Читать книгу The Form Within - Karl H Pribram - Страница 23

Somewhat later (1960), another of the students in my laboratory (Robert Gumnit, an undergraduate at Harvard) performed a similar experiment to the one that Köhler and I had done on monkeys. In this new experiment, we used a series of clicking sounds and again demonstrated a DC shift, recording directly from the surface of the auditory cortex of cats as shown in the accompanying figure. Thus we successfully verified that there is a DC shift in the primary receiving areas of the brain when sensory receptors are stimulated. Furthermore, we demonstrated that the DC shift is accompanied by a shift from a slow to a fast rhythm of the EEG, the recording of the oscillatory electrical brain activity. Previously, human EEG recordings had shown that such a shift in the frequency of the EEG occurs when a person becomes attentive (for instance, by opening the eyes to view a scene, after having been in a relaxed state with eyes closed).