Jones describes the pyramidal and extrapyramidal, orthosympathetic and parasympathetic innervations of the anal sphincter and bladder with reference to the problems of training. The pyramidal tracts are myelinated at about the age of one year, and the prematurely trained infant must then relearn to control by use of the pyramidal tract and cortex what he has already learned to control extrapyramidally. The breakdown of training during the second or third year may be due to this change in controls. 'There is a relation between premature training in cleanliness on "moral" grounds, and later neurosis.'