TY - CHAP M1 - Book, Section TI - Generalized Atonic Seizures A1 - Drees, Cornelia A1 - Chapman, Kevin A2 - Sirven, Joseph I. A2 - Stern, John M. PY - 2011 T2 - Atlas of Video-EEG Monitoring AB - The most recent classification of seizure types by the International League Against Epilepsy (ILAE) defines atonic seizure as “sudden loss or diminution of muscle tone without apparent preceding myoclonic or tonic event lasting one to two seconds or more, involving head, trunk, jaw or limb musculature.”1 As it affects mostly the axial muscles, it can lead to a fall or, if not affecting the whole trunk, to a head “nod” or “drop.” The term astatic seizure encompasses a variety of seizure types leading to “loss of erect posture that results from an atonic, myoclonic or tonic mechanism.”1 Thus, atonic seizure implies abnormal muscle tone, whereas astatic seizure refers simply to a fall and does not require any knowledge about tonicity. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - neurology.mhmedical.com/content.aspx?aid=1103049473 ER -