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MSK > 15. Dissection of the Posterior Forearm and Dorsum of the Hand > Flashcards

15. Dissection of the Posterior Forearm and Dorsum of the Hand Flashcards

1
Q

What is the action of flexor carpi ulnaris?

A

Flexes & adducts the wrist joint

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2
Q

What is the action of palmaris longus?

A

Flexes wrist joint, resists shearing forces when gripping

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3
Q

What is the action of flexor carpi radialis?

A

Flexes & abducts the wrist

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4
Q

What is the action of pronator teres?

A

Pronation

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5
Q

What is the action of flexor digitorum superficialis?

A

Flexes PIPJs of 4 fingers, can also flex MCP joints of 4 fingers & flex wrist

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6
Q

What is the action of flexor digitorum profundus?

A

Flexes DIP joints of 4 fingers, flexes MCP of 4 fingers & flexes wrist

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7
Q

What is the action of flexor pollicis longus?

A

Flexes interphalangeal joint of the thumb
Flexes MCP joint of thumb

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8
Q

What is the action of pronator quadratus?

A

Pronation

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9
Q

What is the action of brachioradialis?

A

Accessory flexor of elbow when forearm is mid-pronated.

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10
Q

What is the action of extensor carpi radialis longus?

A

Extends and abducts the wrist

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11
Q

What is the action of extensor carpi radialis brevis?

A

Extends and abducts the wrist

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12
Q

What is the action of extensor digitorum?

A

Extends 4 fingers & wrist

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13
Q

What is the function of extensor digiti minimi?

A

Extends the little finger

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14
Q

What is the function of extensor carpi ulnaris?

A

Extends and adducts the wrist

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15
Q

What is the function of the anconeus?

A

Abduction of the ulna in pronation
Accessory extensor of the elbow joint

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16
Q

What is the function of supinator?

A

Supination

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17
Q

What is the function of abductor pollicis longus?

A

Abducts carpometacarpal joint of thumb
Accessory extensor of the thumb

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18
Q

What is the function of extensor pollicis brevis?

A

Extends the MCP joint of the thumb
Can extend the carpometacarpal joint of the thumb

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19
Q

What is action of extensor pollicis longus?

A

Extends the interphalangeal joint of the thumb
Can also extend carpometacarpal and metacarpophalangeal joints of the thumb

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20
Q

What is the action of extensor indicis?

A

Extends the index finger

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21
Q

What is the innervation of flexor carpi ulnaris?

A

Ulnar nerve

22
Q

What is the innervation of palmaris longus?

A

Median nerve

23
Q

What is the innervation of flexor carpi radialis?

A

Median nerve

24
Q

What is the innervation of pronator teres?

A

Median nerve

25
Q

What is the innervation of flexor digitorum superficialis?

A

Median nerve

26
Q

What is the innervation of flexor digitorum profundus?

A

Lateral half = median nerve

Medial half = ulnar nerve

27
Q

What is the innervation of flexor pollicis longus?

A

Median nerve

28
Q

What is the innervation of pronator quadratus?

A

Median nerve

29
Q

What is the innervation of brachioradialis?

A

Radial nerve (before division)

30
Q

What is the innervation of extensor carpi radialis longus?

A

Radial nerve

31
Q

What is the innervation of extensor carpi radialis brevis?

A

Deep branch of radial nerve

32
Q

What is the innervation of extensor digitorum?

A

Posterior interosseous nerve

33
Q

What is the innervation of extensor digiti minimi?

A

Posterior interossoeous nerve

34
Q

What is the innervation of extensor carpi ulnaris?

A

Posterior interossoeous nerve

35
Q

What is the innervation of anconeus?

A

Radial nerve

36
Q

What is the innervation of supinator?

A

Posterior interosseous nerve

37
Q

What is the innervation of abductor pollicis longus?

A

Posterior interosseous nerve

38
Q

What is the innervation of extensor pollicis brevis?

A

Posterior interosseous nerve

39
Q

What is the innervation of extensor pollicis longus?

A

Posterior interosseous nerve

40
Q

What is the innervation of extensor indicis?

A

Posterior interosseous nerve

41
Q

Which muscle in the posterior compartment of the forearm is innervated by the radial nerve but acts to flex the forearm at the elbow joint in the mid-prone position?

A

Brachioradialis

42
Q

The deep branch of the radial nerve becomes the posterior interosseous nerve after it has pierced through which muscle?

A

Supinator

43
Q

Which vein arises from the medial aspect of the dorsal venous arch?

A

Basilic

44
Q

Which muscle tendon forms the medial boundary of the anatomical snuffbox?

A

Extensor pollicis longus

45
Q

Which two carpal bones from the floor of the anatomical snuffbox?

A

Trapezium and scaphoid

46
Q

The extensor carpi ulnaris acts to extend the hand at the wrist joint but also medially deviate (adduct) the hand at the wrist joint. True or False?

A

True

47
Q

The superficial branch of the radial nerve descends to provide sensory innervation to the dorm of the hand and the lateral (radial) 3.5 digits?

A

True

48
Q

The radial artery travels over the floor of the anatomical snuffbox with the deep branch of the radial nerve and the cephalic vein. True or False?

A

False

49
Q

The dorsal interossei muscles act to adduct the digits at the MCP joints. True or False?

A

False

50
Q

The anconeus muscle acts to extend the forearm at the elbow joint. True or False?

A

True

MSK (21 decks)

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