Spastic Paraplegia 81, Autosomal Recessive, also known as spg81, is related to hereditary spastic paraplegia 18 and spastic paraplegia 62, autosomal recessive. An important gene associated with Spastic Paraplegia 81, Autosomal Recessive is SELENOI (Selenoprotein I), and among its related pathways/superpathways are Metabolism and Glycerophospholipid biosynthesis. Affiliated tissues include brain and eye, and related phenotypes are microcephaly and progressive spasticity