Spastic paraplegia 4 (SPG4; often called SPAST-HSP) is characterised by insidiously progressive bilateral lower-limb gait spasticity. Greater than fifty% of impacted people today have some weakness during the legs and impaired vibration perception on the ankles.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ????