clavicular head of the pectoralis major?

Answer 9

Origin: Clavicle.
Insertion: Bicipital groove of the humerus.