Arm and Forearm Muscle Charts

Question 1

Musculocutaneous nerve

Answer 1

Biceps Brachii and Coracobrachialis

Question 2

Brachialis innervation

Answer 2

Musculocutaneous and Radial

Question 3

Radial nerve

Answer 3

Triceps Brachii, Anconeus, and Brachioradialis

Question 4

Median nerve

Answer 4

Pronator Teres, Flexor carpi radialis, Palmaris longus, Flexor digitorum superficialis

Question 5

Biceps Brachii

Answer 5

Supinates forearm and when it is supine, flexes forearm; short head resists dislocation of shoulder

Question 6

Coracobrachialis

Answer 6

Helps flex and adduct arm; resists dislocation of shoulder

Question 7

Brachialis

Answer 7

Flexes forearm in all positions

Question 8

Triceps Brachii

Answer 8

Chief extensor of forearm; long head resists dislocation of abducted humerus and extends and adducts arm at shoulder

Question 9

Anconeus

Answer 9

Assists triceps in extending forearm; stabilizes elbow joint; abducts ulna in pronation

Question 10

Pronator Teres

Answer 10

Pronates and assists with flexing forearm

Question 11

Flexor carpi ulnaris innervation

Answer 11

Ulnar

Question 12

Flexor digitorum profundus innervation

Answer 12

Medial part: Ulnar;

Lateral part: Anterior interosseus nerve from median nerve

Question 13

Anterior Interosseous Nerve

Answer 13

Flexor pollicus longus and Pronator quadratus

Question 14

Flexor carpi radialis

Answer 14

Flexes and abducts hand at wrist

Question 15

Palmaris longus

Answer 15

Flexes hand at wrist and tenses palmar aponeurosis

Question 16

Flexor carpi ulnaris

Answer 16

Flexes and adducts hand at wrist

Question 17

Flexor digitorum superficialis

Answer 17

Flexes middle phalanges at proximal interphalangeal joints of middle four digits; acting more strongly it also flexes proximal phalanges at metacarpophalangeal joints

Question 18

Flexor digitorum profundus

Answer 18

Medial part: flexes distal phalanges 4 and 5 at distal interphalangeal joints;
Lateral part: flexes distal phalanges 2 and 3 at distal interphalangeal joints

Question 19

Flexor pollicis longus

Answer 19

Flexes phlanges of 1st digit (thumb)

Question 20

Pronator quadratus

Answer 20

Pronates forearm; deep fibers bind radius and ulna together

Question 21

Brachioradialis

Answer 21

Relatively weak flexion of forearm; maximal when forarm is in mid-pronated position