Muscles Of The Posterior Trunk and Arm

Question 1

Infraspinatus

Answer 1

Superficial

Laterally rotates and adducts arm

Question 2

Teres minor

Answer 2

Superficial

Laterally rotates, extends, and adducts arm

Question 3

Teres major

Answer 3

Superficial

Extends, adducts and medially rotates arm

Question 4

Latissimus Dorsi

Answer 4

Superficial

Extends, adducts, and medially rotates arm

Question 5

Supraspinatus

Answer 5

Deep

Assists deltoid muscle in abducting arm

Question 6

Trapezius

Answer 6

Superficial

Superior portion elevates scapula and extends head, middle portion adducts scapula, and inferior portion depressed scapula

Question 7

Rhomboid minor

Answer 7

Deep

Elevates and adducts scapula and rotates it downward, stabilizes scapula

Question 8

Rhomboid major

Answer 8

Deep

Elevates and adducts scapula and rotates I’m downward, stabilizes scapula

Question 9

Erector spinae

Answer 9

Extend vertebral column and maintain erect posture when both muscles contract. Laterally flexes vertebral column when only one muscle

Question 10

Biceps brachii

Answer 10

Anterior- flexes and supinate a forearm and flexes arm

Question 11

Brachialis

Answer 11

Anterior- flexes forearm

Question 12

Triceps brachii

Answer 12

Posterior- all three heads extend forearm and help extend arm

Question 13

Brachioradialis

Answer 13

Superficial

Flexes forearm and pronates and supinates forearm to neutral position

Question 14

Pronator teres

Answer 14

Superficial

Pronates and weakly flexes forearm

Question 15

Supinator

Answer 15

Deep

Supinates forearm

Question 16

Deltoid

Answer 16

Superficial

Posterior portion of deltoid extends and laterally rotates arm