Spastic paraplegia four (SPG4; also known as SPAST-HSP) is characterised by insidiously progressive bilateral decreased-limb gait spasticity. Over fifty% of impacted people today have some weakness from the legs and impaired vibration sense with the ankles.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ???? ?????