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Anatomy > Posterior Forearm, Hand > Flashcards

Posterior Forearm, Hand Flashcards

1
Q

name the muscles in the superficial layer of the posterior forearm

A 
brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum 
extensor digiti minimi
extensor carpi ulnaris 
anconeus
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2
Q

name the muscles in the deep layer of the posterior forearm

A 
supinator 
abductor pollicis longus 
extensor pollicis brevis
extensor pollicis longus
extensor indicis
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3
Q

which muscle in the superficial posterior forearm is involved with extension of the elbow

A

anconeus muscle

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4
Q

which muscles in the superficial posterior forearm are involved with flexion at the elbow

A

brachioradialis

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5
Q

which muscles in the superficial posterior forearm are involved with extension of the wrist or digits?

A 
extensor carpi radialis longus 
extensor carpi radialis brevis
extensor digitorum 
extensor digiti minimi 
extensor carpi ulnaris
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6
Q

name the muscles in the deep layer of the posterior forearm

A 
supinator
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus 
extensor indicis
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7
Q

which muscles pass through the first compartment of the extensor retinaculum

A

abductor pollicis longus
extensor pollicis brevis

(long abductor and short extensor of the thumb)

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8
Q

which muscles pass through the second compartment of the extensor retinaculum

A

extensor carpi radialis longus

extensor carpi radialis brevis

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9
Q

which muscles pass through the third compartment of the extensor retinaculum

A

extensor pollicis longus

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10
Q

which muscles pass through the fourth compartment of the extensor retinaculum

A 
extensor digitorum 
extensor indicis (usually more medial)
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11
Q

which muscles pass through the fifth compartment of the extensor retinaculum

A

extensor digiti minimi

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12
Q

which muscles pass through the sixth compartment of the extensor retinaculum

A

extensor carpi ulnaris

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13
Q

which muscles of the posterior forearm do not pass through the extensor retinaculum?

A

brachioradialis
anconeus
supinator

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14
Q

compartment?

extensor digiti minimi

A

5th

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15
Q

compartment?

extensor carpi ulnaris

A

6th

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16
Q

compartment?

extensor indicis
extensor digitorum

A

4th

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17
Q

compartment?

extensor pollicis longus

A

3rd

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18
Q

compartment?

abductor pollicis longus
extensor pollicis brevis

A

1st

19
Q

compartment?

extensor carpi radialis longus
extensor carpi radialis brevis

A

2nd

20
Q 
origin = lateral supracondylar ridge of humrus
insertion = distal radius above styloid process
innervation = main trunk of radial nerve
action = flexes forearm at elbow
A

brachioradialis

21
Q 
origin = lateral supercondylar ridge of humerus 
insertion = base of second metacarpal 
innervation = main trunk of radial nerve
action = extensor of the wrist

passes through second compartment under extensor retinaculum

A

extensor carpi radialis longus

22
Q 
origin = lateral epicondyle of humerus
insertion = base of third metacarpal 
innervation = deep branch of radial nerve
action = exstensor of the wrist

passes through second compartment under extensor retinaculum

A

extensor carpi radialis brevis

23
Q 
origin = lateral epicondyle of humerus
insertion = extensor hood to middle and distal phalanges of four fingers
innervation = posterior interosseous nerve
action = extensor of digits

passes through fourth compartment under extensor retinaculum

A

extensor digitorum

24
Q 
origin = lateral epicondyle of humerus
insertion = extensor hood of little finger
innervation = posterior interosseous nerve
action = flexor of the little finger

passes through fifth compartment under extensor retinaculum

A

extensor digiti minimi

25
Q 
origin = lateral epicondyle
insertion = base of fifth metacarpal
innervation = posterior interosseous nerve 
action = flexor of the wrist

passes though sixth compartment under extensor retinaculum

A

extensor carpi ulnaris

26
Q 
origin = lateral epicondyle
insertion = upper quarter of ulna
innervation = main trunk of radial nerve
action = extensor of the elbow
A

anconeus

27
Q 
origin = lateral epiconyle of ulna 
insertion= medial surface of radius 
innervation = deep branch of radial nerve 
action = rotator of radius over ulna
A

supinator

28
Q

origin = radius and ulna
insertion = base of first metacarpal
innervation = posterior interosseous nerve
action =abduction of thumb

muscle of anatomical snuff box
goes through the first compartment under extensor retinaculum

A

abductor pollicis longus

29
Q 
origin = radius
insertion = proximal phalanx of thumb
innervation = proximal interosseous nerve
action = extensor of thumb

muscle of anatomical snuff box
goes through the first compartment under extensor retinaculum

A

extensor pollicis brevis

30
Q 
origin = ulna
insertion = base of distal phalanx of thumb
innervation = posterior interosseous nerve
action = extensor of the thumb

muscle of anatomical snuff box
goes through the third compartment under extensor retinaculum

A

extensor pollicis longus

31
Q 
origin = ulna
insertion = extensor hood of index finger
innervation = posterior interosseous nerve
action = extensor of the index finger

goes through fourth compartment under extensor retinaculum

A

extensor indicis

32
Q

extensor pollicis brevis

A 
origin = radius
insertion = proximal phalanx of thumb
innervation = proximal interosseous nerve
action = extensor of thumb

muscle of anatomical snuff box
goes through the first compartment under extensor retinaculum

33
Q

extensor pollicis longus

A 
origin = ulna
insertion = extensor hood of index finger
innervation = posterior interosseous nerve
action = extensor of the index finger

goes through fourth compartment under extensor retinaculum

34
Q

abductor pollicis brevis

A 
origin = ulna
insertion = base of distal phalanx of thumb
innervation = posterior interosseous nerve
action = extensor of the thumb

muscle of anatomical snuff box
goes through the third compartment under extensor retinaculum

35
Q

extensor indicis

A 
origin = ulna
insertion = extensor hood of index finger
innervation = posterior interosseous nerve
action = extensor of the index finger

goes through fourth compartment under extensor retinaculum

36
Q

supinator

A 
origin = lateral epiconyle of ulna 
insertion= medial surface of radius 
innervation = deep branch of radial nerve 
action = rotator of radius over ulna
37
Q

brachioradialis

A 
origin = lateral supracondylar ridge of humrus
insertion = distal radius above styloid process
innervation = main trunk of radial nerve
action = flexes forearm at elbow
38
Q

extensor carpi radialis longus

A 
origin = lateral supercondylar ridge of humerus 
insertion = base of second metacarpal 
innervation = main trunk of radial nerve
action = extensor of the wrist

passes through second compartment under extensor retinaculum

39
Q

extensor carpi radialis brevis

A 
origin = lateral epicondyle of humerus
insertion = base of third metacarpal 
innervation = deep branch of radial nerve
action = exstensor of the wrist

passes through second compartment under extensor retinaculum

40
Q

extensor digitorum

A 
origin = lateral epicondyle of humerus
insertion = extensor hood to middle and distal phalanges of four fingers
innervation = posterior interosseous nerve
action = extensor of digits

passes through fourth compartment under extensor retinaculum

41
Q

extensor digiti minimi

A 
origin = lateral epicondyle of humerus
insertion = extensor hood of little finger
innervation = posterior interosseous nerve
action = flexor of the little finger

passes through fifth compartment under extensor retinaculum

42
Q

extensor carpi ulnaris

A 
origin = lateral epicondyle
insertion = base of fifth metacarpal
innervation = posterior interosseous nerve 
action = flexor of the wrist

passes though sixth compartment under extensor retinaculum

43
Q

anconeus

A 
origin = lateral epicondyle
insertion = upper quarter of ulna
innervation = main trunk of radial nerve
action = extensor of the elbow

Anatomy (19 decks)

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