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Muscles of back/upper extremity > Forearm - posterior compartment > Flashcards

Forearm - posterior compartment Flashcards

1
Q

Posterior/extensor/supinator compartment of forearm - superficial

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

Posterior/extensor/supinator compartment of forearm - deep

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

Attachments of brachioradialis

A

Proximal: proximal 2/3 of lateral supracondylar ridge of humerus
Distal: lateral, distal radius proximal to styloid

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4
Q

Actions of brachioradialis

A

flexes forearm at elbow

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5
Q

Blood supply of brachioradialis

A

radial recurrent artery

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6
Q

Innervation of brachioradialis

A

superficial branch of radial nerve (C5, C6, C7)

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7
Q

Attachments of extensor carpi radialis longus

A

Proximal: lateral supracondylar ridge of humerus
Distal: base of 2nd metacarpal

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8
Q

Actions of extensor carpi radialis longus

A

extends and abducts hand at wrist

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9
Q

Innervations of extensor carpi radialis longus

A

radial nerve (C6, C7)

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10
Q

Attachments of extensor carpi radialis brevis

A

Proximal: lateral epicondyle of humerus
Distal: base of 3rd metacarpal

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11
Q

Actions of extensor carpi radialis brevis

A

extends and abducts hand at wrist

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12
Q

Innervations of extensor carpi radialis brevis

A

deep branch of radial nerve (C7, C8)

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13
Q

Attachments of extensor digitorum

A

Proximal: lateral epicondyle of humerus
Distal: extensor expansions of 2nd-5th digits

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14
Q

Actions of extensor digitorum

A

extends digits 2-5 at MCPs and IPs (all finger joints)

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15
Q

Innervation of extensor digitorum

A

deep branch of radial nerve (C7, C8)

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16
Q

Attachments of extensor digiti minimi

A

Proximal: lateral epicondyle of humerus
Distal: extensor expansion of 5th digit

17
Q

Actions of extensor digiti minimi

A

extends 5th digit at MCP and IP (joints)

18
Q

Innervation of extensor digiti minimi

A

deep branch of radial nerve (C7, C8)

19
Q

Attachments of extensor carpi ulnaris

A

Proximal: lateral epicondyle of humerus, posterior border of ulna
Distal: base of 5th metacarpal

20
Q

Actions of extensor carpi ulnaris

A

extends and adducts hand at wrist

21
Q

Innervation of extensor carpi ulnaris

A

deep branch of radial nerve (C7, C8)

22
Q

Attachments of supinator

A

Proximal: lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa, crest of ulna
Distal: lateral posterior and anterior proximal third of radius

23
Q

Actions of supinator

A

supinates forearm

24
Q

Innervation of supinator

A

deep branch of radial nerve (C7, C8)

25
Q

Attachments of extensor indicis

A

Proximal: distal third ulna and posterior interosseuous membrane
Distal: extensor expansion of 2nd digit

26
Q

Actions of extensor indicis

A

extends 2nd digit and hand at wrist

27
Q

Innervation of extensor indicis

A

posterior interosseous nerve (C7, C8) from deep branch of radial nerve

28
Q

Attachments of abductor pollicis longus

A

Proximal: proximal half of posterior ulna, radius, and interosseious membrane
Distal: base of 1st metacarpal

29
Q

Actions of abductor pollicis longus

A

abducts thumb and extends it at CMC joint

30
Q

Innervation of abductor pollicis longus

A

posterior interosseous nerve (C7, C8)

31
Q

Attachments of extensor pollicis longus

A

Proximal: middle third of posterior ulna and interosseous membrane
Distal: base of distal phalanx of thumb

32
Q

Actions of extensor pollicis longus

A

extends distal phalanx

33
Q

Innervation of extensor pollicis longus

A

posterior interosseous nerve (C7, C8)

34
Q

Innervation of extensor pollicis brevis

A

posterior interosseous nerve (C7, C8)

35
Q

Attachments of extensor pollicis brevis

A

Proximal: distal third of posterior radius and interosseous membrane
Distal: base of proximal phalanx of thumb

36
Q

Actions of extensor pollicis brevis

A

extends proximal phalanx

37
Q

Origin of extensor mass

A

lateral epicondyle of humerus

Muscles of back/upper extremity (12 decks)

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