Abstract
Changes in the concept of the eeg as primarily an aid in assessing the normality of the resting "inactive" brain to a dynamic formulation of it as an indicator of the brain in action has suggested a wider application of the eeg to the study of behavior. It should be no surprise if, in addition to the newer applications of the eeg in neurosurgery, it is in the investigation of the physiology of learning, of behavior and of conditioned reflexes that the major contributions of the next few years will lie.