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