Spastic paraplegia four (SPG4; also known as SPAST-HSP) is characterised by insidiously progressive bilateral decreased-limb gait spasticity. A lot more than 50% of influenced people have some weak point in the legs and impaired vibration perception in the ankles.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A chromosomal abnormality consisting fr