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Tri 3 - Gross Anatomy II > E1F > Flashcards

E1F Flashcards

Hand

1
Q

flexor fibrous sheaths

A

head of metacarpal to base of distal phalanges

thumb: flexor pollicis longus
digits: flexor digitorum superficially and profundus

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2
Q

short muscles of the thumb

A

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis
adductor pollicis (not part of thenar eminence)

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3
Q

abductor pollicis brevis origin

A

scaphoid, trapezium and flexor retinaculum

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4
Q

abductor pollicis brevis insertion

A

lateral aspect of base of proximal phalanx of thumb, together with flexor pollicis brevis (small sesamoid bone is present in common tendon of insertion)

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5
Q

abductor pollicis brevis innervation

A

recurrent branch median nerve

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6
Q

abductor pollicis brevis action

A

abduction of thumb at metacarpophalangeal and carpometacarpal joints

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7
Q

flexor pollicis brevis origin

A

trapezium and flexor retinaculum

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8
Q

flexor pollicis brevis insertion

A

lateral aspect of base of proximal phalanx of thumb, together with abductor pollicis brevis (small sesamoid bone is present in common tendon of insertion)

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9
Q

flexor pollicis brevis innervation

A

median nerve (recurrent branch)

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10
Q

flexor pollicis brevis action

A

flexion of thumb at metacarpophalangeal and carpometacarpal joints

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11
Q

opponens pollicis origin

A

trapezium and flexor retinaculum

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12
Q

opponens pollicis insertion

A

lateral aspect of shaft of 1st metacarpal

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13
Q

opponens pollicis innervation

A

median nerve (recurrent branch)

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14
Q

opponens pollicis action

A

opposition of thumb (acts only at carpometacarpal joint)

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15
Q

adductor pollicis origin

A

oblique head: originates from bases of 2nd and 3rd metacarpals and capitate
transverse head: originates from shaft of 3rd metacarpal

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16
Q

adductor pollicis insertion

A

medial aspect of base of proximal phalanx of thumb (small sesamoid bone is present in common tendon of insertion)

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17
Q

adductor pollicis innervation

A

deep branch of ulnar nerve

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18
Q

adductor pollicis action

A

adduction of thumb at metacarpophalangeal and carpometacarpal joints

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19
Q

hypothenar eminence

A

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi

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20
Q

abductor digiti minimi origin

A

pisiform bone

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21
Q

abductor digiti minimi insertion

A

medial side of base of proximal phalanx of little finger

22
Q

abductor digiti minimi innervation

A

deep branch ulnar nerve

23
Q

abductor digiti minimi action

A

abduction of little finger (mainly at metacarpophalangeal joint)

24
Q

flexor digiti minimi brevis origin

A

hook of hamate and flexor retinaculum

25
Q

flexor digiti minimi brevis insertion

A

medial side of base of proximal phalanx of little finger

26
Q

flexor digiti minimi brevis innervation

A

deep branch ulnar nerve

27
Q

flexor digiti minimi brevis action

A

flexion of little finger (mainly at metacarpophalangeal joint)

28
Q

opponens digiti minimi origin

A

hook of hamate and flexor retinaculum

29
Q

opponens digiti minimi insertion

A

medial aspect of shaft of 5th metacarpal

30
Q

opponens digiti minimi innervation

A

deep branch of ulnar nerve

31
Q

opponens digiti minimi action

A

flexion and lateral rotation of 5th metacarpal (at carpometacarpal joint)  helps to bring little finger into opposition with thumb

32
Q

lumbrical muscles origin

A

tendons of flexor digitorum profundus

33
Q

lumbrical muscles insertion

A

lateral side of extensor expansions of 2nd to 5th digits

34
Q

lumbrical muscles innervation

A

1 and 2 median

3 and 4 deep ulnar

35
Q

lumbrical muscles action

A

flexion of metacarpophalangeal joints and extension of interphalangeal joints

36
Q

palmar interossei origin

A

from metacarpal of corresponding digit (2nd, 4th and 5th metacarpals)

37
Q

palmar interossei insertion

A

1st palmar interosseous: medial side of base of proximal phalanx of index finger
2nd and 3rd palmar interossei : lateral side of base of proximal phalanx of ring and little fingers (all of them also insert into extensor expansion of corresponding digit)

38
Q

palmar interossei innervation

A

deep ulnar

39
Q

palmar interossei action

A

adduct digits at metacarpophalangeal joints

flex metacarpophalangeal joints and extend interphalangeal joints

40
Q

dorsal interossei insertion

A

1st: lateral side of base of proximal phalanx of index finger
2nd and 3rd: lateral and medial sides, respectively, of base of proximal phalanx of middle finger
4th: medial side of base of proximal phalanx of ring finger (all of them also insert into extensor expansion of corresponding digit)

41
Q

dorsal interossei innervation

A

deep ulnar

42
Q

dorsal interossei action

A

abduct digits at metacarpophalangeal joints

flex metacarpophalangeal joints and extend interphalangeal joints

43
Q

ulnar artery

A
  1. enters hand anterior (superficial) to flexor retinaculum and gives off deep palmar branch (accompanies deep branch of ulnar nerve) then continues into palm as superficial palmar arch
  2. superficial palmar arch is a direct continuation of ulnar artery and curves laterally, deep to palmar aponeurosis, and superficial to long flexor tendons then completed laterally by superficial palmar branch of radial artery
  3. superficial palmar arch gives off palmar digital arteries and usually supply medial side of index finger and both sides of middle, ring and little fingers
44
Q

radial artery

A
  1. after running through anatomical snuffbox, it leaves dorsum of hand by passing between two heads of 1st dorsal interosseous muscle and then passes between two heads of adductor pollicis and continues medially as deep palmar arch
  2. in the plane between 1st dorsal interosseous and adductor pollicis muscles, it usually gives off branches for thumb and lateral side of index finger (princeps pollicis and radialis indicis arteries, respectively)
  3. deep palmar arch is a direct continuation of radial artery and curves medially, deep to long flexor tendons then completed medially by deep palmar branch of ulnar artery
  4. deep palmar arch gives off palmar metacarpal arteries, which join palmar digital branches of superficial palmar arch
45
Q

median nerve

A

enters palm of hand through carpal tunnel

46
Q

muscular branches

median nerve

A

recurrent branch : supplies 3 muscles of thenar eminence

branches to 1st and 2nd lumbrical muscles

47
Q

cutaneous branches median

A

palmar digital branches: supply palmar aspect of lateral 3½ digits and distal part of dorsal aspect of same digits

48
Q

ulnar nerve

A

enters palm of hand anterior (superficial) to flexor retinaculum and divides into superficial and deep terminal branches

49
Q

superficial branch

ulnar nerve

A
  1. muscular branch to palmaris brevis
  2. cutaneous branches: palmar digital branches and supply palmar aspect of medial 1½ digits and distal part of dorsal aspect of same digits
50
Q

deep branch

ulnar nerve

A
  1. passes through hypothenar eminence and then runs with deep palmar arch
  2. gives muscular branches to: 3 hypothenar muscles, all interossei (palmar and dorsal), 3rd and 4th lumbricals and both heads of adductor pollicis
51
Q

ulnar canal (of Guyon)

A

located medially, on anterior aspect of wrist

contains ulnar nerve and ulnar artery and veins

52
Q

ulnar canal (of Guyon) boundaries

A
  1. floor (posterior wall): flexor retinaculum (transverse carpal ligament)
  2. roof (anterior wall): palmar (volar) carpal ligament (fibrous band, continuous with deep fascia of forearm, that blends laterally with flexor retinaculum)
  3. proximal (superior): pisiform
  4. distal (inferior): hook of hamate

Tri 3 - Gross Anatomy II (20 decks)

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