brain spike-and-wave discharge severity grade brain type I spike-and-wave discharge severity grade 2014-01-23T19:12:14Z A measurement based on scoring the severity, for example on a scale of 0-4, of type I spike and wave discharges, a series of regular, symmetrical, generalized abnormal electrical discharges in the brain characterized by immediate, bilaterally symmetric discharges, generalized over the cortex, lasting longer than type II, and displaying an upward polarity in the spikes. CMO:0002060 JSmith brain type I SWD severity grade brain type I spike-wave activity severity grade brain type I spike-wave discharge severity grade clinical_measurement_ontology