Questions Hand

The skin of the index finger: 1 is supplied by the ulnar nerve

2 is supplied by the median nerve

3 is supplied by the radial nerve

4 is supplied by the lateral cutaneous nerve of forearm

5 corresponds to the C8 dermatome

 The median nerve supplies the skin on the volar ie, palmar aspectThe radial nerve supplies the skin on the dorsal aspect, except for the nailbed area which is of course supplied by the median nerveThe skin over the index finger corresponds to the C6 dermatome, not C8

The skin of the index finger: 1 is supplied by the ulnar nerve F

2 is supplied by the median nerve T

3 is supplied by the radial nerve T

4 is supplied by the lateral cutaneous nerve of forearm

F

5 corresponds to the C8 dermatome F

The ulnar artery 1 lies lateral to the ulnar nerve at the wrist

2 passes deep to the flexor retinaculum

3 gives rise to the common interosseous artery in the cubital region

4 is the major contributor to the deep palmar arterial arch

5 is overlapped by the palmaris longus tendon at the level of the wrist

The ulnar artery is usually the major contributor to the superficial palmar arterialarch, while the radial artery is the chief contributor to the deep palmar arterial arch 

The ulnar artery 1 lies lateral to the ulnar nerve at the wrist T

2 passes deep to the flexor retinaculum F

3 gives rise to the common interosseous artery in the cubital region

T

4 is the major contributor to the deep palmar arterial arch F

5 is overlapped by the palmaris longus tendon at the level of the wrist

F

The following structures lie within the carpal tunnel1 ulnar nerve

2 ulnar artery

3 Palmaris longus tendon

4 Flexor pollicis longus tendon

5 Pronator quadratus

The carpal tunnel is the space that lies between the flexor retinaculum (transverse carpal ligament) and the ventral surface of the articulated carpus. The ulnar nerve, ulnar artery and the tendon of palmaris longus run superficial to the flexor retinaculum and thus are not within the carpal tunnel. Flexor pollicis longus enters the carpal tunnel before reaching its insertion on the distal phalanx of the thumb. Pronator quadratus is confined to the distal forearm and does not reach the carpal tunnel.

The following structures lie within the carpal tunnel1 ulnar nerve F

2 ulnar artery F

3 Palmaris longus tendon F

4 Flexor pollicis longus tendon T

5 Pronator quadratus F

Concerning the interosseous muscles of the hand:1 Dorsal interossei adduct the fingers

2 Palmar interossei abduct the fingers

3 dorsal interossei are innervated by the median nerve

4 the palmar interossei arise from the tendons of flexor digitorum profundus

5 the radial artery runs through the first dorsal interosseous muscle

Palmar interossei Adduct the fingers while dorsal interossei Abduct the fingers: remember the mnemonic Pad & Dab Both palmar and dorsal interossei are innervated by the ulnar nerve The lumbricals, not the interossei, arise from the tendons of FDP)

Concerning the interosseous muscles of the hand:1 Dorsal interossei adduct the fingers F

2 Palmar interossei abduct the fingers F

3 dorsal interossei are innervated by the median nerve F

4 the palmar interossei arise from the tendons of flexor digitorum profundus

F

5 the radial artery runs through the first dorsal interosseous muscle

T

The ulnar nerve supplies: 1 adductor pollicis

2 flexor carpi ulnaris

3 flexor pollicis longus

4 all palmar interossei

5 all lumbricals

FPL is innervated by the anterior interosseous nerve – the deep branch of the median nerveThe radial two lumbricals are innervated by the median nerve

The ulnar nerve supplies: 1 adductor pollicis T

2 flexor carpi ulnaris T

3 flexor pollicis longus F

4 all palmar interossei T

5 all lumbricals F

Transection of the ulnar nerve at the proximal border of flexor retinaculum causes:1 paralysis of all interossei

2 paralysis of all lumbricals

3 paralysis of abductor pollicis brevis

4 Froment’s sign

5 loss of sensation on the ulnar side of the dorsum of hand

The radial two lumbricals are innervated by the median nerveAPB is innervated by the (recurrent motor branch of) median nerveFroment’s sign is the inability to keep a sheet of paper gripped between the thumb and closed fist, and is due to paralysis of adductor pollicis which is supplied by the ulnar nerve.The ulnar side of the dorsum of the hand is innervated by the dorsal branches of theulnar nerve but these are given off several cms proximal to the flexor retinaculum

Transection of the ulnar nerve at the proximal border of flexor retinaculum causes:1 paralysis of all interossei T

2 paralysis of all lumbricals F

3 paralysis of abductor pollicis brevis F

4 Froment’s sign T

5 loss of sensation on the ulnar side of the dorsum of hand

F

Extensor expansions of the fingers (dorsal digital expansions):1 are enclosed in synovial sheaths

2 receive the insertions of the dorsal interossei

3 receive the insertions of the palmar interossei

4 are inserted into the terminal phalanx of the digit

5 receive the insertions of the lumbricals

Extensor expansions of the fingers (dorsal digital expansions):1 are enclosed in synovial sheaths F

2 receive the insertions of the dorsal interossei T

3 receive the insertions of the palmar interossei T

4 are inserted into the terminal phalanx of the digit T

5 receive the insertions of the lumbricals T

The Median nerve:1 passes deep to the flexor retinaculum

2 supplies skin over the tip of the little finger

3 supplies adductor pollicis

4 supplies the first dorsal interosseous

5 supplies abductor pollicis longus

The skin of the little finger is ulnar nerve territoryAll interossei, palmar and dorsal are supplied by the ulnar nerveAbductor pollicis longus is supplied by the posterior interosseous nerve; branch of the radial nerve  

The Median nerve:1 passes deep to the flexor retinaculum T

2 supplies skin over the tip of the little finger F

3 supplies adductor pollicis F

4 supplies the first dorsal interosseous F

5 supplies abductor pollicis longus F

The flexor retinaculum of the hand:1 gives partial attachment to abductor pollicis brevis

2 is attached to the pisiform bone

3 lies superficial to the median nerve

4 forms the roof (ventral boundary) of the carpal tunnel

5 is attached to the lunate bone

The flexor retinaculum of the hand:1 gives partial attachment to abductor pollicis brevis T

2 is attached to the pisiform bone T

3 lies superficial to the median nerve T

4 forms the roof (ventral boundary) of the carpal tunnel

T

5 is attached to the lunate bone F

ulnar nerve supplies all the palmar interossei and all the dorsal interossei and adductor pollicis

The ulnar nerve supplies muscles which cause1 adduction of the fingers

2 abduction of the fingers

3 adduction of thumb

4 abduction of thumb

5 flexion of the distal interphalangeal joint of the index finger

ulnar nerve supplies all the palmar interossei and all the dorsal interossei and adductor pollicis

The ulnar nerve supplies muscles which cause1 adduction of the fingers T

2 abduction of the fingers T

3 adduction of thumb T

4 abduction of thumb F

5 flexion of the distal interphalangeal joint of the index finger

F

A distal humeral fracture causing complete transection of the ulnar nerve at the level of the medial epicondyle will produce1 impairment of flexion of the distal interphalangeal joint of

index finger

2 cutaneous sensory loss over the medial aspect of the hand

3 weakness of pinch between index finger and thumb

4 wrist drop

5 wasting of all intrinsic muscles of the hand

Weakness of pinch is a consequence of paralysis of the adductor pollicis and 1st dorsal interosseousWrist drop is caused by a radial nerve injuryThe median nerve supplies the thenar muscles and lateral two lumbricals which are also intrinsic muscles

A distal humeral fracture causing complete transection of the ulnar nerve at the level of the medial epicondyle will produce1 impairment of flexion of the distal interphalangeal joint of

index fingerF

2 cutaneous sensory loss over the medial aspect of the hand T

3 weakness of pinch between index finger and thumb T

4 wrist drop F

5 wasting of all intrinsic muscles of the hand F

Which of the following statements are true?1 The median nerve lies lateral to the ulnar nerve at the

wrist

2 The lumbricals flex the MCP joints of digits 2-5

3 The dorsal interossei abduct the fingers

4 Adductor pollicis attaches to the 4th metacarpal

5 Adductor pollicis attaches to the 1st metacarpal

Which of the following statements are true?1 The median nerve lies lateral to the ulnar nerve at the

wristT

2 The lumbricals flex the MCP joints of digits 2-5 T

3 The dorsal interossei abduct the fingers T

4 Adductor pollicis attaches to the 4th metacarpal F

5 Adductor pollicis attaches to the 1st metacarpal F

The transverse head of adductor pollicis arises from the whole of the shaft of the 3rd metacarpal and attaches to the base of the proximal phalanx of the 1st digit. It does not have any attachment to the 1st metacarpal