What is radial deviation in the context of joint action?

Radial deviation refers specifically to the movement of the wrist when the hand moves towards the thumb side of the forearm. This movement involves the lateral (or radial) side of the wrist and is performed primarily by the contraction of the wrist abductors, namely the flexor carpi radialis and the extensor carpi radialis longus and brevis.

In the context of joint actions, radial deviation is distinct, focusing exclusively on how the wrist allows the hand to move towards the thumb. This contrasts with other movements, such as moving the hand away from the body, which may be described as abduction. The other choices do not accurately reflect the mechanics or direction of radial deviation, emphasizing the importance of understanding specific anatomical terminology in relation to joint action.