(AP^W R-bending and W L-bending) and (lateral^W flexion and W extension)
(ap^w r-bending and w l-bending) and (lateral^w flexion and w extension)
(AP^W R-bending and W L-bending) and (lateral^W flexion and W extension)
(ap^w r-bending and w l-bending) and (lateral^w flexion and w extension)