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Upper Limb > Extensor-Supinator Muscles of Forearm > Flashcards

Extensor-Supinator Muscles of Forearm Flashcards

1
Q

Origin of Brachioradialis

A

Proximal 2.3 of supra-epicondylar ridge of humerus

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2
Q

Inserion of Brachioradialis

A

Lateral distal end of radius proximal to styloid process

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3
Q

Innervation of Brachioradialis

A

Radial Nerve

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4
Q

Action of brachioradialis

A

Weak flexion of forearm: Maximal in mid-pronated position

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5
Q

Origin of extensor carpi radialis longus

A

Lateral supra-epicondylar ridge of humerus

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6
Q

Insertion of extensor carpi radialis longus

A

Dorsal aspect of base of 2nd metacarpal

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7
Q

Innervation of Extensor carpi radialis longus

A

radial nerve

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8
Q

action of Extensor carpi radialis longus

A

extend hand
abduct hand
fist clenching

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9
Q

origin or extensor carpi radialis brevis

A

common extensor origin

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10
Q

Insertion of extensor carpi radialis brevis

A

dorsal aspect of base of 3rd metacarpal

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11
Q

Innervation of extensor carpi radialis brevis

A

deep branch of radial nerve

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12
Q

action of extensor carpi radialis brevis

A

extends hand
abducts hand
fist clenching

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13
Q

Origin of extensor digitorum

A

common extensor origin

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14
Q

insertion of extensor digitorum

A

extensor expansions of medial 4 digits

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15
Q

Innervation of extensor digitorum

A

deep branch of radial nerve

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16
Q

action of extensor digitorum

A

extends medial 4 digits mostly at metacarpophalangeal joints

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17
Q

origin of extensor digiti minimi

A

common extensor origin

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18
Q

Insertion of extensor digiti minimi

A

extensor expansion of 5th digit

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19
Q

innnervation of extensor digiti minimi

A

deep branch of radial nerve

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20
Q

action of extensor digiti minimi

A

extends 5th digit mostly at metacarpophalangeal joint

21
Q

Origin of extensor carpi ulnaris

A

Common extensor origin

Posterior border of ulna via shared aponeurosis

22
Q

Insertion of extensor carpi ulnaris

A

dorsal aspect of base of 5th metacarpal

23
Q

innervation of extensor carpi ulnaris

A

deep branch of radial nerve

24
Q

action of extensor carpi ulnaris

A

extends hand
adducts hand
first clenching

25
Q

Origin of supinator

A

lateral epicondyle of humerus
radial collateral and annular liaments
supinator fossa
crest of ulna

26
Q

Insertion of supinator

A

Lateral third of radius on the lateral, posterior and anterior sides

27
Q

Innervation of supinator

A

deep branch of radial nerve

28
Q

Action of supinator

A

supinates forearm

29
Q

Origin of extensor indicis

A

Posterior surface of distal 1/3 of ulna

Interosseous membrane

30
Q

insertion of extensor indicis

A

extensor expansion of 2nd digit

31
Q

innervation of extensor indicis

A

posterior interosseous nerve (continuation of deep radial artery)

32
Q

action of extensor indicis

A

extends 2nd digit

extends hand

33
Q

Origin of abductor pollicis longus

A

Posterior proximal half of ulna, radius and interosseous membrane

34
Q

Insertion of abductor pollic longus

A

base of 1st metacarpal

35
Q

Innervation of abductor pollicis longus

A

posterior interosseous nerve (continuation of deep radial artery)

36
Q

Action of abductor pollicis longus

A

abducts thumb

extends it at carpometacarpal joint

37
Q

Origin of extensor pollicis longus

A

Posterior middle 1/3 of ulna and interosseous membrane

38
Q

Insertion of extensor pollicis longus

A

Dorsal aspect of base of distal phalanx of thumb

39
Q

Innervation of extensor pollicis longus

A

posterior interosseous nerve (continuation of deep radial artery)

40
Q

Action of extensor pollicis longus

A

extends distal phalanx of thumb

extends carpophalangeal and carpometacarpal joints

41
Q

Origin of extensor pollicis brevis

A

posterior surface of distal third of radius

adjacent interosseous membrane

42
Q

Insertion of extensor pollicis brevis

A

dorsal aspect of proximal base of thumb

43
Q

Innervation of extensor pollicis brevis

A

posterior interosseous nerve (continuation of deep radial artery)

44
Q

Action of extensor pollicis brevis

A

extends proximal phalanx of thumb

extends carpometacarpal joint

45
Q

Which muscles constitute the Superficial Posterior Group

A

Extensor Carpi Ulnararis
Extensor Digiti Minimi
Extensor Digitorum
Anconeus

46
Q

Which muscles constitutes the Deep Snuffbox Group

A

Abductor Pollis Longus
Extensor Pollis Longus
Extensor Pollis Brevis

47
Q

Which muscles constitute the Deep “Other” group

A

Supinator

Extensor Indicis

48
Q

Which muscles constitute the superficial lateral group

A

Extensor carpi radialis longus
Extensor carpi radialis brevis
Brachioradialis

Upper Limb (10 decks)

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