58: Hand

Question 1

Some Lovers Try Positions That They Can’t Handle

Answer 1

scaphoid lunate triquitrium pisiform trapezium trapezoid capitate hamate

Question 2

the thumb has no ___________ phalanx

Answer 2

middle

Question 3

joint between radius and scaphoid and lunate

Answer 3

condylid synovial joint

Question 4

trapeziometacarpal joint

Answer 4

saddle joint which gives thumb mobility

Question 5

function of the thenar compartment of the hand

Answer 5

flexion, abduction, and opposition of the thumb

Question 6

innervation of the thenar compartment of the hand

Answer 6

recurrent branch of the median n.

Question 7

function of the hypothenar compartment of the hand

Answer 7

flexion, opposition and abduction of the 5th digit

Question 8

innervation of the hypothenar compartment of the hand

Answer 8

deep branch of the ulnar n.

Question 9

all extensor muscles of the hand are…

Answer 9

extrinsic! There is no posterior compartment of the hand

Question 10

thenar muscles (3)

Answer 10

abductor pollicus brevis
flexor pollicus brevis*
opponens pollicis

• deep head of this muscle is innervated by the deep branch of the ulnar n.

Question 11

hypothenar muscles (3)

Answer 11

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi

Question 12

action of lumbicals

Answer 12

flex MCP joint, extend IP joint

Question 13

innervation of lumbricals

Answer 13

lateral 2 - median n.

medial 2- deep branch of ulnar n.

Question 14

action of dorsal interossei (4)

Answer 14

abduct DAB

Question 15

action of palmar interossei (3)

Answer 15

adduct PAD

Question 16

innervation of the interossei muscles

Answer 16

deep branch of the ulnar n.

Question 17

innervation of adductor pollicis

Answer 17

deep branch of the ulnar n.

Question 18

is the adductor pollicis a thenar muscle?

Answer 18

NO

Question 19

branches off the ulnar a. in hand

Answer 19

deep palmar branch of ulnar a.

superficial palmar arch. (gives rise to common, proper)

Question 20

branches off the radial a. in the hand

Answer 20

superficial plamar arch of radial a.
deep palmar arch
princeps pollicis a.
radial indicis a.

Question 21

what does the allen’s test look for

Answer 21

ulnar and radial artery anastomoses in hand

Question 22

how do the ulnar and radial a. connect in the hand?

Answer 22

ulnar -> superficial palmar arch –> superficial palmar br of radial a. –> radial a.
OR
radial a –> deep palmar arch –> deep palmar br of ulnar a. –> ulnar a.

Question 23

numbness/paresthesia of medial 1.5 digits and/or weakness of the intrinsic hand muscles

Answer 23

compressioin of ulnar n. in ulnar canal

Question 24

numbness/paresthesia of lateral 3.5 digits and or weakness of the thenar eminence muscles

Answer 24

compression of median n. in carpal tunnel

Question 25

loss of lumbrical leads to clawing of digits…

Answer 25

2 and 3

Question 26

“ape hand” loss of thenar muscle only

Answer 26

damage to recurrent branch of median n.

thumb is adducted and laterally rotated

Question 27

the narrow passage into the hand between the carpals posteriorly and the flexor retinaculum anteriorly

Answer 27

carpal tunnel

Question 28

contents of the carpal tunnel

Answer 28

median n.
tendons of flexor digitorum superficialis
tendon of flexor digitorum profundus
tendon of flexor pollicus longus