The emergence of mind and emotion in the evolution of neocortex.
The most deeply transformative concept for the growth of 21st Century psychiatry is the constellation of the chaotic dynamics of the brain. Brains are no longer seen as rational systems that are plagued with emotional disorders reflecting primitives inherited from our animal ancestors. Brains are dynamical systems that continually create patterns by acting intentionally into the environment and shaping themselves in accord with the sensory consequences of their intended actions. Emotions are now seen not as reversions to animal behaviors but as the sources of force and energy that brains require for the actions they take to understand the world and themselves. Humans are unique in experiencing consciousness of their own actions, which they experience as conscience: guilt, shame, pride and joy. Chaotic brain dynamics strives always for unity and harmony, but as a necessary condition for adaptation to a changing world, it repeatedly lapses into disorder. The successes are seen in the normal unity of consciousness; the failures are seen in the disorders that we rightly label the schizophrenias and the less severe character disorders. The foundation for healthy unity is revealed by studies in the evolution of brains, in particular the way in which neocortex of mammals emerged from the primitive allocortex of reptiles. The amazing facts of brain dynamics are now falling into several places. The power-law connectivity of cortex supports the scale-free dynamics of the global workspace in brains ranging from mouse to whale. That dynamics in humans holds the secrets of speech and symbol utilization. By recursive interactions in vast areas of human neocortex the scale-free connectivity supports our unified consciousness. Here in this dynamics are to be sought the keys to understanding and treating the disorders that uniquely plague the human mind.
Department of Molecular & Cell Biology, University of California, Berkeley, CA, USA. dfreeman@calmail.berkeley.edu
Walter J
WJ
Freeman
D000818:Animals; D005075:Biological Evolution; D001921:Brain / Q000502:physiology; D003242:Conscience; D003243:Consciousness; D004644:Emotions; D006801:Humans; D008322:Mammals; D019579:Neocortex / Q000502:physiology* / Q000503:physiopathology; D012559:Schizophrenia / Q000503:physiopathology; D012660:Semantics; D013060:Speech; D013561:Symbolism