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MSK basics > elbow 1 - anatomy > Flashcards

elbow 1 - anatomy Flashcards

1
Q

the trochlea articulates with what

A

the ulna

  • in the trochlear notch
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2
Q

the capitulm articulates with what

A

the head of the radius

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3
Q

which side of the trochlear is longer

A

the medial side this is what produces the carrying angle

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4
Q

is men or women’s carrying angle larger

A

women’s: 13-16

mens: 10- 14

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5
Q

what ligament surronds the radial head

A

the annular ligament

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6
Q

where does the biceps tendon attach in the lower arm

A

the radial tuberosity

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7
Q

where do the triceps attach

A

the olecranon

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8
Q

what are the name of the two lateral ligamants of the elb.

A

the medial collateral lig (ulna)

the lateral collateral lig

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9
Q

what is the function of the collateral lig of the elb.

A

keep the articular surface in contact and prevent side to side movement

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10
Q

where does the radial collateral lig run from

A

the lateral epicondyle

blends distally with the annular ligament

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11
Q

what two lig make up the ulnar collateral lig

A

lateral ulnar collateral lig

medial ulnar collateral lig

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12
Q

lateral ulnar collateral lig - where does it run

A

the lateral epicondyle
to
the ulna

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13
Q

the relationship between the lateral ulnar collateral lig and the radial collateral lig

A

orginate from a common origin

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14
Q

what are the properties of the Ulnar collateral lig

A

it is triangular shaped

medial

3 bands - ant, post, oblique

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15
Q

where does the ulnar collateral ligament run from

A

the medial epi

to

cornoid process and olecranon

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16
Q

what motion do the ulnar collateral lig resist

A

valgus for

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17
Q

what motion do the radial collateral lig resist

A

varus force

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18
Q

what is the function of the annular lig

A

attaches at the anterior and the posteior margins of the of the radial notch of the ulna

keep the radial head in proximity with the ulna

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19
Q

what is a nursemaid elb

A

when this is a distristractive force of sig magnitude that causes the radial head to dislocate

pulling child up from their elb.

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20
Q

what kind of joint is the humeral radial joint

A

saddle - hinge

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21
Q

what movement is allowed at the humeral-radial joint

A

flex and ext

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22
Q

what is the capsular pattern of the HR joint

A

Flex > ext

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23
Q

what is the resting position of HRJ

A

70-deg of flexion

10-sup

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24
Q

what is the CPP of the HRJ

A

full extension with supination

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25
Q

proximal radial-ulnar joint - motion

A

pronation and supination

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26
Q

proximal radial-ulnar joint - capsular pattern

A

equal pronation and supination

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27
Q

proximal radial-ulnar joint - resting position

A

70 flex

35 supination

28
Q

proximal radial-ulnar joint - max position of the interossei

A

full ext

5-deg of supination

29
Q

proximal radial-ulnar joint - what makes up this joint

A

circular radial head

the radial notch of the ulna

30
Q

what is another ligament of the proximal radial-ulnar joint that resit pronation and supination

A

the quadrate ligament

fibers are taut with pronation and supination

31
Q

at the proximal radial-ulnar joint what is moving on what to allow for pronation and supination

A

the rounded radial head is moving the the radial notch of the ulna

32
Q

what resists pronation

A

the approximation of the radius and the ulna

firm end feel

33
Q

what resist supination

A

the interosseius membrane

soft end feel

34
Q

where does the olecranon bursa sit

A

lies posteriorly between the skin and the olecranon

35
Q

what muscles flex the elb.

A

biceps (muscolcutaneus n.)

brachialis (MSC n.)

brachioradialis (radial nerve)

36
Q

what muscle extend the elb.

A

triceps

anconeus

(both radial nerve)

37
Q

what muscles are found in the superficial dorsal compartment

A

brachioradialis
ECRL

ECRB
EDM
ED
ECU

38
Q

what nerve supplies the superficial dorsal compartment

A

the radial nerve

39
Q

what muscle are found in the deep layer of the dorsal compartment

A

abd pollicus longus

extensor pollicus longus and brevis

EI

supinator

40
Q

the deep layer of the dorsal compartent is supplies by what nerve

A

the Posterior interosseous nerve

41
Q

what is the the Posterior interosseous nerve a continuation of

A

the radial nerve once it passes through the supinator

42
Q

what are the flexors of the wrist

A

FCR
FCU
plamaris longus

43
Q

the pronator teres is a site of entrapment for what nerve

A

the median nerve

44
Q

what nerve supplies the pronator quadratus

A

AIN - branch of the median nerve

45
Q

what does the brachial art branch into

A

the radial and ulnar art

46
Q

what does allens test test

A

the blood flow to the hand

looking for occulsions to the art

47
Q

what are the roots of the ulnar nerve

A

C8 - T1

48
Q

what is the pathway of the ulnar nerve

A

arcade of struther

cubital tunnel

two head of the FCU

travesl between the FCU and FDP

guyons canal

hook of hammate

49
Q

what makes up the cubital tunnel

A

the medial epicondyle

olecranon

50
Q

what flexes the fingers

A

FDP

FDS

51
Q

what goes through the cubital fossa

A

median

52
Q

what is the pathway of median nerve

A

goes through the two heads of the pronator teres

travels between FDS and FDP

53
Q

when does the median nerve becomes the AIN

A

passes underneath the the FDS and travels next to the interossei

54
Q

what muscle does the median nerve serve

A

flexor region
- pronator teres
- FCR
- plamaris longus
- FCU

LOAF muscle
- lumbrical (1-2)
- oppenens pollicus brevis
- abd pollicus brevis
- flexor pollicus brevis

55
Q

what muscles do the AIN serve

A

FDP

FPL

pronator quadratus

56
Q

what muscles does ulnar nerve serve

A

intrinsic muscle of the hand
- entire hypothenar eminence
- adductor pollicis
- interossei all
- lumbrical (3-4)

FCU

superficial branch - palmaris brevis

57
Q

what does the radial nerve serve

A
  • Brachioradialis (elb. Flex)
  • Triceps (elb. Ext)
  • Aconeus (elb ext)
  • Dorsal comportment of the forearm
    o Brachioradialis
    o ECRL
    o ECRB
    o ED
    o EDM
    o ECU
58
Q

PIN: (continuation of the radial nerve as it passes through the supinator)

A

o Supinator
o Extensor indicis
o Abd pollicis longus
o Ext pollicis longus
o Ext pollicis brevis

o ED
o EDM
o ECU

59
Q

what root is the median nerve

A

C6 - T1

60
Q

what root is the radial nerve

A

C5- C8 and T1

61
Q

what is the pathway of the radial nerve

A

runs Posteriorly, inferiorly, laterally between the heads of the triceps

seperates between - superficial and deep branch

arcade of froshe - radial nerve

62
Q

what makes up the arcade of froshe

A

formed by the fibrous band between the heads of the supinator

63
Q

what patho thing is going on that leads to PIN syndrome

A

compression of the nerve at the - Edge of the ECRB, arcade of Frohse, or as the PIN passes through the supinator

64
Q

what is the overal presentation of PIN syndrome

A

weakness and not a lot of pain (still some)
- pure motor, not sensory

weakness: finger, wrist, thumb

65
Q

what is radial tunnel syndrome entrapment location

A

arcade of frohse or as the pin passes through the supinator

66
Q

what makes up the arcade of froshe

A

edial head of the triceps brachii muscle and its aponeurotic expansion

67
Q

radial tunnel and PIN syndrome

A

PIN - weakness some pain

radial tunnel - pain, no really weakness

MSK basics (20 decks)

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