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gross anatomy > Posterior Compartment of Forearm Muscles > Flashcards

Posterior Compartment of Forearm Muscles Flashcards

1
Q

what are the 6 superficial muscles of the posterior compartment of the forearm

A
  1. brachioradialis
  2. extensor carpi radialis longus
  3. extensor carpi radialis brevis
  4. extensor digitorum
  5. extensor carpi ulnaris
  6. extensor digiti minimi
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2
Q

what are the 5 deep muscles of the posterior compartment of the forearm

A
  1. supinator
  2. abductor pollicis longus
  3. extensor pollicis brevis
  4. extensor pollicis longus
  5. extensor indicis
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3
Q

what are the attachments of the brachioradialis

A

proximal: lateral 2/3 of supracondylar ridge of humerus
distal: distal end of radius

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4
Q

what is the torque of the brachioradialis

A

flexor torque on the forearm (no wrist)

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5
Q

what is the innervation and blood supply of the brachioradialis

A

radial nerve (C5, C6, C7)
radial recurrent artery

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6
Q

what are the attachments of the extensor carpi radialis longus

A

proximal: lateral supracondylar ridge of humerus
distal: base of 2nd metacarpal

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7
Q

what is the torque of the extensor carpi radialis longus

A

extensor & abductor on hand at wrist
maintains neutral wrist when making a fist

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8
Q

what are the innervations and blood supply of extensor carpi radialis longus

A

radial nerve (C6 & C7)
radial recurrent artery

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9
Q

what are the attachments of the extensor carpi radialis brevis

A

proximal: lateral epicondyle of humerus
distal: base of 3rd metacarpal

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10
Q

what is the torque of the extensor carpi radialis brevis

A

extensor & abductor on hand at wrist

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11
Q

what is the innervation and blood supply of the extensor carpi radialis brevis

A

deep branch radial nerve (C7 & C8)
radial artery

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12
Q

what are the attachments of the extensor digitorum

A

proximal: lateral epicondyle of humerus
distal: extensor expansions digits 2,3,4

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13
Q

what is the torque of the extensor digitorum

A

extensor digits 2,3,4 on MP & IP joints
extensor on manus at wrist

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14
Q

what is the innervation and blood supply of the extensor digitorum

A

posterior interosseus nerve (C7 & C8)
interosseous recurrent & posterior interosseous artery

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15
Q

what are the attachments of the extensor carpi ulnaris

A

proximal: lateral epicondyle of humerus & posterior boarder of ulna
distal: base of 5th metacarpal

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16
Q

what is the torque of the extensor carpi ulnaris

A

extensor & adductor on hand at wrist

17
Q

what is the innervation and blood supply of the extensor carpi ulnaris

A

posterior interosseus nerve (C7 & C8)
ulnar artery

18
Q

what are the attachments of the extensor digiti minimi

A

proximal: lateral epicondyle of humerus
distal: extensor explansion of 5th digit

19
Q

what is the torque of the extensor digiti minimi

A

extensor 5th digit at MP joint and IP joints

20
Q

what is the innervation and blood supply to the extensor digiti minimi

A

posterior interosseus nerve (C7 & C8)
interosseous recurrent artery

21
Q

what are the attachments of the supinator

A

proximal: lateral epicondyle of humerus, radial collateral & annular ligaments, supinator fossa & proximal crest of ulna

distal: lateral, posterior & anterior surfaces of proximal 1/3 of radius

22
Q

what is the torque of the supinator

A

supinates the forearm

23
Q

what are the innervations and blood supply to the supinator

A

deep branch of radial nerve (C7 & C8)
recurrent interosseous artery

24
Q

what are the attachments of the abductor pollicis longus

A

proximal: posterior surface of ulna, interosseous membrane & radius
distal: base of 1st metacarpal

25
Q

what is the torque of the abductor pollicis longus

A

abductor & extensor thumb at carpometacarpal (CM) joint

26
Q

what innervates and provides blood supply to the abductor pollicis longus

A

posterior interosseous nerve (C7 & C8)
posterior interosseous artery

27
Q

what are the attachments of the extensor pollicis brevis

A

proximal: posterior surfaces of radius & interosseous membrane
distal: base of proximal phalanx of thumb

28
Q

what is the torque of the extensor pollicis brevis

A

extensor on proximal phalanx of thumb at CM & MCP joints
extensor and abductor at hand

29
Q

what is the innervation and blood supply to the extensor pollicis brevis

A

posterior interosseous nerve (C7 & C8)
posterior interosseous artery

30
Q

what are the attachments of the extensor pollicis longus

A

proximal: posterior surface of middle 1/3 of ulnar & interosseous membrane
distal: base of distal phalanx of thumb

31
Q

what is the torque of the extensor pollicis longus

A

extensor on distal phalanx thumb at CM, MCP, & IP joints

32
Q

what innervates and supplies blood to the extensor pollicis longus

A

posterior interosseous nerve (C7 & C8)
posterior interosseous artery

33
Q

what makes up the anatomical snuff box

A

extensor pollicis longus
extensor pollicis brevis

34
Q

what are the attachments of the extensor indicis

A

proximal: posterior surface of ulna & interosseous membrane
distal: extensor expansion of 2nd digit

35
Q

what is the torque of the extensor indicis

A

extensor on the 2nd digit

36
Q

what is the innervation and blood supply to the extensor indicis

A

posterior interosseous nerve (C7 & C8)
posterior interosseous artery

gross anatomy (9 decks)

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