Spastic paraplegia 4 (SPG4; also called SPAST-HSP) is characterized by insidiously progressive bilateral reduce-limb gait spasticity. Much more than 50% of afflicted people have some weak spot in the legs and impaired vibration feeling within the ankles.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.Hypokalemic periodic paralysis (hypo