“…Studies performed on psychiatric patients mainly showed an increase of slow waves, slowing of the alpha rhythm, and the appearance of pathological patterns [Andreani et al, 1958;Kalinowsky and Hoch, 1961;Mayfield and Brown, 1966;Platman and Fieve, 1969;Johnson, 1969;Johnson et al, 1970;Helmchen and Kanowski, 1971;Itil and Akpinar, 1971;Bily et al, 1973;Gottschalk and Sack, 1973;Zakowska-Dabrowska and Rybakowski, 1973;Heninger, 1974;Okuma et al, 1974;Bente et al, 1982;Ulrich et al, 1982: Beaubernard et al, 1987, It should also be mentioned that the effect of lithium in epileptic patients remains controversial [Gershon, 1968;Erwin et al, 1973;Jus et al, 1973]. As for the serum lithium level measured in these dif ferent studies, it varied within as well as between studies considerably.…”