Extension of the metacarpophalangeal (MCP)joint of the second digit results in a ________________roll and a ________________glide of the proximal phalanx on the metacarpal.
A) dorsal,dorsal
B) volar,volar
C) dorsal,volar
D) volar,dorsal

Question

Quizplus · Accepted Answer

During extension of the MCP joint, the proximal phalanx rolls and glides dorsally on the metacarpal due to the concave-convex rule, where the concave surface of the phalanx moves on the convex surface of the metacarpal.

Extension of the Metacarpophalangeal (MCP)joint of the Second Digit Results