superior radioulnar joint

Question 1

classification

Answer 1

synovial pivot joint

Question 2

axes of movement

Answer 2

1-vertical

Question 3

articular surfaces

Answer 3

head of radius
radial notch on ulna
annular ligament

Question 4

2 features of head of radius

Answer 4

oval shaped, lined with hyaline cartilage

Question 5

two features of radial notch on ulna

Answer 5

creates 1/5 of ring
lined with hyaline cartilage

Question 6

two features of annular ligament

Answer 6

creates 4/5 of ring
lined with fibrocartilage

Question 7

two features of capsule

Answer 7

extensive, shared with elbow
synovial membrane - hangs as fold below annular ligament

Question 8

features of annular ligament

Answer 8

creates 4/5 of ring
strong and flexible allowing oval head to rotate freely
attached to anterior and posterior margins of radial notch
superior support provided by radial collateral ligament
upper part lined with fibrocartilage, lower part lined with synovial membrane

Question 9

function of annular ligament

Answer 9

prevents displacement of radial head and stabilises joint

Question 10

origin and insertion of quadrate ligament

Answer 10

lower border of radial notch of ulna -> medial surface neck of radius

Question 11

function of quadrate ligament

Answer 11

fibres run in a criss cross orientation so under tension in all positions.
limits pronation and supination