Atrophy, confined to small muscles of feet and tibialis anterior muscles; Basic underlying defect(s) in HSP - remaining unknown; Classification by mode of inheritance and genetic loci; Families suffering from HSP - in association with additional neurological features or complicated HSP; Hereditary or familial spastic paraplegia, HSP, FSP group of inherited disorders; Hereditary spastic paraplegia; Onset of stiffness and weakness of hip and leg muscles - and associated gait disturbance tends to be insidious; Pes cavus in patient with HSP
