Elbow A&P

Question 1

the radial head resists _____ stress at the elbow

Answer 1

valgus

Question 2

the lateral side of the humero-radial joint consists of _____radial head and ____ capitulum

Answer 2

concave
convex

Question 3

optimal motion at proximal radio-ulnar joint

Answer 3

70 deg pronation
80 deg supination

Question 4

what is FUNCTION ROM at elbow

Answer 4

30-130 deg flexion
50 deg pron and sup

Question 5

why is the elbow joint especially prone to overuse injuries?

Answer 5

increased stability leads to decreased ability for compensatory strategies

Question 6

humero-ulnar joint has ____ DOF

Answer 6

1

Question 7

open pack position of humero-ulnar joint

Answer 7

70 deg flex
10 deg sup

Question 8

normal carrying angle

Answer 8

F: 13-16 deg
M: 11-14 deg

Question 9

how is the ulna vs humerus positioned for carrying angle?

Answer 9

ulnar moves laterally during extension creating valgus angulation

Question 10

humero-radial joint has ____ DOF

Answer 10

2

Question 11

closed pack of humero-radial joint

Answer 11

90 deg flex
5 deg sup

Question 12

open pack of humero-radial joint

Answer 12

full ext
full sup

Question 13

_____ form 80% of articular surface of proximal radio-ulnar joint

Answer 13

annular ligament

Question 14

what is a characteristic sign of proximal radio-ulnar joint dysfunction?

Answer 14

pain at end range

Question 15

open pack of prox radio-ulnar joint

Answer 15

70 deg flex
35 deg sup

Question 16

closed pack of prox radio-ulnar joint

Answer 16

5 deg sup

Question 17

where is the greatest extensibility of elbow joint capsule?

Answer 17

70-90 deg flex

Question 18

elbow joint capsule is thin but strong; reinforced by ligaments ___ & ____

Answer 18

med and lat

Question 19

T/F: the elbow joint capsule responds well to injury

Answer 19

F!!!

Question 20

UCL is primary restraint to ___ stress at elbow b/w ___ deg

Answer 20

20-130 deg

Question 21

what is the strongest and thickest elbow lig?

Answer 21

ANTERIOR component of UCL

Question 22

the posterior component of UCL is taut at ____ deg flex

Answer 22

60-90 deg

Question 23

what provides most varus stability in elbow?

Answer 23

bone

Question 24

LCL is primary restraint to ___ stress

Answer 24

postero-lateral instability

Question 25

LCL is taught in _____

Answer 25

full sup

Question 26

which lig is injured with nurse maid's injury?

Answer 26

annular

Question 27

main WB joint of elbow vs wrist

Answer 27

elbow - humero-ulnar (IO memb) wrist - radio-carpal

Question 28

cubital tunnel syndromes is issue with ___ nerve

Answer 28

ulnar

Question 29

what decreases canal volume for cubital tunnel?

Answer 29

full elbow flexion space occupying lesions OA RA heterotrophic bone formation trauma to nerve

Question 30

contents of cubital fossa

Answer 30

distal biceps tendon median nerve brachial artery radial nerve medial cubital cutaneous vein

Question 31

nerve supply of musculocutaneous n muscles?

Answer 31

C5-7 biceps, brachialis

Question 32

nerve supply of median n muscles?

Answer 32

C5-T1 PT, FCR, FCU, FDS

Question 33

what is the longest branch of median n?

Answer 33

anterior interosseous n (carpal tunnel)

Question 34

what is the deepest branch of radial n?

Answer 34

posterior interosseous n

Question 35

nerve supply of radial n muscles?

Answer 35

C5-T1 triceps, anconeus, ECRL

Question 36

nerve supply of ulnar n muscles?

Answer 36

C8-T1 FCU, FDP

Question 37

anterior interosseous n levels? muscles?

Answer 37

C8-T1 FDP (2nd & 3rd dig), FPL, PQ

Question 38

posterior interosseous n muscles supplied?

Answer 38

supinator, ECRB, ECU, ED, EI, EDM, EPB, APL

Question 39

what is the central link of the UE kinetic chain?

Answer 39

elbow joint

Question 40

flex/ext and pron/sup are _____

Answer 40

INTERDEPENDENT