THE problem of the genesis and meaning of the strange manifestations which we find in that peculiar disorder which goes by the accepted name of tics is indeed difficult of solution. The analytic and genetic standpoint only comparatively recently assumed in the domain of neurology and psychiatry is having an ever wider and wider application. The problems in neurology and psychiatry which still cry loudly for solution and rational explanation are indeed numerous. Some of these questions are so baffling that at times they seem almost beyond the ken of the human mind. Nevertheless, with persistence and the "Don't give up the ship" spirit keenly imbued into us, and with that irrepressible spirit of investigation and of research born of optimism and of curiosity, we may expect to see many of these problems which now seem to us so hopelessly unsolvable gradually rescued from the uncertain waters of speculation and theorization and brought to the more sound shores and land of the knowable and the known. If our theories be but tinctured with due admixture of that sound self-criticism that comes of prolonged and serious reflection and deliberation, and if the results of observation and investigation be brought forth in support of these theories, then we need have no hesitancy in permitting freedom in theorization and speculation. Let us also remember that unsound theories or standpoints do not come to stay, but, after surviving for a certain time, give way before that which is more sound, more tangible, more near the truth, which, to be sure, is always but approximately attained. If, therefore, the theory which I intend to set before you for consideration may seem on first thought far-fetched and unsupported, I beg you to remember that in a field where but comparatively little is known with absolute certainty, it behooves us to take notice of all theories or conclusions which may be propounded, since, even though they may not contain the whole truth, they may, perhaps, contain certain germs of truth, which may contribute, in some measure, however slight, toward the ultimate solution of the problem under consideration. With these brief prefatory remarks, I shall forthwith enter into the discussion of the genesis and meaning of the tics. I may say at once that this is not merely a theoretical and purely academic proposition which has no practical bearings in the way of prognosis and treatment. On the other hand, a real understanding of the nature, origin, and significance of the tics is of decided value in giving us proper standpoints and orientation with respect to the prevention, prognosis and cure of the condition.