Superior Radioulnar Joint

Question 1

Type of Joint

Answer 1

Synovial pivot between circumference of head of radius and ring formed of annular ligt and radial notch of ulna

Capsule continuous with that of elbow joint

Question 2

Supporting Ligaments

Answer 2

Annular- flexible fibrocartilaginous band, stabilises joint by preventing displacement of radial head

• between post/ant margins of radial notch
• fuses sup with LCL, ant/post with joint capsule

Quadrate-

• from lower border of radial notch
• to adjacent med surface of radial neck prox to radial tuberosity

Question 3

Movements from mid-prone

Answer 3

Supination 90deg

Pronation 80-90deg (radius crosses over ulna)