Starting with the idea that an animal in its own territory and in familiar surroundings feels both secure and more lively, this paper proceeds to the hypothesis that then the emotional parts of its brain are ‘not being overloaded’. The author wants to see a connection between anxiety and inhibition on the one hand and overloading of these parts on the other. This is an intriguing and interesting but speculative idea. For instance, ‘overloading’ needs to be made more precise in physiological terms. There may be a connection between overcrowding, ‘overstimulation’ and overloading of the septum, but this is not really demonstrated by the author except on the basis of similarity or analogy. This sort of speculation is, however, well worth while. In this paper it is still at the ‘good idea’ stage and would need a lot more work and substantiating even before it was taken to some kind of experimental stage.