“…served in newborn rabbits (Khazan & Sulman, 1966) and in children (Ritvo, Ornitz, La Franchi, Walter, 1967), no direct comparison has been made between growing and adult subjects. Chlorpromazine also depressed activated sleep in adult animals Uouvet, 1962; Khazan, Kawakami, Sawyer, 1963;Hishikawa et al, 1965;Jewett & Norton, 1966;Goldstein, Cardocki, Mundschenk, O'Brien, 1967), but its effects on this sleep phase in growing animals have not been studied.…”