The Proximal Radio-Ulnar Joint Permits Medial or Lateral Rotation of the ________

Question

The proximal radio-ulnar joint permits medial or lateral rotation of the ________.
A) ulnar notch
B) radial head
C) radial tuberosity
D) ulnar head
E) humerus

Accepted Answer

The proximal radio-ulnar joint allows for the radial head to rotate medially or laterally around the stationary ulnar head, which is fixed to the wrist bones.