TY - CHAP M1 - Book, Section TI - EEGs: When, How, and Why A1 - Blume, Warren T. A2 - Duchowny, Michael A2 - Cross, J. Helen A2 - Arzimanoglou, Alexis PY - 2017 T2 - Pediatric Epilepsy AB - Ictal symptoms and signs reflect area(s) of the brain involved in the seizure. Events early in the seizure have greater localizing value than later ones as these latter may result from propagation. As certain symptoms, such as a rising abdominal sensation in a focal seizure, may result from involvement of any one of two or more anatomically distinct regions usual accompanying phenomena may help to distinguish possible ictal areas of origin. Therefore, a cluster of patient- and observer-reported phenomena will more accurately chart seizure origin and propagation than will a single symptom or sign. Knowledge of cortical, thalamic, and brain stem physiology will equip the physician with insightful questions of the patient and associates and will allow perceptive evaluations of video-telemetry seizure depictions. Not only will such scrutiny localize most focal seizures but also it will often distinguish primary generalized from secondarily generalized seizures.1 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - neurology.mhmedical.com/content.aspx?aid=1138409418 ER -