Lec. 2: Kin of the Elbow

Question 1

ulnohumeral jt:
CPP, Cap. pattern, and typical dislocation

Answer 1

CPP: EXT w/ supination Cap. pattern: restriction of FLEX > EXT
Typical dislocation: humerus move ANT and INF

Question 2

arthrokinematics of ulnohumeral jt

Answer 2

concave trochlear notch moves around convex trochlea so roll and glide occur in same direction

Question 3

radiohumeral jt:
CPP, Cap. pattern, and typical dislocation

Answer 3

CPP: elbow flexed 90 degrees w/ 5 degrees SUP’N
Cap. pattern: FLEX > EXT
Typical dislocation: humerus moves ANT and INF

Question 4

arthrokinematics of the radiohumeral jt

Answer 4

concave radial head moves around convex capitulum therefore roll and glide occur in the same direction

Question 5

injury to the radiohumeral jt is common in ______ sports due to rapid elbow EXT and decreased congruency of the jt

Answer 5

throwing

Question 6

~ ___-___ degrees of FLEX and ~ ___-___ degrees of EXT for both ulno- and radiohumeral jts

Answer 6

140-150,
0-10

Question 7

carrying angle of elbow for men and women is roughly what

Answer 7

5 degrees for men
10-15 degrees women

Question 8

PROX radioulnar jt:
CPP, Cap. pattern, and typical dislocation

Answer 8

CPP: 5 degrees SUP’N
Cap. pattern: SUP’N = PRO’N
Typical dislocation: radial head moves INF out of annular lig

Question 9

DIST radioulnar jt:
CPP, Cap. pattern, and typical dislocation

Answer 9

CPP: 5 degrees SUP’N
Cap. pattern: P at extremes of ROT
Typical dislocation: radiocarpal dislocation vs. radioulnar

Question 10

7 prime movers of the elbow (including SUP’N)

Answer 10

biceps brachii
brachialis
brachioradialis
triceps brachii
pronator teres
pronator quadratus
supinator

Question 11

what is the primary flexor of the elbow

Answer 11

brachialis

Question 12

shunt mm that stabilizes the elbow

Answer 12

BR

Question 13

6 synergists of the elbow (including SUP’N)

Answer 13

triceps
biceps
anconeus
pronator teres
FCU and FCR