Forearm Action

Question 1

Pronator teres

Answer 1

Pronates and flexes forearm

Question 2

Flexor carpi radialis

Answer 2

Flexes and abducts hand @ wrist

Question 3

Palmaris longus

Answer 3

Flexes hand;

Tenses palmar aponeurosis

Question 4

Flexor carpi ulnaris

Answer 4

Flexes hand, adducts hand

Question 5

Flexor digitorum superficialis

Answer 5

Flexes middle phalanges of medial 4 fingers @ proximal interphalangeal joints;
Flexes proximal phalanges @ metacarpophalangeal joints

Question 6

Flexor digitorum profundus (Medial)

Answer 6

Flexes distal phalanges of 4th and 5th digit @ distal interphalangeal joints

Question 7

Flexor digitorum profundus (Lateral)

Answer 7

Flexes distal phalanges of 2nd and 3rd digits @ distal interphalangeal joints

Question 8

Flexor pollicis longus

Answer 8

Flexes phalanges of 1st digit

Question 9

Pronator quadratus

Answer 9

Pronates forearm;

Deep fibers bind ulna and radius together

Question 10

Brachioradialis

Answer 10

Weak flexor of the forearm

Question 11

Extensor carpi radialis longus

Answer 11

Extends and adducts hand + active in fist clenching

Question 12

Extensor carpi radialis brevis

Answer 12

Extends and adducts hand

Question 13

Extensor digitorum

Answer 13

Extends medial 4 digits (primarily @ metacarpophalangeal joints + seondarily @ interphalangeal joints)

Question 14

Extensor digiti minimi

Answer 14

Extends 5th digit

Question 15

Extensor carpi ulnaris

Answer 15

Extends and adducts hand + active in fist clenching

Question 16

Supinator

Answer 16

Supinates forearm;

Rotates radius to turn palm anteriorly/superiorly (if elbow is flexed)

Question 17

Extensor indicis

Answer 17

Allows independent extension of 2nd digit;

Helps extend hand at wrist

Question 18

Abductor pollicis longus

Answer 18

Extends (@ carpometacarpal j.) and abducts thumb

Question 19

Extensor pollicis longus

Answer 19

Extends distal phalanx of thumb (@ carpometa. + interphalangeal j.)

Question 20

Extensor pollicis brevis

Answer 20

Extends proximal phalanx of thumb