Abstract
The relation of neurophysiology to psychiatry is obviously too close and too extensive to be discussed adequately in one lecture. I must content myself with indicating the field in general, and with taking up in particular some one phase of the relationship. To begin with, let me ask how closely physiology and psychiatry really approach each other? Figure 1 diagrammatically illustrates their connection. Such a structure as the science of psychiatry should be based more and more on the better known, the more "exact," sciences. Anatomy, with some help from physics and chemistry, may be indicated as the main support. Built on these, there is a considerable block of physiology; just above comes the more complex but similar science, experimental psychology. These studies are all "close to the ground" and are well founded on controllable observations. If one wishes to build higher, to things mental, one finds just above these

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