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wrist and hand muscles > extrinsic muscles of the finger > Flashcards

extrinsic muscles of the finger Flashcards

1
Q

extrinsic muscles

A

originate in the forearm and insert in the hand

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2
Q

what extrinsic muscles attach to the medial epicondyle

A

flexor digitorum superficialis, flexor pollicis longus

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3
Q

what flexor muscle does not attach to the medial epicondyle

A

flexor digitorum profundus

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4
Q

what extrinsic muscles attach to the lateral epicondyle

A

extensor digitorum, extensor digit minimi

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5
Q

flexor digitorum superficialis does what

A

Flexes fingers 2-5 @ mcp, PIP FLEXION

wrist flexion

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6
Q

flexor digitorum superficials attachments

A

medial epicondyle, coroniod of ulna, proximal radius ->

anterior surface of the middle phalanges/phalanx 2-5

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7
Q

flexor digitorum profundus does what

A

flexes fingers 2-5 mcp, pip, DIP FLEXION

wrist flexions

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8
Q

Only muscle that flexes the DIPs in fingers 2-5

A

flexor digitorum profundus

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9
Q

flexor digitorum profundus attachments

A

medial anterior ulna and interosseus membrane ->

distal phalanx fingers 2-5

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10
Q

Avulsion of Jersey FInger. what muscle is involved

A

flexor digitorum profundus

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11
Q

flexor pollicis longus does what

A

flexes thumb @ cmc, mcp, IP JOINT

flex wrist

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12
Q

What is the only muscle that flexes the thumb at the IP joint

A

flexor pollicis longus

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13
Q

flexor pollicis longus attachments

A

anterior surface of radius, interosseus membrane, medial epicondyle, coroniod of ulna ->
distal phalanx of the thumb

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14
Q

Extensor Digitorum/ Common extensor attachments

A

lateral epicondyle -> extensor hood of phalanges 2-5

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15
Q

What muscle is involved in Boutoniere deformity and mallet finger

A

extensor digitorum or common extensor

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16
Q

what does the extensor digitorum do

A

Extends finger 2-5 MCP,PIP, DIP

extends wrist

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17
Q

Mallet Finger

A

Distal Avulsion/ Droops in extensor digitorum

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18
Q

Boutonniere deformity

A

Central Slip Avulsion/ flexion and hyperextension

19
Q

Extensor Digitorum is in what dorsal compartment

A

compartment 4

20
Q

Extensor Digit Minimi is in what dorsal compartment

A

compartment 5

21
Q

extensor digiti minimi does what

A

Small finger extension @ MCP, PIP, DIP

wrist extension

22
Q

extensor digiti minimi attachments

A

lateral epicondyle -> extensor expansion of 5th metacarpal (small finger)

23
Q

what are the muscles of the extrinis deep distal group

A

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

24
Q

what muscles form the snuff box

A

extensor pollicis longus & extensor pollicis brevis

25
Q

what muscles form the DeQuarvain disease

A

abductor pollicis longus & extensor pollicis brevis 1st dorsal compartment

26
Q

Abductor pollicis longus attachments

A

posterior radius and ulna -> lateral side base of the thumb/ MCP joint of thumb

27
Q

what does the Abductor pollicis longus do

A

ABducts the thumb at the CMC joint

extends thumb at CMC joint

28
Q

what compartment is the ABductor pollicis longus

A

compartment one

29
Q

what compartment is the extensor pollicis brevis in

A

dorsal compartment one

30
Q

what does the extensor pollicis brevis do

A

extends the thumb @ cmc, MCP joints

Abducts the thumb @ CMC joint

31
Q

what two muscles can Abduct the thumb at the CMC Joint

A

Abductor pollicis longus and extensor pollicis brevis

32
Q

Attachments of the extensor pollicis brevis

A

posterior radius, interosseous membrane ->

base of the PROXIMAL phalanx of the thumb (1st metacarpal)

33
Q

Extensor pollicis longus is in what dorsal compartment

A

3rd dorsal compartment

34
Q

Extensor pollicis longus does what

A

extends the thumb @ CMC, MCP, IP joints

35
Q

what muscle overlies the radial artery

A

extensor pollicis longus

36
Q

what is the attachments of the extensor pollicis longus

A

posterior ulna, interosseous membrane ->

base of the DISTAL phalanx of the thumb (1st metacarpal)

37
Q

extensor indicis is in what doral compartment

A

dorsal compartment number 4

38
Q

what does the extensor indicis do

A

extends index finger (3rd metacarpal) @ MCP, PIP, DIP joints

extends wrist

39
Q

what are the extensor indicis attachments

A

posterior ulna & interosseous membrane -> dorsal expansion of index finger

40
Q

muscle used in tendon transfer

A

extensor indicis

41
Q

what muscles are in compartment 1

A

abductor pollicis longus

extensor pollicis brevis

42
Q

what muscles are in compartment 3

A

extensor pollicis longus

43
Q

what muscles are in compartment 4

A

extensor digitorum

extensor indicis

44
Q

what muscles are in compartment 5

A

extensor digit minimi

wrist and hand muscles (3 decks)

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