LEC44: Upper Extremity I Flashcards Preview

Structures: Part Deux > LEC44: Upper Extremity I > Flashcards

Flashcards in LEC44: Upper Extremity I Deck (57):
1

4 things to know about a joint

1) bones involved
2) blood supply to muscles of joint = blood supply to joint
3) innervation of muscles that move joint
4) those m. innervations = joint sensory innervation

2

synovial fluid function

reduces friction

3

what keeps synovial fluid in place

capsule

4

what makes synovial fluid

membranes around joint, in synovial joint capsule

5

what is surface of synovial joint

hylaine cartilage - v. smooth, allows surfaces to glide over each other

6

parts of synchondrotic bone

epiphysis, cartilage growth plate, diaphysis

7

growth plate made of?

cartilage

8

epiphysis

cap on either side of long bone

9

diaphysis

center part of long bone

10

what does ligament connect? function?

bone-bone
stabilization

11

what does tendon connect? function?

muscle-bone
action of 1 bone relative to another

12

"arm"

"brachia"

13

where is arm?

shoulder to elbow

14

where is forearm?

elbow to wrist

15

where is axilla?

armpit

16

movements of shoulder joint

1) extension
2) hyperextension
3) flexion
4) circumduction

17

movements of elbow joint

1) supination
2) pronation
3) flexion
4) extension

18

where is olecranon? olecranon process? what does it allow us to do?

olecranon- proximal bone projection from ulna; "tip of the elbow"
nests in olecranon fassa of humerus
this allows us to have totally full extension of arm > full brachiation, throwing motion

19

movements of wrist

1) extend
2) flex
3) abduct
4) adduct

20

what movement can't the wrist do?

hyperextend

21

ventral wrist compartment responsible for what movement?

flexion

22

dorsal wrist compartment responsible for what movement?

extension

23

wrist tendons?

1) flexor carpe radialis
2) flexor carpe ulnaris
3) extensor carpe ulnaris
4) extensor carpe radialis longus and extensor carpe radialis brevis

24

contraction of radialis muscle is what movement?

adduction

25

contraction of ulnaris muscle is what movement?

abduction

26

what is adduction?

toward axis of symmetry
bring things together

27

what is abduction?

away from axis of symmetry
separate things

28

what movements can/can't middle finger make?

can abduct medially or laterally; cannot adduct

29

what is supination?

hands are up
(holding bowl of soup)

30

what is pronation?

hand is down
(you're a pro, high five hand down)

31

muscles involved in abduction of arm?

1) supraspinatus m.
2) deltoid m.
3) serratus anterior m.

32

rotator cuff muscles?

1) supraspinatus m. (not a rotator!)
2) infraspinatus m.
3) teres minor m.
4) subscapularis m.

33

what does patella allow?

deep knee bend

34

characteristic of pectoral girdle re: upper limbs

very flexible, gives upper extremity lots of flexibility for movement, but not v. stable

35

what is it easy to dislocate a shoulder?

glenoid fassa is very shallow; not a solid cup

36

if arm muscle is in extensor compartment, what is its innervation?

radial nerve

37

if arm muscle is in flexor compartment, what is its innervation?

musculocutaneous n. between shoulder-elbow

38

"forearm"

antebrachium

39

"hand"

manus

40

finger movements?

1) flexion
2) extension
3) abduction
4) adduction

41

when someone's in the anatomical position, how are their joints?

extended

42

foot toes toward the floor is what movement?

plantarflexion, flexion
(standing on tiptoes)

43

foot toes pulled back toward shin is what movement?

dorsiflexion, hyperextension
(walking on your heels)

44

which joints have pulleys?

1) humerus-lower leg, via patella
2) ankle-bottom of foot

45

what nerves innervate elbow-wrist?

mostly median n., some ulnar n.

46

what nerves innervate hand?

mostly ulnar n., some median

47

in anatomical position, where is radius?

thumb side

48

retinacula tendons of wrist function

hold down muscles of forearm so when contract fingers, see muscular bulge in forearm

49

where are lumbricals, what do they flex and extend?

4 muscles, each asoc. with 1 finger
flex metacarpophalangeal joints
extend interphalangeal joints

50

what muscle does "bye bye" action?

lumbricals

51

common vasculature of elbow

medial: basilic
lateral: cephalic

52

where do elbow vessels run between?

deltoid and pectoral muscles

53

what is the "H-shaped" vein across elbow? its use?

median cubidal vein
draw blood there

54

what are "M-shaped" veins across elbow?

median cephalic v., median basilic v., median vein of forearm

55

which arteries involved in finger adduction?

palmars

56

which arteries involved in finger abduction?

dorsals

57

why is chin up easier than pull up?

if arms are already supinated, as in chin up, biceps don't have to work to supinate, just elbow flexion must work