The bending of a joint in the SAGITTAL plane. Usually an anterior movement, it is occasionally posterior, as in the case of the knee-joint. Lateral ?exion refers to the bending of the spine in the coronal plane – that is, from side to side.
n. the bending of a joint so that the bones forming it are brought towards each other. Plantar flexion is the bending of the toes (or fingers) downwards, towards the sole (or palm). See also dorsiflexion.