Palm of Hand

Question 1

proximal carpals of wrist

Answer 1

scaphoid
lunate
triquetrum
pisiform

Question 2

distal carpals of wrist

Answer 2

trapezium
trapezoid
capitate
hamate

Question 3

bones of hand

Answer 3

metacarpals
phalanges (proximal, middle, distal) (thumb only has 2 rest have 3)

Question 4

metacarpophalangeal joints (MCP) actions

Answer 4

• condyloid joint
  flexion
  extension
  abduction
  adduction

Question 5

Interphalangeal joints actions

Answer 5

flexion
extension
(hinge joint)

Question 6

extrinsic muscles of hand are located… and perform what functions?

Answer 6

located in the anterior and posterior compartments of the forearm
- control crude movements and produce a forceful grip - bigger movements

Question 7

what type of movements do intrinsic muscles of the hand perform, and where are they found

Answer 7

located within the hand
- responsible for fine motor movements

Question 8

instrinsic muscles of hand compartments

Answer 8

thenar compartment
adductor compartment
hypothenar comp.
lumbricals (central compartment)
interossei

Question 9

thenar compartment muscles

Answer 9

abductor pollicis brevis, flecor pollicis brevis, opponens pollicis

Question 10

adductor compartment muscles

Answer 10

adductor pollicis

Question 11

hypothenar compartment muscles

Answer 11

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

Question 12

lunbricals (central comp.) muscles

Answer 12

1-4 and associated with long flexor tendons

Question 13

interossei compartment

Answer 13

located between metacarpals
dorsal and palmar

Question 14

what are the major compartments

Answer 14

thenar and hypothenar

Question 15

movements of the fingers

Answer 15

abduction/adduction occurs at MCP
flexion/extension occurs at MCP and IP joints

Question 16

movements of the thumb

Answer 16

abduction
adduction
extension
flexion
opposition
repositon

Question 17

what is palmar aponeurosis and what does it do

Answer 17

thickened fascia
provides a barrier between skin and underlying neurovasculatur structures

Question 18

what does palmaris brevis do

Answer 18

cups the hand

Question 19

superficial layer of muscles of palm

Answer 19

thenar compartment (abductor pollicis brevis and flexor pollicis brevis)
hypothenar comp. (abdcutor digiti minimi and flexor digiti minimi)

Question 20

2nd layer of muscles of palm

Answer 20

lumbricals 1 and 2 (innervated by median nerve
lumbircals 3 and 4 (innervated by ulnar nerve

Question 21

proximal attachment of 2nd layer of palm muscles

Answer 21

tendons of the flexor digitorum profundus

Question 22

distal attachment of 2nd layer of palm

Answer 22

extensor expansions of digits 2-5

Question 23

lumbricals can

Answer 23

simultaneouslt flex at MCP joints and extend at PIP and DIP joints

Question 24

extensor expansion includes

Answer 24

tendonds of the long extensor muscles of the posterior forearm (extensor, digitorum, extensor indicis, extensor digiti minimi)

Question 25

3rd layer of muscles of palm

Answer 25

adductor pollicis opponens digiti minimi (hypothenar opponens pollicis (thenar)

Question 26

4th layer (deepest) of muscles of palm

Answer 26

interossei muscles: 3 palmar interossesous muscles (abduct = PAD) 4 dorsal interossesous muscles (abduct = DAB)

Question 27

arteries of the palm of hand

Answer 27

ulnar and radial arteries supplie the palm branches from both vessels anastomose to make superficial palmar and deep palmar arches

Question 28

nerves in palm

Answer 28

median nerve ulnar nerve

Question 29

median nerve in the palm

Answer 29

enters the hand through the carpal tunnel - recurrent branch of median nerve (motor) - palmar branches of median nerve - sensory to lateral 3.5 digits

Question 30

ulnar nerve in the palm

Answer 30

superficial branch (sensory deep branch (motor) - hypothenar muscles, medial 2 lumbricals, adductor pollicis, all the interossei