1. A method, comprising: detecting neuronal activity in the CA3 region of a patient's hippocampus; analyzing the detected neuronal activity to predict a seizure; and administering treatment in response to the step of analyzing the detected neuronal activity, wherein said analyzing step comprises comparing the detected neuronal activity with neuronal activity that was detected in the CA3 region of the patient's hippocampus and/or an at least one alternate region prior to and/or during a previous seizure.