Question

which of the following occurs during pronation at the distal radioulnar joint?
a) the convex radius rolls anterior and glides posterior
b) the concave radius rolls and glides anterior
c) the concave radius rolls and glides posterior
d) the convex radius rolls posterior and glides anterior

Explanation:

During pronation at the distal radioulnar joint, the convex radius rolls anterior and glides posterior. This is based on the biomechanical principles of joint movement where the direction of roll and glide is determined by the shape of the articulating surfaces (convex - radius in this case) and the type of movement (pronation).

Answer:

A. The convex radius rolls anterior and glides posterior