J., Steriade, M. (1997) Spatiotemporal patterns of spindle oscillations in cortex and thalamus. J. Neurosci. 17:1179-1196 Cooper, N.G. (1987): From Cardinals to Chaos, Cambridge University Press, Cambridge. Cornfield, |.P., Fomin, S.V., Sinai, Ya.G. (1982) Ergodic Theory. Springer-Verlag. Berlin Crevier,D.W., Me