rganization. Brain Res. 787:351-357 Arnold, V.|. (1984) Catastrophe Theory. Springer-Verlag. N.Y. Arnold, V.|., Avez, A. (1968) Ergodic Problems in Classical Mechanics. Addison- Wesley. Redwood City, CA Babloyantz, A. (1986) Evidence of chaotic dynamics of brain activity during the sleep cycle. In (ed. Mayer-Kress,