Measurement of the cumulated duration of spikes and waves occurring per unit of time during a series of regular, symmetrical, generalized abnormal electrical discharges in the brain, the portion of the central nervous system enclosed within the cranium which is composed of gray matter and white matter and is the primary center for the regulation and control of bodily activities, receiving and interpreting sensory impulses, and transmitting information to the muscles and body organs.
mean duration of a single spike-and-wave discharge train +