Intellectual Developmental Disorder, Autosomal Dominant 5, also known as mrd5, is related to syngap1-related intellectual disability and stereotypic movement disorder, and has symptoms including seizures An important gene associated with Intellectual Developmental Disorder, Autosomal Dominant 5 is SYNGAP1 (Synaptic Ras GTPase Activating Protein 1). Affiliated tissues include brain and cortex, and related phenotypes are hypotonia and global developmental delay