Spastic paraplegia four (SPG4; often called SPAST-HSP) is characterized by insidiously progressive bilateral decrease-limb gait spasticity. Much more than fifty% of afflicted individuals have some weak spot in the legs and impaired vibration sense at the ankles.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.Hypokalemic periodic paralys