Rigidity and Multifocal Seizure Syndrome, Lethal Neonatal, also known as neonatal-onset encephalopathy with rigidity and seizures, is related to microcephaly and visual epilepsy, and has symptoms including apnea, clonus and myoclonic seizures. An important gene associated with Rigidity and Multifocal Seizure Syndrome, Lethal Neonatal is BRAT1 (BRCA1 Associated ATM Activator 1). Affiliated tissues include tongue and cortex, and related phenotypes are optic atrophy and micrognathia