4:871-877 Korsch, H.J., Jodl, H. (1993) Chaos; A Program Collection for the PC. Springer- Verlag. Krebs-Thomson, K., Lehmann-Masten, V., Naiem, S., Paulus, M.P., Geyer, M.A. (1998a) Modulation of phencyclidine-induced changes in locomotor activity and patterns in rats by serotonin. Eur. J. Pharmacol. 3

ive time in occupancy of these possibles, the probables, form the bases for the computation of these two kinds of entropies. For example, the work of Paulus and Geyer showed that the administration of a very small amount of stimulant drug, compared with a salt water control, led to an increase in the firs