The Extensor Forearm & Hand II

Question 1

muscles of the hand:
thenar muscles (3)

Answer 1

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis

Question 2

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

nerve

action(s)

Answer 2

median nerve

abducts thumb

Question 3

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

nerve

action(s)

Answer 3

median nerve

flexes thumb

Question 4

muscles of the hand:
thenar muscles:
opponens pollicis:

nerve

action(s)

Answer 4

median nerve

opposes thumb

Question 5

muscles of the hand:
adductor compartment (1)

Answer 5

adductor pollicis

Question 6

muscles of the hand:
adductor compartment:
adductor pollicis:

nerve

action(s)

Answer 6

ulnar nerve

adducts thumb

Question 7

muscles of the hand:
hypothenar muscles (3)

Answer 7

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

Question 8

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

nerve

action(s)

Answer 8

ulnar nerve

abducts little finger

Question 9

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

nerve

action(s)

Answer 9

ulnar nerve

flexes little finger

Question 10

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

nerve

action(s)

Answer 10

ulnar nerve

opposes little finger
deepens palm

Question 11

muscles of the hand:
lumbrical muscles:

nerve

action(s)

Answer 11

median nerve
ulnar nerve

flexes metacarpophalangeal joints (knuckle)
extends interphalangeal joint

Question 12

muscles of the hand:
interosseous muscles (2)

Answer 12

palmar interosseous muscles

dorsal interosseous muscles

Question 13

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

nerve

action(s)

Answer 13

ulnar nerve

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

Question 14

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

nerve

action(s)

Answer 14

ulnar nerve

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

Question 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

Answer 15

rearrangement

superficialis tendons
proximal phalanges
profundus tendons

profundus tendons

Question 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

Answer 16

superficialis tendons
middle phalanges

profundus tendon
superficialis tendon
distal phalanx

Question 17

muscles of the hand:
vincula:

there is a ___ & ___ vinculum for each tendon

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

Answer 17

short & long

blood vessels
periosteum

Question 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

Answer 18

oblique bands
medial four digits

extensor indicis tendon

Question 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)

Answer 19

extensor digiti minimi

dorsal extensor expansion

interosseous muscles
lumbrical muscles

Question 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

Answer 20

proximal phalanx

middle phalanx

distal phalanx

Question 21

arteries of the palm (2)

Answer 21

ulnar artery

radial artery

Question 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 ___ & ___

Answer 22

flexor retinaculum
ulnar nerve
pisiform bone

deep ulnar branch
abductor digiti minimi
flexor digiti minimi

Question 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

Answer 23

superficial palmar arch

superficial palmar branch
radial artery

Question 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 ___

Answer 24

thumb
radial side of the index finger

radial artery
deep palmar arch

Question 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

Answer 25

superficial palmar branch
anatomical snuff box

first dorsal interosseous muscle

deep palmar arch
deep branch of the ulnar artery

Question 26

arteries of the palm:
radial artery:

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

Answer 26

radialis indicis artery

princeps pollicis artery

Question 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 ___

Answer 27

index finger

thumb

Question 28

nerves of the palm (2)

Answer 28

median nerve

ulnar nerve

Question 29

nerves of the palm:
median nerve:

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

Answer 29

deep

carpal tunnel

Question 30

nerves of the palm:
median nerve:

motor:

• ___ muscles
• ___ muscles

sensory:

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

Answer 30

thenar muscles
first two lumbrical muscles

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

Question 31

nerves of the palm:
ulnar nerve:

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

Answer 31

supreficial

pisiform bone

Question 32

nerves of the palm:
ulnar nerve:

motor:

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

sensory:

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

Answer 32

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

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