Spastic paraplegia four (SPG4; also known as SPAST-HSP) is characterized by insidiously progressive bilateral reduced-limb gait spasticity. Over fifty% of influenced folks have some weakness within the legs and impaired vibration feeling at the ankles.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.Hypokalemic periodic paralysis (hypoPP