mean duration of a single spike-and-wave discharge train mean duration of a single type I spike-and-wave discharge train 2014-01-23T19:21:47Z CMO:0002064 Measurement of the average duration of a single set of type I spike and wave discharges, regular, symmetrical, generalized abnormal electrical discharges in the brain, in a series of episodes separated by normal brain activity, i.e. the average length of time which a type I spike and wave discharge episode lasts. Type I is characterized by immediate, bilaterally symmetric discharges, generalized over the cortex, lasting longer than type II, and displaying an upward polarity in the spikes. average brain type I spike-and-wave discharge duration clinical_measurement_ontology jsmith mean brain type I spike-and-wave discharge duration