Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Musculoskeletal (Milly's) > Muscles Of The Hand > Flashcards

Muscles Of The Hand Flashcards

1
Q

What is the difference between the extrinsic and intrinsic muscles of the hand?

A

Extrinsic- located in the anterior and posterior compartments of the forearm, they control crude movements and produce a forceful grip

Intrinsic- located within the hand itself, they are responsible for the fine motor functions of the hand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many intrinsic muscles of the hand are there? Name them

A 
6:
Adductor pollicis 
Palmaris Blevins
Interossei
Lumbricals
Thenar 
Hypothenar
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What nerve innervates the thenar muscles?

A

Median

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How many muscles make up the thenar eminance, name them?

A

3:
Opponens pollicis
Abductor pollicis Brevis
Flexor pollicis Brevis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where does the opponens pollicis lie in relation to the other thenar muscles in the hand?

A

Largest and lies underneath them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the attachments of the opponens pollicis, one of the thenar muscles in the hand?

A

Originates from the tubercle of the trapezium and associated flexor retinaculum

Inserts into the lateral margin of the metacarpal of the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the action of the opponens pollicis, one of the thenar muscles in the hand?

A

Opposed the thumb, by medially rotating and flexing the metacarpal on the trapezium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What nerve innervates the opponens pollicis, one of the thenar muscles in the hand?

A

Median nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

In relation to the other thenar muscles of the hand, where is the abductor pollicis Brevis ?

A

Found anteriorly to the opponens pollicis and proximal to the flexor pollicis brevis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the attachments of the abductor pollicis brevis, one of the thenar muscles in the hand?

A

Originates from the tubercles of the scaphoid and trapezium and from the associated flexor retinaculum

Attaches to the lateral side of proximal phalanx of the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the action of the abductor pollicis brevis, one of the thenar muscles in the hand?

A

Abducts the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What nerve innervates the abductor pollicis brevis, one of the thenar muscles in the hand?

A

Median

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where is the flexor pollicis brevis muscle in relation to the other thenar muscles of the hand?

A

Most distal of the muscles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the attachments of the flexor pollicis brevis, one of the thenar muscles in the hand?

A

Originates from the tubercle of the trapezium and from the associated flexor retinaculum

Attaches to the base of the proximal phalanx of the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the action of the flexor pollicis brevis, one of the thenar muscles in the hand?

A

Flexes the metacarpophalangeal (MCP) join of the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What nerve innervates the flexor pollicis brevis, one of the thenar muscles in the hand?

A

Median

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How many muscles make up the hypothenar eminence? Name them

A

3:
Opponens digiti minimi,
Abductor digiti minimi and flexor digiti minimi brevis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

In relation to the other hypothenar muscles, where is the opponens digiti minimi muscle of the hypothenar eminence in the hand?

A

Lies deep to the others

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are the attachments of the opponens digiti minimi muscle of the hypothenar eminence in the hand?

A

Originates from the hook of hamate and associated flexor retinaculum

Inserts into the medial margin of metacarpal V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the action of the opponens digiti minimi muscle of the hypothenar eminence in the hand?

A

Rotaries the metacarpal of the little finger towards the palm, producing opposition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What nerve innervates the opponens digiti minimi muscle of the hypothenar eminence in the hand?

A

Ulnar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

In relation to the other muscles of the hypothenar, where is the abductor digiti minimi muscle of the hypothenar eminence in the hand?

A

Most superficial muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What are the attachments of the abductor digiti minimi muscle of the hypothenar eminence in the hand?

A

Originates from the pisiform and the tendon of the flexor carpi ulnaris

Attaches to the base of the proximal phalanx of the little finger

24
Q

What is the action of the abductor digiti minimi muscle of the hypothenar eminence in the hand?

A

Abducts the little finger

25
Q

What nerve innervates the abductor digiti minimi muscle of the hypothenar eminence in the hand?

A

Ulnar

26
Q

In relation to the other. Hypothenar muscles, where is the flexor digiti minimi brevis muscle of the hypothenar eminence in the hand?

A

Lies laterally to the abductor digiti minimi

27
Q

What are the attachments of the flexor digiti minimi brevis muscle of the hypothenar eminence in the hand?

A

Originates from the hook of hamate and adjacent flexor retinaculum

Inserts into the base of the proximal phalanx of the little finger

28
Q

What is the action of the flexor digiti minimi brevis muscle of the hypothenar eminence in the hand?

A

Flexes the MCP joint of the little finger

29
Q

What nerve innervates the flexor digiti minimi brevis muscle of the hypothenar eminence in the hand?

A

The ulnar nerve

30
Q

How many lumbricals are there in the hand and what are each associated with?

A

4, 1 for each finger

31
Q

What do the lumbricals in the hand link?

A

The extensor tendons to the flexor tendons

32
Q

Denervation of the lumbricals of the hand is the basis for what conditions?

A

Ulnar claw

Hand of benediction

33
Q

What are the attachments of the lumbricals of the hand?

A

Each originates from a tendon of the flexor digitorum profundus

Insert into extensor hood

34
Q

What root do the lumbricals take along the fingers?

A

Travel dorsally and laterally to the finger

35
Q

What is the action of the lumbricals of the hand?

A

Flexion at the MCP joint and extend at the IP joints of each finger

36
Q

What nerve innervates the lumbricals of the hand?

A

Two medial lumbricals- ulnar nerve

Two lateral lumbricals- median nerve

37
Q

Where are interossei muscles found?

A

Between the metacarpals

38
Q

What are the 2 interossei muscle groups called?

A

Dorsal interossei

Palmar interossei

39
Q

What are the attachments of the dorsal interossei muscles of the hand?

A

Each originates from the lateral and medial surfaces of the metacarpals

Attach into the extensor hood and proximal phalanx of each finger

40
Q

What is the action of the dorsal interossei muscles of the hand?

A

Abducts the fingers at the MCP joint

And assists the lumbricals in flexion at MCP joints and extension at the IP joints

41
Q

What nerve innervates the dorsal interossei of the hand?

A

Ulnar nerve

42
Q

How many dorsal interossei muscles are there?

A

4

43
Q

How many palmar interossei muscles are there?

A

3

44
Q

What are the attachments of the palmar interossei muscles of the hand?

A

Each originates form the medial or lateral surface of a metacarpal

Attaches to the extensor hood and proximal phalanx

45
Q

What are the actions of the palmar interossei muscles of the hand?

A

Adduction of the fingers at the MCP joint

And assists the lumbricals in flexion at MCP joints and extension at the IP joints

46
Q

What nerve innervates the palmar interossei?

A

Ulnar nerve

47
Q

Name the two other muscles found in the hand that are neither lumbricals, interossei, hypothenar nor thenar muscles

A

Palmaris brevis and adductor pollicis

48
Q

What is the palmaris brevis?

A

Small, thin muscles found very superficially in the subcutaneous tissue of the hypothenar eminence

49
Q

What are the attachments of the palmaris brevis muscle in the hand?

A

Originates from the palmar aponeurosis and flexor retinaculum

Attaches to the dermis of the skin on the medial margin of the hand

50
Q

What is the action of the palmaris brevis in the hand?

A

Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip

51
Q

What nerve innervates the palmaris brevis muscle of the hand?

A

Ulnar nerve

52
Q

What is the adductor pollicis muscle of the hand?

A

Large triangular muscle with two heads- forms the deep Palmar arch

53
Q

What is the interaction of the radial artery and the adductor pollicis?

A

The radial artery passes anteriorly through the space between the two heads

54
Q

What are the attachments of the adductor pollicis muscle of the hand?

A

One head- from metacarpal 3
One head- from capitate and adjacent areas of metacarpals 2 and 3

Attach into the base of the proximal phalanx of the thumb

55
Q

What is the action of the adductor pollicis muscle of the hand?

A

Adductor of the thumb

56
Q

What nerve innervates the adductor pollicis?

A

Ulnar nerve

57
Q

What nerve innervates the hypothenar eminence?

A

The ulnar nerve

Musculoskeletal (Milly's) (28 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions