Spastic Paraplegia 50, Autosomal Recessive, also known as hereditary spastic paraplegia 50, is related to severe intellectual disability and progressive spastic paraplegia and spastic paraplegia 47, autosomal recessive, and has symptoms including seizures and pseudobulbar signs. An important gene associated with Spastic Paraplegia 50, Autosomal Recessive is AP4M1 (Adaptor Related Protein Complex 4 Subunit Mu 1), and among its related pathways/superpathways are Vesicle-mediated transport and trans-Golgi Network Vesicle Budding. Affiliated tissues include brain, and related phenotypes are hyperreflexia and hypotonia