The Movements of Bones and Joints

Two successive movements at a joint, if not in one and the same plane, constitute a diadochal movement. 2. Diadochal movements impose conjunct rotation upon the bone which has been moved. This may be countered by a rotation of opposite sense. 3. All muscles of a given joint are, therefore, rotators in some degree. 4. Upon the basis of these principles diagnostic and therapeutic suggestions are made.