Spastic Paraplegia 51, Autosomal Recessive, also known as cerebral palsy, spastic quadriplegic, 4, formerly, is related to hereditary spastic paraplegia 51 and spastic quadriplegic cerebral palsy, and has symptoms including seizures An important gene associated with Spastic Paraplegia 51, Autosomal Recessive is AP4E1 (Adaptor Related Protein Complex 4 Subunit Epsilon 1). Affiliated tissues include brain and t cells, and related phenotypes are hyperreflexia and hypotonia