Intellectual Developmental Disorder, Autosomal Recessive 46, is also known as mental retardation, autosomal recessive 46, and has symptoms including sleep disturbances and agitation. An important gene associated with Intellectual Developmental Disorder, Autosomal Recessive 46 is NDST1 (N-Deacetylase And N-Sulfotransferase 1). Affiliated tissues include brain, and related phenotypes are intellectual disability and global developmental delay