Hand

Question 0

Where is the thenar eminence located?

Answer 0

the base of the thumb

Question 1

What are the two eminences of the palmar aspect of the hand?

Answer 1

thenar eminence and hypothenar eminence

Question 2

Where is the hypothenar eminence located?

Answer 2

proximal to the base of the 5th finger

Question 3

What are fibrous digital sheaths?

Answer 3

ligamentous tubes that enclose the flexor tendon(s) and the synovial sheaths that surround them

Question 4

Where is the medial fibrous septum located?

Answer 4

extends deeply from the medial border of the palmar aponeurosis to the 5th metacarpal

Question 5

Where is the hypothenar compartment located?

Answer 5

medial to the medial fibrous septum

Question 6

Where is the lateral fibrous septum located?

Answer 6

extends deeply from the lateral border of the palmer aponeurosis to the 3rd metacarpal; between the thenar and midpalmar space

Question 7

Where is the thenar compartment located?

Answer 7

lateral to the lateral fibrous septum

Question 8

Where is the central compartment located?

Answer 8

between the hypothenar and thenar compartments

Question 9

What does the central compartment contain?

Answer 9

flexor tendons and their sheaths, the lumbrical muscles, the superficial palmar arterial arch, and the digital vessels and nerves

Question 10

What is the deepest muscular plane of the palm?

Answer 10

adductor compartment

Question 11

What is located in thenar compartment?

Answer 11

abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis

Question 12

What is located in the hypothenar compartment?

Answer 12

abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi

Question 13

What is located in the adductor compartment?

Answer 13

adductor pollicis

Question 14

What is chiefly responsible for opposition of the thumb?

Answer 14

thenar muscles

Question 15

What muscles are responsible for abduction of the thumb?

Answer 15

APL and APB

Question 16

What muscles are responsible for adduction of the thumb?

Answer 16

adductor pollicis and 1st dorsal interosseous

Question 17

What muscles are responsible for extension of the thumb?

Answer 17

EPL, EPB, and APL

Question 18

What muscles are responsible for flexion of the thumb?

Answer 18

FPL and FPB

Question 19

What muscles are responsible for opposition of the thumb?

Answer 19

opponens pollicis

Question 20

What does the palmaris brevis do?

Answer 20

deepens hollow of palm; aids palmar grip; covers and protects the ulnar nerve and artery

Question 21

Where are the dorsal interosseous muscles located?

Answer 21

between the metacarpals

Question 22

Where are palmar interosseous muscles located?

Answer 22

on the palmar surfaces of the 2nd, 4th, and 5th metacarpals

Question 23

What muscles abduct the fingers?

Answer 23

dorsal interossei

Question 24

What muscles adduct the fingers?

Answer 24

palmar interossei

Question 25

The short muscles of the hand produce what motions?

Answer 25

flexion at the metacarpophalengeal joints and extension of the interphalangeal joints

Question 26

What prevents tendons from pulling away from the digits (bow-stringing)?

Answer 26

fibrous digital sheaths

Question 27

What is the tendinous chiasm?

Answer 27

split in the FDS tendon

Question 28

The tendons of the ____ and the ____ enter the common flexor sheath.

Answer 28

FDS; FDP

Question 29

The fibrous digital sheaths attach to the bones to form what structures?

Answer 29

osseofibrous tunnels

Question 30

What are anular and cruciform ligaments of the fibrous sheath?

Answer 30

thickened reinforcements of the sheaths

Question 31

Where does the ulnar artery enter the hand?

Answer 31

anterior to the flexor retinaculum between the pisiform and hook of hamate via the ulnar canal

Question 32

What is the main contributor to the superficial palmar arch?

Answer 32

ulnar artery

Question 33

The deep palmar branch arises from what vessel?

Answer 33

ulnar artery

Question 34

The superficial palmar arch gives rise to three ________ that anastomose with _________ from the deep palmar arch.

Answer 34

common palmar digital arteries; palmar metacarpal arteries

Question 35

The common palmar digital artery divides into what?

Answer 35

proper palmar digital arteries

Question 36

Where do the proper palmar digital arteries run?

Answer 36

along the adjacent sides of the 2nd to 4th fingers

Question 37

Where does the radial artery enter the palm?

Answer 37

between the heads of the 1st dorsal interosseous muscle

Question 38

Where does the radial artery end?

Answer 38

anastomosing with the deep branch of the ulnar artery to form the deep palmar arch

Question 39

What arises from the deep palmar arch?

Answer 39

three palmar metacarpal arteries and the princeps pollicis artery

Question 40

Where is the radialis indicis artery?

Answer 40

passes along the lateral side of the index finger

Question 41

What forms the dorsal venous network?

Answer 41

the dorsal digital veins drain into three dorsal metacarpal veins

Question 42

The ____ vein originates from the lateral side of the dorsal venous network and the _____ vein from the medial side.

Answer 42

cephalic; basilic

Question 43

What nerves supply the hand?

Answer 43

median, ulnar, and radial

Question 44

Where does the median nerve enter the hand?

Answer 44

through the carpal tunnel, deep to the flexor retinaculum; along with the tendons of the FDS, FDP, and FPL

Question 45

What is the carpal tunnel?

Answer 45

passageway deep to the flexor retinaculum between the tubercles of the scaphoid and trapezium, laterally, and the pisiform and hook of hamate, medially

Question 46

What does the median nerve supply?

Answer 46

two and a half thenar muscles and the 1st and 2nd lumbricals

Question 47

TRUE or FALSE? | The palmar cutaneous branch of the median nerve passes through the carpal tunnel.

Answer 47

False

Question 48

Where does the ulnar nerve enter the hand?

Answer 48

deep to the tendon of FCU, through the ulnar canal, and along the lateral border of the pisiform

Question 49

What is referred to as the nerve of fine movements?

Answer 49

ulnar nerve

Question 50

The deep branch of the ulnar nerve innervates what joints?

Answer 50

wrist, intercarpal, carpometacarpal, and intermetacarpal

Question 51

TRUE or FALSE? | The radial nerve supplies no hand muscles.

Answer 51

True