http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Engel_2001_Axis_1_Ictal_Phenomenology

Engel_2001_Axis_1_Ictal_Phenomenology

Engel 2001 Axis 1 consists of a description of the ictal semiology, using a standardized Glossary of Descriptive Terminology. The description of the ictal event, without reference to etiology, anatomy, or mechanisms, can be very brief or extremely detailed, as required for clinical or research purposes. Although detailed descriptions of the onset and evolution of localized ictal phenomena often are not necessary, they can be useful; for instance, in patients who are candidates for surgical treatment, or for research designed to elucidate the anatomic substrates or pathophysiologic mechanisms underlying specific clinical behaviors. Communication among clinicians, and among researchers, will be greatly enhanced by the establishment of standardized terminology for describing ictal semiology. Engel 2006 Axis 1: Ictal phenomenology—from the Glossary of Descriptive Ictal Terminology, can be used to describe ictal events with any degree of detail needed. Axis 1 of the diagnostic scheme involves a detailed description of ictal phenomenology utilizing a glossary of descriptive ictal terminology (Blume et al., 2001). This can be extremely valuable for older patients with focal epilepsy who are being evaluated for surgical resection, but is not likely to be necessary in infants and young children, so it is optional.

http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Engel_2001_1.0_Diagnostic_Scheme