PSYCHOPATHOLOGICAL RESEARCHES:
STUDIES IN MENTAL DISSOCIATION

Boris Sidis, M. A., Ph.D., M.D.
with
William A. White, M.D., George M. Parker, M.D.

© 1908
Boston: Richard G. Badger

The patient's subconscious reactions to rhythmic stimuli, especially to counting or to metronome beats, stand out quite distinct. The spontaneously subconsciously formed habit of keeping pace with counting and beats and of deep inspirations at multiples of five is well marked. These deep inspirations become manifested when the counts or beats are slow; when they follow in quick succession the deep inspiration is not marked―seems to disappear, but reappears with slow rhythmic, Counting and sudden stops bring about corresponding disturbances in the pneumographic curve, such as observed in tracings 5 and 7. All these changes are present alike in the different rates of rhythm given by + x or - x.