ABSTRACT
The complexity of mechanism which characterizes even the simplest of our actions corresponds to the increasing complexity of organization of the neural connection established through the central nervous system. Before turning to the response mechanism it is necessary to emphasize the fact that all receptors are so constructed as to be sensitive to only one specialized type of stimulus. Of greater importance for our purpose in the sequel will be the group of glands which pour their secretion directly into the blood stream. They are at present the subject of intensive scientific research, and it is believed that they exercise a very far-reaching influence upon behaviour. Before any coherent account of the mechanism of behaviour can be given it is necessary to understand the structure and functioning of the nervous system. This then is the bodily mechanism by means of which the young child has to build up his experience of the world.
