<unk>  is the movement which decreases the angle between the foot and the leg. The movement moving in opposite directions is called Plantarflexion.
The range of motion for<unk>  is indicated in the literature as 20° to 30°.
Dorsiflexion
Flexion
Stretching
Maximum intercuspation
Lamaze
Straight leg raise
Quenching 
Range of motion