Anatomical-physiological and biophysical principles of brain functioning in waking and sleep

The analysis of some features of a brain work under condition of representation of a neocortex as set of cyclic neural circuits - cells of memory, has allowed understand many effects of a brain work. In particular the essence of a cognitive, creative activity, possible pathological conditions of memory: Alzheimer’s disease, etc. is investigated. Consideration of some other structures of a brain: hippocampus, entorhinal cortex has allowed understand a phenomenon of dream, its modes, essence of dreams, functionalities of a brain during dream, etc. Mathematical modelling of the electroencephalogram rhythms carried out during phases of slow dream. Interrelation of the rhythm’s frequency of slow dream with distance between the next cyclic neural circuits is shown.