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Movements At Wrist Joint According to Axis and Plane

Movements At Wrist Joint According to Axis and Plane

Movements of the wrist occur around  two axes when the hand is in the anatomical position, i.e. in full supination.

A transverse axis AA’,:lying in a coronal plane (C) and controlling the movements of flexion-extension in the sagittal plane (S):

Flexion:the anterior (palmar) surfhce of the hand moves towards the
anterior aspect of the forearm.

Extension:the posterior (dorsal) surface of the hand moves towards the
posterior aspect of the forearm. It is better to avoid the terms dorsiflexion. which contradict the action of the extensor muscles, and even more palmar flexion, which is tautological.

An antero-posterior axis BB:lying in a sagittal plane (S) and controlling movements of adduction-abduction, which take place in the coronal plane and are wrongly . called ulnar deviation or radial deviation, following the lead of anglophone authors:

Adduction or ulnar deviation : the hand moves towards the axis of the
body, and its medial (palmar) border formation obtuse angle with the medial border of
the forearm

Abduction or radial deviation:the hand moves away from the axis of the
body’, and its lateral (radial) border forms an obtuse angle with the lateral border of the forearm.

In actual fact, the natural movements of wrist occur around oblique axes to produce
. combined flexion and adduction
. combined extension and abduction

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