Posterior Forearm Muscles

Question 1

Brachioradialis (attachments)

Answer 1

Lateral supracondylar ridge to styloid of the radius

Question 2

Brachioradialis (actions)

Answer 2

Elbow flexion

Question 3

Brachioradialis (innervation)

Answer 3

Radial nerve (C5-6)

Question 4

Extensor Carpi Radialis Longus (attachments)

Answer 4

Lateral supracondylar ridge to base of 2nd metacarpal

Question 5

Extensor Carpi Radialis Longus (actions)

Answer 5

Extend & radial deviation of hand @ wrist & assists in elbow flexion

Question 6

Extensor Carpi Radialis Longus (innervation)

Answer 6

Radial nerve (C6-8)

Question 7

Extensor Carpi Radialis Brevis (attachment)

Answer 7

Lateral epicondyle to base of 3rd metacarpal

Question 8

Extensor Carpi Radialis Brevis (actions)

Answer 8

Extend & radial deviation of hand @ wrist

Question 9

Extensor Carpi Radialis Brevis (innervation)

Answer 9

Radial nerve (C6-8)

Question 10

Extensor Digitorum (attachments)

Answer 10

Lateral epicondyle to extensor expansion of digits 2-5

Question 11

Extensor Digitorum (innervation)

Answer 11

Radial nerve (C6-8)

Question 12

Extensor Digiti Minimi (attachment)

Answer 12

Lateral epicondyle to digital expansion of 5th digit

Question 13

Extensor Digiti Minimi (actions)

Answer 13

Extend 5th digit @ MCP & IP

Question 14

Extensor Digiti Minimi (innervation)

Answer 14

Radial nerve (C7-8)

Question 15

Extensor Carpi Ulnaris (attachment)

Answer 15

Lateral epicondyle to base of 5th metacarpal

Question 16

Extensor Carpi Ulnaris (action)

Answer 16

Extends & ulnar deviation @wrist

Question 17

Extensor Carpi Ulnaris (innervation)

Answer 17

Radial nerve (C6-8)

Question 18

Supinator (attachment)

Answer 18

Lateral epicondyle, RCL & supinator crest of ulna to lateral surface of proximal radius

Question 19

Supinator (action)

Answer 19

Supinate forearm

Question 20

Supinator (innervation)

Answer 20

Radial nerve (C5-6)

Question 21

Extensor Indicis (attachment)

Answer 21

Posterior surface of ulna & interosseous membrane to digital expansion of 2nd digit

Question 22

Extensor Indicis (action)

Answer 22

Extends 2nd digit @ MCP & IP

Question 23

Extensor Indicis (innervation)

Answer 23

Radial nerve (C7-8)

Question 24

Abductor Pollicis Longus (attachment)

Answer 24

Proximal posterior radius, ulna & interosseous membrane to base of 1st metacarpal & trapezium

Question 25

Abductor Pollicis Longus (actions)

Answer 25

Abducts & extends thumb @ CMC joint and radial deviation

Question 26

Abductor Pollicis Longus (innervation)

Answer 26

Radial nerve (C6-8)

Question 27

Extensor Pollicis Brevis (attachments)

Answer 27

Posterior radial surface & interosseous membrane to base of 1st proximal phalanx

Question 28

Extensor Pollicis Brevis (action)

Answer 28

Extends thumb (MCP), extends & abducts @ CMC joint

Question 29

Extensor Pollicis Brevis (innervation)

Answer 29

Radial nerve (C6-8)q

Question 30

Extensor Pollicis Longus (attachments)

Answer 30

Middle 1/3 of posterior surface of ulna & interosseous membrane to the base of 1st distal phalanx

Question 31

Extensor Pollicis Longus (action)

Answer 31

Extend thumb @ CMC, MCP & IP

Question 32

Extensor Pollicis Longus (innervation)

Answer 32

Radial nerve (C6-8)