Medial: Scapula and Shoulder: STS

Question 1

Origin: subscapular fossa

Insertion: lesser tubercle of the humerus

Action: adduct and extend the shoulder

Innervation: Subscapular nerve

Answer 1

Subscarpularis

Question 2

Origin: subscapular fossa

Innervation: Subscapular nerve

Answer 2

Subscarpularis

Question 3

Insertion: lesser tubercle of the humerus

Answer 3

Subscarpularis

Question 4

Action: adduct and extend the shoulder

Answer 4

Subscarpularis

Question 5

Origin: caudal angle and adjacent border of the scapula;
»the caudal surface of the subscapularis

Insertion: teres major tuberosity of the humerus

Action: Flex the shoulder and rotate the arm medially

Innervation: Axillary nerve

Answer 5

Teres major

Question 6

Origin: caudal angle and adjacent border of the scapula;
»the caudal surface of the subscapularis

Answer 6

Teres major

Question 7

Insertion: teres major tuberosity of the humerus

Answer 7

Teres major

Question 8

Action: Flex the shoulder and rotate the arm medially

Innervation: Axillary nerve

Answer 8

Teres major

Question 9

Origin: coracoid process of the scapula

Insertion: crest of the lesser tubercle of the humerus proximal to the teres major tuberosity.

Action: to adduct and extend the shoulder

Innervation: Musculocutaneous nerve

Answer 9

Coracobrachialis