Spastic paraplegia 4 (SPG4; often called SPAST-HSP) is characterized by insidiously progressive bilateral reduced-limb gait spasticity. Greater than fifty% of affected folks have some weak spot within the legs and impaired vibration feeling at the ankles.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.??? ?? ??: ???? ??? ??? ? ?? ?? ??? ?? ???? ????