Ted Lewis, also currently credited as Ed Paul, is one of NY's most well-known voice actors.
circular movement around an axis: dorsiflexion: decreasing the angle of the ankle joint so that the foot bends backwards (upward) plantar flexion: the motion that extends the foot downward toward the ground as when pointing the toes: plant/o: sole of the foot: supinaton: as applied to the hand, the act of turning the palm forward, or up: pronation
Unfortunately, if one of these ligaments remains in the hooked position, the horse is unable to bend its hind legs. This condition is known as Upward fixation of the patella and can range from a slight delay in a leg's forward motion to completely locking that freezes a leg for long periods of time.