Muscles of the Forearm and Hand

Question 1

Origin, insertion, and action of Supinator

Answer 1

Origin: Lateral epicondyle of humerus, anterior ulna
Insertion: Proximal radius
Action: Supinates hand

Question 2

Origin, insertion, and action of Pronator teres

Answer 2

Origin: Medial epicondyle of humerus, coronoid process of ulna
Insertion: Lateral and middle shaft of radius
Action: Pronates hand, flexes forearm

Question 3

Origin, insertion, and action of Palmaris longus

Answer 3

Origin: Medial epicondyle of humerus
Insertion: Palmar aponeurosis
Action: Flexes hand

Question 4

Origin, insertion, and action of Flexor digitorum superficialis

Answer 4

Origin: Medial epicondyle of humerus, proximal ulna, proximal radius
Insertion: Middle phalanges of II-V digits
Action: Flexes proximal and middle phalanges, flexes hand

Question 5

Origin, insertion, and action of Opponens pollicis

Answer 5

Origin: Trapezium
Insertion: First metacarpal
Action: Opposes thumb

Question 6

Origin, insertion, and action of Extensor digitorum

Answer 6

Origin: Lateral epicondyle of humerus
Insertion: Middle and distal phalanges of II-V digits
Action: Extends phalanges, extends hand

Question 7

Name an action of the Pronator quadratus

Answer 7

Pronates hand

Question 8

Name an action of the Flexor carpi radialis

Answer 8

Flexes and abducts hand

Question 9

Name an action of the Flexor carpi ulnaris

Answer 9

Flexes and adducts hand

Question 10

Name an action of the Flexor digitorum profundus

Answer 10

Flexes phalanges, flexes hand

Question 11

Name an action of the Flexor pollicis longus

Answer 11

Flexes thumb

Question 12

Name an action of the Flexor pollicis brevis

Answer 12

Flexes thumb

Question 13

Name an action of the Abductor pollicis brevis

Answer 13

Abducts thumb

Question 14

Name an action of the Extensor carpi radialis longus

Answer 14

Extends and abducts ahnd

Question 15

Name an action of the Extensor carpi radialis brevis

Answer 15

Extends and abducts hand

Question 16

Name an action of the Extensor carpi ulnaris

Answer 16

Extends and adducts hand

Question 17

Name an action of the Abductor pollicis longus

Answer 17

Abducts thumb

Question 18

Name an action of the Extensor pollicis longus

Answer 18

Extends thumb

Question 19

Name an action of the Extensor pollicis brevis

Answer 19

Extends thumb