Spastic paraplegia 4 (SPG4; often called SPAST-HSP) is characterized by insidiously progressive bilateral reduced-limb gait spasticity. In excess of fifty% of afflicted people today have some weak spot during the legs and impaired vibration feeling with the ankles.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ??