By J. C. Eccles (auth.), Behram Kursunoglu, Stephan L. Mintz, Susan M. Widmayer (eds.)

This quantity includes the papers awarded in the course of the Neurophysiology consultation of the 1st Orbis Scientiae of the heart for Theoretical experiences, college of Miami, Coral Gables, Florida. With this primary Orbis which met from January 7 - eleven, 1974, the heart for Theoretical experiences has inaugerated a brand new set of annual gatherings dedicated to the common sciences and to difficulties at the "interface" of technological know-how and society. The content material of the talks provided ranged over a wide selection of issues in neurophysiology, biophysics and biochemistry. many of the talks involved a variety of facets of the mind and its services. fresh effects have been additionally provided at the physics and chemistry of membranes. The papers within the quantity are awarded within the order during which they have been initially added. distinctive thank you are as a result of Mrs. Helga Billings, leave out Sara Lesser and Mrs. Jacquelyn Zagursky for the typing of the manuscript and for his or her effective and joyful recognition to the main points of the conference.

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Signals are Thus, instead of the simplicity indicated in Figs. 7 and 8, we have to envisage an irregular seething activity of the whole assemblages of neurones, the signals being superimposed on this background by phases of collusive activity of neurones in parallel either within modules or between modules. One can surmise that, from the extreme complexity and refinement of its modular organization, there must be an unimagined richness of properties in the active cerebral cortex. It is postulated that, in a situation where the pure ego is operative (cf.

The basic operations of the brain are genetically programmed and provide stereotyped responses to some environmental stimuli. In all higher animals, however, the brain is constantly reprogramming itself to modify its output on the basis of "learned" information. Besides the 44 GEORGES UNGAR genetic program, each brain has its individual "history" that becomes an integral part of its information store. The nervous system is not a piece of inert machinery; it has a baseline spontaneous activity that is modified by inputs.

These mechanisms assure that a liver cell will not grow into a neuron or vice-versa. These examples of chemical computation should suffice to illustrate the way in which biological systems handle information, by converting it into molecular structures which can then be processed by the chemical machinery of living matter. It is now widely recognized that living GEORGES UNGAR 46 systems are essentially chemical machines; they derive their energy from chemical reactions and they are controlled by chemical agents capable of combining with their constituents.

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