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(J) Muscles > Hand and Wrist Muscles > Flashcards

Hand and Wrist Muscles Flashcards

1
Q

What is the proximal attachment of the extensor indicis?

A

-posterior distal thrid of ulna

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2
Q

What is the distal attachment of the extensor indicis?

A

-extensor expansion of second digit

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3
Q

What innervates the extensor indicis?

A

-posterior interosseous nerve

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4
Q

What is the blood supply of the extensor indicis?

A

-branches of the interosseous artery

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5
Q

What are the actions of the extensor indicis?

A

-extension of second digit

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6
Q

What is the proximal attachment of the opponens pollicis?

A
  • flexor retinaculum

- tubercles of scaphoid and trapezium

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7
Q

What is the distal attachment of the opponens pollicis?

A

-lateral first metacarpal

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8
Q

What innervates the opponens pollicis?

A

-recurrent branch of median nerve

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9
Q

What is the blood supply of the opponens pollicis?

A

-radial artery

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10
Q

What are the actions of the opponens pollicis?

A
  • opposition of thumb

- medial rotation of thumb

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11
Q

What is the proximal attachment of the abductor pollicis brevis?

A
  • flexor retinaculum

- tubercles of scaphoid and trapezium

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12
Q

What is the distal attachment of the abductor pollicis brevis?

A

-lateral base of proximal first phalanx

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13
Q

What innervates the abductor pollicis brevis?

A

-recurrent branch of median nerve

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14
Q

What is the blood supply of the abductor pollicis brevis?

A

-radial artery

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15
Q

What are the actions of the abductor pollicis brevis?

A
  • abduction of thumb

- aids in opposition of thumb

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16
Q

What is the proximal attachment of the flexor pollicis brevis?

A
  • flexor retinaculum

- tubercles of scaphoid and trapezium

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17
Q

What is the distal attachment of the flexor pollicis brevis?

A

-lateral base of proximal first phalanx

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18
Q

What innervates the flexor pollicis brevis?

A
  • recurrent branch of median nerve

- deep branch of ulnar nerve

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19
Q

What is the blood supply of the flexor pollicis brevis?

A

-radial artery

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20
Q

What are the actions of the flexor pollicis brevis?

A

-flexion of thumb

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21
Q

What is the proximal attachment of the adductor pollicis?

A
  • base of second and third metacarpals (oblique head)

- capitate and adjacent carpals (transverse head

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22
Q

What is the distal attachment of the adductor pollicis?

A

-medial base of proximal phalanx

23
Q

What innervates the adductor pollicis?

A

-deep branch of ulnar nerve

24
Q

What is the blood supply of the adductor pollicis?

A

-radial artery

25
Q

What are the actions of the adductor pollicis?

A

-adducts thumb

26
Q

What is the proximal attachment of the abductor digiti minimi?

27
Q

What is the distal attachment of the abductor digiti minimi?

A

-medial base of proximal fifth phalanx

28
Q

What is the innervation of the abductor digiti minimi?

A

-deep branch of ulnar nerve

29
Q

What is the blood supply of the abductor digiti minimi?

A

-ulnar artery

30
Q

What are the actions of the abductor digiti minimi?

A
  • abducts fifth digit

- assists in flexion of 5 proximal phalanx

31
Q

What is the proximal attachment of the flexor digiti minimi (brevis)?

A
  • hook of hamate

- flexor retinaculum

32
Q

What is the distal attachment of the flexor digiti minimi?

A

-medial base of proximal fifth phalanx

33
Q

What innervates the flexor digiti minimi?

A

-deep branch of ulnar nerve

34
Q

What is the blood supply of the flexor digiti minimi?

A

-ulnar artery

35
Q

What are the actions of the flexor digiti minimi?

A

-flexion of the fifth metacarpal

36
Q

What is the proximal attachment of the opponens digiti minimi?

A
  • hook of hamate

- flexor retinaculum

37
Q

What is the distal attachment of the opponens digiti minimi?

A

-medial border of fifth metacarpal

38
Q

What innervates the opponens digiti minimi?

A

-deep branch of ulnar nerve

39
Q

What is the blood supply of the opponens digiti minimi?

A

-ulnar artery

40
Q

What are the actions of the opponens digiti minimi?

A

-brings fifth metacarpal into opposition with the thumb

41
Q

What are the proximal attachments of the dorsal interossei?

A

-adjacent sides of metacarpals (first and second; second and third; third and fourth; fourth and fifth)

42
Q

What is the distal attachment of the dorsal interossei?

A

-extensor expansions of digits 2-4 (medial second proximal phalanx; medial and lateral thrid proximal phalanx; lateral fourth proximal phalanx)

43
Q

What innervates the dorsal interossei?

A

-ulnar nerve

44
Q

What are the actions of the dorsal interossei?

A

-abduction of digits 2-4

45
Q

What are the proximal attachments of the palmar interossei?

A

-sides of first, second, fourth, and fifth metacarpals (medial; medial; lateral; lateral)

46
Q

What are the distal attachments of the palmar interossei?

A

-sides of proximal first, second, fourth, and fifth proximal phalanges (lateral; lateral; medial; medial)

47
Q

What innervates the palmar interossei?

A

-ulnar nerve (all)

48
Q

What is the action of the palmar interossei?

A

-adduction of first, second, fourth and fifth digits

49
Q

What are the proximal attachments of the lumbricals?

A

-lateral sides of the flexor digitorum profundus tendons (digits 2-5)

50
Q

What are the distal attachments of the lumbricals?

A

-lateral extensor expansion (digits 2-5)

51
Q

What innervates the lumbircals?

A
  • median nerve (lateral two lumbircals)

- ulnar nerve (medial two lumbircals)

52
Q

What is the blood supply of the lumricals?

A

-branches of the radial and ulnar arteries

53
Q

What is the action of the lumbricals?

A
  • flexion of MCP 2-5

- extension of IP joints 2-5

(J) Muscles (4 decks)

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