Generalized myoclonic-atonic seizure 2011-11-19T10:00:46Z Myoclonic-astatic seizure SNOMEDCT_US:230421008 Myoclonic atonic seizures A generalized myoclonic-atonic seizure is a type of generalized motor seizure characterized by a myoclonic jerk followed by an atonic motor component. A myoclonic-tonic seizure was previously called a myoclonic-astatic seizure. ILAE2017 does not currently consider myoclonic-atonic seizures to be a form of myoclonic seizure which is why it is classified as a motor seizure. Generalised myoclonic-atonic seizure UMLS:C0393702 HP:0011170 Generalized-onset motor seizure