ANATOMY - Palm

Question 1

what are the muscles in the thenar eminence of the palm?

Answer 1

abductor pollicis brevis

flexor pollicis brevis

opponens pollicis

Question 2

what is the lateral-most muscle of the thenar eminence of the palm?

Answer 2

abductor pollicis brevis

Question 3

what are the three muscles of the thenar eminence innervated by?

Answer 3

recurrent branch of the median n.

Question 4

what is the function of abductor pollicis brevis?

Answer 4

abducts thumb, assists in some rotation of proximal phalanx slightly medially

Question 5

Flexor pollicis brevis

function?

Answer 5

Flexes thumb at CMC and MCP but NOT IP (that is only flexor pollicis longus)

(does not cross IP joint)

Question 6

function flexor pollicis longus

Answer 6

flexes thumb at CMC, MCP AND IP joints

crosses the IP joint

Question 7

opponens pollicis

function

Answer 7

abducts, medially rotates, and flexes metacarpal of thumb (opposition of thumb)

Question 8

what are the muscles of the hypothenar eminence of the palm?

Answer 8

abductor digiti minimi

flexor digiti minimi brevis

opponens digiti minimi

Question 9

what nerve innervates the hypothenar eminence of the palm?

Answer 9

deep branch of the ulnar n.

Question 10

function of abductor digiti minimi

Answer 10

abducts little finger

Question 11

function of flexor digiti minimi brevis

what joints does it cross? what other muscles flex the fingers?

Answer 11

flexes little finger at MCP

only crosses MCP joint, not PIP or DIP

flexor digitorum superficiales (MCP/DIP)
flexor digitorum profundas (MCP/DIP/PIP)

Question 12

opponens digiti minimi

function

Answer 12

draws 5th metacarpal forward and rotates it laterally (opposition)

Question 13

what are the muscles of the adductor compartment?

Answer 13

adductor pollicis

Question 14

what is the adductor pollicis innervated by?

Answer 14

deep branch of ulnar n.

Question 15

what 4 intrinsic muscles of the hand act on the thumb?

Answer 15

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis
adductor pollicis

Question 16

what are the muscles of the midpalmar compartment?

Answer 16

lumbricles
palmar interossei
dorsal interossei

Question 17

what do the lumbricles connect to?

why do they do?

Answer 17

the sides of the FDP tendons and to the extensor hood

flex the MCPs and extension at the IPs

Question 18

innervation of the lumbricles?

Answer 18

deep ulnar n. (medial 2)

median n. (lateral 2)

Question 19

palmar interossei

attachments, function

Answer 19

o: edges of metacarpals
i: proximal phalanges and extensor hood

ADDUCTS 2, 4, 5 fingers
lumbricle salute

Question 20

dorsal interossei

function

Answer 20

ABDUCT 2, 3, 4
lumbricle salute

DAB

Question 21

innervation of dorsal interossei muscles?

Answer 21

deep ulnar n.

Question 22

innervation of palmar interossei muscles

Answer 22

deep ulnar n.

Question 23

what two arteries make up the superficial palmar arch?

where is this located

Answer 23

superficial branch of the radial a.
ulnar a.

between the deep flexor tendons and palmar aponeurosis

Question 24

what two arteries make up the deep palmar arch?

Answer 24

deep branch of the ulnar a.

radial a.

Question 25

Prior to entering tunnel median n. gives off its ________ br.
which supplies _________________________

Answer 25

palmar branch

cutaneous sensation to the skin of the middle palm

Question 26

the ulnar n. passes over the carpal tunnel and under ______________

and branches into:

Answer 26

Guyon’s canal

deep branch ulnar n. and common/proper digital

Question 27

what skin does the ulnar n. innervate?

Answer 27

1 and 1/2 fingers (medial) on palm AND dorsum

Question 28

what muscles of the palm does the deep ulnar n. innervate?

Answer 28

the thenar eminence, the adductor eminence, and 1/2 of the lubricles, the interosseous muscles

Question 29

what cutaneous innervation comes off from the median n. ?

Answer 29

3 and 1/2 fingers medial AND PALMAR side (not dorsal)