Affiliation: | Department of Psychology, University of Wisconsin, Madison, WI 53706, U.S.A.;Laboratoire de Neurophysiologie Ge´ne´rale, Section Vision, Colle`ge de France, Paris France;Department of Neurophysiology, State University of Groningen, Bloemsingel 10, Groningen ,The Netherlands;Department of Biosciences, University of Helsinki, P.O. Box 65 (Viikinkaari 1), FIN-00014 Helsinki, Finland |