Spastic paraplegia 4 (SPG4; also called SPAST-HSP) is characterized by insidiously progressive bilateral reduce-limb gait spasticity. Much more than fifty% of affected men and women have some weak spot inside the legs and impaired vibration perception for the ankles.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ??