Spastic paraplegia four (SPG4; often known as SPAST-HSP) is characterized by insidiously progressive bilateral lower-limb gait spasticity. A lot more than fifty% of influenced individuals have some weak point in the legs and impaired vibration sense for the ankles.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ??