If you have partial seizures, spikes and sharp waves on the EEG in a specific area of the brain, such as the a temporal lobe, can show where the seizures are coming from.Your doctor may refer to these waves as "epileptiform abnormalities" or "epilepsy waves." They can look like spikes, sharp waves, and spike-and-wave discharges. Certain other patterns indicate a tendency toward seizures.A common example of this type is called "slowing," in which the rhythm of the brain waves is slower than would be expected for the patient's age and level of alertness. For example, certain types of waves may be seen after head trauma, stroke, brain tumor, or seizures. Some abnormal patterns may occur with a number of different conditions, not just seizures. The EEG shows patterns of normal or abnormal brain electrical activity.
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