Spastic paraplegia 4 (SPG4; also known as SPAST-HSP) is characterised by insidiously progressive bilateral reduce-limb gait spasticity. More than 50% of afflicted people have some weak point during the legs and impaired vibration sense for the ankles.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A variant of ependymoma, generally present in the sp