ABSTRACT
The unconscious excito-motor sensibility, transformed by the action of the cells belonging to the automatic sensorium, by this very circumstance acquires new properties. It plays an important part in the varied series of movements of progression, in all those of bodily exercise, in the methodical motor actions that we insensibly bring to perfection by practice and sustained attention—such as those of the hand in drawing or writing—actions which though at first conducted with the conscious participation of the sensorium, insensibly come to be executed under the sole direction of the excitations of unconscious sensibility. In taking their departure from the peripheral regions of the nervous system, which physiologically represent the frontiers of the organism, sensitive impressions, wherever they may have originated, once implanted in their tissues in the form of vibratory agitations, follow their natural channels towards the central regions. Unconscious excito-motor impressions arise, with their sister conscious impressions, in the terminal expansions of all the sensorial and sensitive nerves.
