Hereditary Spastic Paraplegia 51, also known as spastic paraplegia 51, autosomal recessive, is related to spastic paraplegia 51, autosomal recessive and spastic quadriplegic cerebral palsy, and has symptoms including seizures An important gene associated with Hereditary Spastic Paraplegia 51 is AP4E1 (Adaptor Related Protein Complex 4 Subunit Epsilon 1). Affiliated tissues include brain, and related phenotype is nervous system.