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Professor Leconte seems to go farther when he says that "in animals brain-changes are in all cases the cause of psychical phenomena; in man alone, and only in his higher activities, psychic changes precede and determine brain changes." We shall see farther on that Mr.

It contends that the important happenings are the brain-changes which are causally connected and that our thoughts, or corresponding states of consciousness, merely accompany the brain-changes, just as the shadow of a horse may be said to accompany the horse. The objections of this doctrine are: For these and other reasons epiphenomenalism is today held by few, if any, philosophers. 3rd.

But the greatest objection to the doctrine of inter-actionism is doubtless that drawn from the law of the Conservation of Energy, which says that, inasmuch as mind is a non-physical energy, inasmuch as matter cannot be affected by a non-physical cause, brain-changes cannot result from will, or the activities of the mind.

In refutation of this theory, it may be pointed out that, if brain-changes are thus caused by, or are the outer expressions of, thought why not muscular changes, and in fact all physical phenomena throughout the world everywhere? For we cannot rationally draw the line of distinction here. Such is the logical outcome of the theory and has, in fact, been accepted in this form by Fechner and others.

Psycho-Physical Parallelism. This is the doctrine maintained by Münsterberg and others. It contends that brain-changes and states of consciousness are merely coincidental in point of time, and do not ever influence each other. Their relation is that of mere coincidence or concomitance, and not causation. The two flow along, side by side, without in any way interfering with one another.