psychoactivityn.

1894 Mind 3 276 It is not only that difference and continuity are the forms and conditions of conscious existence, but that a sense of difference and a sense of continuity must accompany all modes of psycho-activity.

1914 Canad. Jrnl. Med. & Surg. 36 128 External impressions in states of mental depression or confusional insanity, are vague,..while questions put are not understood or answered, or answered only after repetition. The reactions may become so slight as to result in practical paralysis of psycho-activity.

1959 Brit. Jrnl. Med. Hypnotism 11 15/2 The neo-cortical psychoactivity of man, such as determined by specifically-human ‘iso-cortical’ organisations, and its intellectual methods of influencing.

1956 Neuropharmacol.: Trans. 2nd Conf. 186 Substances that had the power of epinephrine and its derivatives, and the psychoactivity of mescaline but not its pressor effects.

1971 McGraw-Hill Yearbk. Sci. & Technol. 357/2 These tribesmen, having discovered that the narcotic constituent of the mushroom is excreted with almost undiminished psychoactivity, incorporated a ritual urine-drinking ceremony.

1993 28th Rep. WHO Expert Comm. Drug Dependence (World Health Org.) No. 836. v. 19 Plant products containing psychoactive substances..usually have only mild psychoactivity in the form used.

2003 Schizophrenia Res. 60 95/2 The psycho-activity of nutmeg is attributed to its structural similarity to serotonin antagonists such as reserpine.