Myology of the wrist

Question 1

Origin of flexor carpi ulnaris?

Answer 1

Medial condyle of humerus via common flexor tendon

Question 2

Insertion of flexor carpi ulnaris?

Answer 2

Pisiform then via ligaments to hook of hamate and 5th metacarpal

Question 3

Action of flexor carpi ulnaris?

Answer 3

Flexion and ulnar deviation of wrist

Question 4

Innervation of flexor carpi ulnaris?

Answer 4

Ulnar nerve (C7-C8)

Question 5

Origin of flexor carpi radialis?

Answer 5

Medial condyle of humerus via common flexor tendon

Question 6

Insertion of flexor carpi radialis?

Answer 6

Palmar surface bases of 2nd and 3rd metacarpals

Question 7

Action of flexor carpi radialis?

Answer 7

Flexion and radial deviation of wrist

Question 8

Innervation of flexor carpi radialis?

Answer 8

Median nerve (C6-C7)

Question 9

Origin of palmaris longus?

Answer 9

Medial condyle of humerus via common flexor tendon

Question 10

Insertion of palmaris longus?

Answer 10

Palmar aponeurosis and flexor retinaculum

Question 11

Action of palmaris longus?

Answer 11

Weak flexor of the wrist

Question 12

Innervation of palmaris longus?

Answer 12

Median nerve (C8)

Question 13

Origin of extensor carpi ulnaris?

Answer 13

Lateral epicondyle of humerus via common extensor tendon via aponeurosis to posterior border of ulna

Question 14

Insertion of extensor carpi ulnaris?

Answer 14

Medial side base of 5th metacarpal

Question 15

Action of extensor carpi ulnaris?

Answer 15

Extension and ulnar deviation of the wrist

Question 16

Innervation of extensor carpi ulnaris?

Answer 16

Posterior interosseous nerve (C7-C8): branch of the deep division of the radial nerve

Question 17

Origin of extensor carpi radialis longus?

Answer 17

Lower third of supracondylar ridge of humerus and adjacent intermuscular septum

Question 18

Insertion of extensor carpi radialis longus?

Answer 18

Posterior surface base of 2nd metacarpal

Question 19

Action of extensor carpi radialis longus?

Answer 19

Extends and radial deviation of wrist

Question 20

Innervation of extensor carpi radialis longus?

Answer 20

Radial nerve (C6-C7)

Question 21

Origin of extensor carpi radialis brevis?

Answer 21

Lateral condyle of humerus via common extensor tendon

Question 22

Insertion of extensor carpi radialis brevis?

Answer 22

Posterior surface base of 3rd metacarpal

Question 23

Action of extensor carpi radialis brevis?

Answer 23

Extension and radial deviation of wrist

Question 24

Innervation of extensor carpi radialis brevis?

Answer 24

Posterior interosseous branch of radial nerve (C6-C7)