dorsal forearm and dorsum of the hand

Question 1

origin of brachioradialis

Answer 1

distal humerus, lateral intermuscular septum

Question 2

insertion of brachioradialis

Answer 2

styloid process of the radius

Question 3

innervation brachioradialis

Answer 3

radial n. (C5,C6)

Question 4

action of brachioradialis

Answer 4

elbow flexion, forearm supination

Question 5

origin of extensor carpi radialis longus

Answer 5

lateral supracondylar ridge of distal humerus, lateral intermuscular septum

Question 6

insertion of extensor carpi radialis longus

Answer 6

2nd metacarpal (base)

Question 7

innervation of extensor carpi radialis longus

Answer 7

radial n. (C6-C7)

Question 8

action of extensor carpi radialis longus

Answer 8

weak elbow flexion, wrist extension and radial deviation

Question 9

origin of extensor carpi radialis brevis

Answer 9

lateral epicondyle of humerus

Question 10

insertion of extensor carpi radialis brevis

Answer 10

3rd metacarpal (base)

Question 11

innervation of extensor carpi radialis brevis

Answer 11

radial n. (C7,C8)

Question 12

action of extensor carpi radialis brevis

Answer 12

weak elbow flexion, wrist extension and radial deviation

Question 13

origin of extensor digitorum

Answer 13

lateral epicondyle of humerus

Question 14

insertion of extensor digitorum

Answer 14

Dorsal digital expansion of 2nd-5th digits

Question 15

innervation of extensor digitorum

Answer 15

posterior interosseous branch of the radial n. (C7-C8)

Question 16

action of extensor digitorum

Answer 16

wrist extension, extension and abduction of 2nd to 5th digits

Question 17

origin of extensor digiti minimi

Answer 17

lateral epicondyle of humerus

Question 18

insertion of extensor digiti minimi

Answer 18

dorsal digital expansion of 5th digit

Question 19

innervation of extensor digiti minimi

Answer 19

radial n. (C7-C8)

Question 20

action of extensor digiti minimi

Answer 20

wrist extension, ulnar abduction of hand

Question 21

origin of extensor carpi ulnaris

Answer 21

lateral epicondyle of the humerus, dorsal surface of ulnar head

Question 22

insertion of extensor carpi ulnaris

Answer 22

base of 5th metacarpal

Question 23

innervation of extensor carpi ulnaris

Answer 23

radial n. (C7-C8)

Question 24

action of extensor carpi ulnaris

Answer 24

wrist extension, adduction of hand

Question 25

origin of abductor pollicis longus

Answer 25

radius and ulna (dorsal surfaces, interosseous membrane)

Question 26

insertion of abductor pollicis longus

Answer 26

base of 1st metacarpal

Question 27

innervation of abductor pollicis longus

Answer 27

posterior interosseous branch of the radial n. (C7,C8)

Question 28

action of abductor pollicis longus

Answer 28

radiocapal joint: abduction of the hand | abduction of thumb

Question 29

origin of extensor pollicis longus

Answer 29

ulna (posterior surface) and interosseous membrane

Question 30

insertion of extensor pollicis longus

Answer 30

base of distal phalanx of thumb

Question 31

innervation of extensor pollicis longus

Answer 31

posterior interosseous branch of the radial n. (C7-C8)

Question 32

action of extensor pollicis longus

Answer 32

Wrist extension and abduction of hand | Adduction and extension of thumb

Question 33

origin of extensor pollicis brevis

Answer 33

radius (posterior surface) and interosseous membrane

Question 34

insertion of extensor pollicis brevis

Answer 34

base of proximal phalanx of thumb

Question 35

innervation of extensor pollicis brevis

Answer 35

posterior interosseous branch of the radial n. (C7-C8)

Question 36

action of extensor pollicis brevis

Answer 36

Abduction of hand at Radiocarpal joint | Extension of thumb

Question 37

origin of extensor indicis

Answer 37

ulna (posterior surface) and interosseous membrane

Question 38

insertion of extensor indicis

Answer 38

posterior digital extension of 2nd digit

Question 39

innervation of extensor indicis

Answer 39

posterior interosseous branch of the radial n. (C7-C8)

Question 40

action of extensor indicis

Answer 40

wrist extension, extension of 2nd digit

Question 41

origin of supinator

Answer 41

olecranon, lateral epicondyle of humerus, radial collateral ligament, annular ligament of radius

Question 42

insertion of supinator

Answer 42

radius (between radial tuberosity and insertion of pronator teres)

Question 43

innervation of supinator

Answer 43

posterior interosseous branch of the radial n. (C6,C7)

Question 44

action of supinator

Answer 44

radioulnar joints: supination

Question 45

what muscles are in the 1st compartment of the dorsum of the hand?

Answer 45

EPB, APL

Question 46

what muscles are in the 6th compartment of the dorsum of the hand?

Answer 46

ECU

Question 47

what muscles are in the 2nd compartment of the dorsum of the hand?

Answer 47

ECRB, ECRL

Question 48

what muscles are in the 3rd compartment of the dorsum of the hand?

Answer 48

EPL

Question 49

what muscles are in the 4th compartment of the dorsum of the hand?

Answer 49

EI, ED

Question 50

what muscles are in the 5th compartment of the dorsum of the hand?

Answer 50

EDM