The Extensor Forearm & Hand II Flashcards

1
Q
muscles of the hand:
thenar muscles (3)
A

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis

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2
Q

muscles of the hand:
thenar muscles:
abductor pollicis brevis:

nerve

action(s)

A

median nerve

abducts thumb

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3
Q

muscles of the hand:
thenar muscles:
flexor pollicis brevis:

nerve

action(s)

A

median nerve

flexes thumb

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4
Q

muscles of the hand:
thenar muscles:
opponens pollicis:

nerve

action(s)

A

median nerve

opposes thumb

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5
Q
muscles of the hand:
adductor compartment (1)
A

adductor pollicis

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6
Q

muscles of the hand:
adductor compartment:
adductor pollicis:

nerve

action(s)

A

ulnar nerve

adducts thumb

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7
Q
muscles of the hand:
hypothenar muscles (3)
A

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

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8
Q

muscles of the hand:
hypothenar muscles:
abductor digiti minimi:

nerve

action(s)

A

ulnar nerve

abducts little finger

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9
Q

muscles of the hand:
hypothenar muscles:
flexor digiti minimi:

nerve

action(s)

A

ulnar nerve

flexes little finger

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10
Q

muscles of the hand:
hypothenar muscles:
opponens digiti minimi:

nerve

action(s)

A

ulnar nerve

opposes little finger
deepens palm

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11
Q

muscles of the hand:
lumbrical muscles:

nerve

action(s)

A

median nerve
ulnar nerve

flexes metacarpophalangeal joints (knuckle)
extends interphalangeal joint

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12
Q
muscles of the hand:
interosseous muscles (2)
A

palmar interosseous muscles

dorsal interosseous muscles

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13
Q

muscles of the hand:
interosseous muscles:
palmar interosseous muscles:

nerve

action(s)

A

ulnar nerve

flex metacarpophalangeal joints
extend interphalangeal joints
adduct fingers toward center of middle finger
(palmar adduct - PAD)

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14
Q

muscles of the hand:
interosseous muscles:
dorsal interosseous muscles:

nerve

action(s)

A

ulnar nerve

flex metacarpophalangeal joints
extend interphalangeal joints
abduct fingers from cetner of third finger
(dorsal abduct - DAB)

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15
Q

muscles of the hand:
insertion of the long flexor tendons:

pairs of superficial & deep flexor tendons must undergo ___ to reach their respective insertion sites

the ___ tendons split into two slips over the ___, then spiral around the sides of the ___ phalanges tendons & come together again dorsal to these tendons

this creates a tunnel for the ___ tendons

A

rearrangement

superficialis tendons
proximal phalanges
profundus tendons

profundus tendons

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16
Q

muscles of the hand:
insertion of the long flexor tendons:

the ___ tendons split again into two slips which insert into the sides of the ___ phalanges

each ___ tendon passes through the tunnel formed in the ___ tendon & inserts into the base of the ___ phalanx

A

superficialis tendons
middle phalanges

profundus tendon
superficialis tendon
distal phalanx

17
Q

muscles of the hand:
vincula:

there is a ___ & ___ vinculum for each tendon

the vinvula provide routes for ___ to reach the tendons from the ___

A

short & long

blood vessels
periosteum

18
Q

muscles of the hand:
insertion of the long extensor tendons:

strong ___ bands connect tendons of the ___ digits restricting their individual movement

the tendon to the index finger is joined medially by the ___ tendon

A

oblique bands
medial four digits

extensor indicis tendon

19
Q

muscles of the hand:
insertion of the long extensor tendons:

tendon to the little finger (when present) is joined medially by the double tendon of the ___

all tendons broaden over the knuckles to form the ___

the sides of the tendons beyond the knuckle joint receive the insertions of the:

  • ___ muscles (proximally)
  • ___ muscles (distally)
A

extensor digiti minimi

dorsal extensor expansion

interosseous muscles
lumbrical muscles

20
Q

muscles of the hand:
insertion of the long extensor tendons:

the dorsal extensor expansion splits into three slips over the ___ phalanx

the middle slip inserts into the base of the ___ phalanx

the lateral slips unite beyond the middle slip insertion & insert into the base of the ___ phalanx

A

proximal phalanx

middle phalanx

distal phalanx

21
Q

arteries of the palm (2)

A

ulnar artery

radial artery

22
Q

arteries of the palm:
ulnar artery:

enters the hand superficial to the ___ & lateral to the ___ nerve & ___ bone

gives off the ___ branch which passes b/n the ___ & ___

A

flexor retinaculum
ulnar nerve
pisiform bone

deep ulnar branch
abductor digiti minimi
flexor digiti minimi

23
Q

arteries of the palm:
ulnar artery:

the main trunk continues as the ___

this is completed on the lateral side by the ___ branch of the ___ artery

A

superficial palmar arch

superficial palmar branch
radial artery

24
Q

arteries of the palm:
ulnar artery:

the superficial palmar arch supplies branches to all sides of the fingers except:

  • ___
  • ___ side of the ___ finger

the deep branch of the ulnar artery joins the ___ artery to complete the ___

A

thumb
radial side of the index finger

radial artery
deep palmar arch

25
Q

arteries of the palm:
radial artery:

gives off the ___ branch just before entering the ___

passes deep b/n the two heads of the ___ muscle

continues as the ___ which is completed on the medial side of the hand by the ___ branch of the ___ artery

A

superficial palmar branch
anatomical snuff box

first dorsal interosseous muscle

deep palmar arch
deep branch of the ulnar artery

26
Q

arteries of the palm:
radial artery:

gives off two other important branches before continuing as the deep plamar arch (2)

A

radialis indicis artery

princeps pollicis artery

27
Q

arteries of the palm:
radial artery:

radialis indicis artery - supplies the lateral side of the ___

princeps pollicis artery - splits into two for the two sides of the ___

A

index finger

thumb

28
Q

nerves of the palm (2)

A

median nerve

ulnar nerve

29
Q

nerves of the palm:
median nerve:

enters the palm by passing (superficial/deep) to the flexor retinaculum within the ___

A

deep

carpal tunnel

30
Q

nerves of the palm:
median nerve:

motor:

  • ___ muscles
  • ___ muscles

sensory:

  • (medial/lateral) palm
  • ___ aspect of the (medial/lateral) ___
A

thenar muscles
first two lumbrical muscles

lateral palm
palmar aspect of the lateral 3 & 1/2 fingers

31
Q

nerves of the palm:
ulnar nerve:

enters the palm by passing (superficial/deep) to the flexor retinaculum immediately lateral to the ___ bone

A

supreficial

pisiform bone

32
Q

nerves of the palm:
ulnar nerve:

motor:

  • ___ muscles
  • ___ muscles
  • ___
  • ___
  • all ___ muscles

sensory:

  • (medial/lateral) palm
  • ___ aspect of the ___
A
hypothenar muscles
third & fourth lumbrical muscles
adductor pollicus
palmaris brevis
all interossei muscles

medial palm
palmar aspect of the medial 1 & 1/2 fingers