Movements of the Wrist and Hand

Question 1

What type of joint is the intercarpal joint?

Answer 1

plane, synovial, provide stability at the base of the hand

Question 2

What type of joint is the interphalangeal joint?

Answer 2

hinge, synovial, flexion and extension

Question 3

What type of joint is the metacarpophalangeal joint?

Answer 3

condyloid, synovial

Question 4

Radio-carpal (wrist) joint

Answer 4

• synovial, condyloid
• palmar radiocarpal, dorsal radiocarpal, ulnar collateral, radial collateral
• biaxial: flex/ext, radio, ulnar deviation

Question 5

What are the muscles of the posterior forearm?

Answer 5

brachioradialis, extensor carpi radialis, longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensory carpi ulnaris

Question 6

Brachioradialis

Answer 6

P: prox 2/3 supracondylar ridge of humerus
D: lat dist surface of radius
A: weak elbow flexor (drinkers muscle) (doesn’t cross wrist joint)
I: radial nerve

Question 7

Extensor carpi radialis longus

Answer 7

P: lat supracondylar ridge of humerus
D: dorsal aspect base off 2nd metacarpal
A: wrist ext, radial deviation (abd)
I: radial

Question 8

Extensor carpi radialis brevis

Answer 8

P: lat epicondyle humerus
D: dorsal aspect base 3rd metacarpal
A: wrist ext and radial deviation
I: deep branch radial

Question 9

Extensor digitorum

Answer 9

P: lat epicondyle humerus
D: extensor expansions of digits 2-4
A: wrist, metacarpalphalangeal and interphalangeal joint extension
I: deep branch radial nerve

Question 10

Extensor digiti minimi

Answer 10

P: lat epicondyle of humerus
D: extensor expansion of 5th digit
A: metacarpalphalangeal and interphalangeal joints extension
I: deep branch radial

Question 11

Extensor carpi ulnaris

Answer 11

P: lat epicondyle humerus and post border of ulna
D: dorsal aspect base of 5th metavarpal
A: wrist ext and ulnar deviation (add)
I: deep branch radial

Question 12

What are the posterior forearm muscles?

Answer 12

supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis

Question 13

Supinator

Answer 13

P: lat epicondyle humerus, radial collateral and anular ligaments, crest of ulna
D: lat surface proc 1/3 radius
A: supination of forearm
I: deep branch radial

Question 14

Abductor pollicis longus

Answer 14

P: post surface prox 1/2 ulna, radius, IOM
D: base of 1st metacarpal
A: carpalmetacarpal joint abduction and ext of 1st digit
I: post interosseous (radial)

Question 15

Extensor pollicis brevis

Answer 15

P: post surface distal 1/3 radius and IOM
D: dorsal aspect base of prox phalanx 1st digit
A: thumb extension
I: post interosseous (radial)

Question 16

Extensor pollicis longus

Answer 16

P: post surface middle 1/3 ulna and IOM
D: dorsal aspect base of distal phalanx of 1st digit
A: extension of 1st digit
I: post interosseous (radial)

Question 17

Extensor indicis

Answer 17

P: post surface distal 1/3 ulna and IOM
D: extensor expansion 2nd digit
A: extension of second digit
I: post interosseous (radial)

Question 18

What are the three regions of the hand?

Answer 18

hypothenar, thenar and central

Question 19

What are the superficial muscles of the hand?

Answer 19

abductor digiti minimi, palmaris brevis, flexor pollicis previs, abductor pollicis brevis

Question 20

What are the middle muscles of the hand?

Answer 20

Flexor digiti minimi brevis, opponens digiti minimi, flexor pollicis brevis, opponens pollicis, abductor pollicis brevis

Question 21

What are the deep muscles of the hand?

Answer 21

opponens digiti minimi, adductor pollicis

Question 22

Carpal tunnel syndrome

Answer 22

median nerve

Question 23

Ulnar canal syndrome

Answer 23

ulnar nerve

Question 24

Handlebar neuropathy

Answer 24

ulnar nerve