Spastic paraplegia 4 (SPG4; often known as SPAST-HSP) is characterized by insidiously progressive bilateral decrease-limb gait spasticity. Over fifty% of afflicted folks have some weak spot inside the legs and impaired vibration perception at the ankles.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A variant of ependymoma, frequently located in th