Читать книгу The Form Within - Karl H Pribram - Страница 49

In the early 1960s, when the holographic formulation of brain processes was first proposed, one of the main issues that had to be resolved was to identify the waves in the brain that constituted a hologram. It was not until I was writing this book that the issue became resolved for me. The short answer to the question as to what brainwaves are involved is that there are none.

For many years David Bohm had to chastise me for confounding waves with spectra, the results of interferences among waves. The transformation is between space-time and spectra. Waves occur in space-time as we have all experienced. Thus the work of Karen and Russell DeValois, Fergus Campbell and the rest of us did not deal with the frequency of waves but with the frequency of oscillations— the frequency of oscillations expressed as wavelets, as we shall see, between hyperpolarizations and depolarizations in the fine-fiber neuro-nodal web.

Waves are generated when the energy produced by oscillations is constrained as in a string—or at a beachfront or by the interface between wind and water. But the unconstrained oscillations do not produce waves. Tsunamis (more generally solitons) can be initiated on the east coast of Asia. Their energy is not constrained in space or time and so is spread over the entire Pacific Ocean; their effect is felt on the beaches of Hawaii. But there are no perceptible waves over the expanse of the Pacific Ocean in between. The oscillations that “carry” the energy can be experienced visually or kinesthetically, as at a beach beyond the breakers where the water makes the raft bob up and down in what is felt as a circular motion. In the brain, it is the constraints produced by sensory inputs or neuronal clocks that result in various frequencies of oscillations that we record in our ERPs and EEGs.