The Extensor Forearm & Hand II Flashcards Preview

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Flashcards in The Extensor Forearm & Hand II Deck (32):
1

muscles of the hand:
thenar muscles (3)

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis

2

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

nerve

action(s)

median nerve

abducts thumb

3

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

nerve

action(s)

median nerve

flexes thumb

4

muscles of the hand:
thenar muscles:
opponens pollicis:

nerve

action(s)

median nerve

opposes thumb

5

muscles of the hand:
adductor compartment (1)

adductor pollicis

6

muscles of the hand:
adductor compartment:
adductor pollicis:

nerve

action(s)

ulnar nerve

adducts thumb

7

muscles of the hand:
hypothenar muscles (3)

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

8

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

nerve

action(s)

ulnar nerve

abducts little finger

9

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

nerve

action(s)

ulnar nerve

flexes little finger

10

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

nerve

action(s)

ulnar nerve

opposes little finger
deepens palm

11

muscles of the hand:
lumbrical muscles:

nerve

action(s)

median nerve
ulnar nerve

flexes metacarpophalangeal joints (knuckle)
extends interphalangeal joint

12

muscles of the hand:
interosseous muscles (2)

palmar interosseous muscles
dorsal interosseous muscles

13

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

nerve

action(s)

ulnar nerve

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

14

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

nerve

action(s)

ulnar nerve

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

15

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

rearrangement

superficialis tendons
proximal phalanges
profundus tendons

profundus tendons

16

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

superficialis tendons
middle phalanges

profundus tendon
superficialis tendon
distal phalanx

17

muscles of the hand:
vincula:

there is a ___ & ___ vinculum for each tendon

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

short & long

blood vessels
periosteum

18

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

oblique bands
medial four digits

extensor indicis tendon

19

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)

extensor digiti minimi

dorsal extensor expansion

interosseous muscles
lumbrical muscles

20

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

proximal phalanx

middle phalanx

distal phalanx

21

arteries of the palm (2)

ulnar artery
radial artery

22

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 ___ & ___

flexor retinaculum
ulnar nerve
pisiform bone

deep ulnar branch
abductor digiti minimi
flexor digiti minimi

23

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

superficial palmar arch

superficial palmar branch
radial artery

24

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 ___

thumb
radial side of the index finger

radial artery
deep palmar arch

25

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

superficial palmar branch
anatomical snuff box

first dorsal interosseous muscle

deep palmar arch
deep branch of the ulnar artery

26

arteries of the palm:
radial artery:

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

radialis indicis artery
princeps pollicis artery

27

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 ___

index finger

thumb

28

nerves of the palm (2)

median nerve
ulnar nerve

29

nerves of the palm:
median nerve:

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

deep
carpal tunnel

30

nerves of the palm:
median nerve:

motor:
- ___ muscles
- ___ muscles

sensory:
- (medial/lateral) palm
- ___ aspect of the (medial/lateral) ___

thenar muscles
first two lumbrical muscles

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

31

nerves of the palm:
ulnar nerve:

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

supreficial
pisiform bone

32

nerves of the palm:
ulnar nerve:

motor:
- ___ muscles
- ___ muscles
- ___
- ___
- all ___ muscles

sensory:
- (medial/lateral) palm
- ___ aspect of the ___

hypothenar muscles
third & fourth lumbrical muscles
adductor pollicus
palmaris brevis
all interossei muscles

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

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