Ir. Rezvova et al., INVESTIGATION OF THE THETA-RHYTHM OF THE RATS HIPPOCAMPUS AS NONLINEAR DYNAMIC PROCESS, Zurnal vyssej nervnoj deatelnosti im. I.P. Pavlova, 44(4-5), 1994, pp. 721-730
The theta-rythm of the rat's hippocampus in paradoxical phase of sleep
and in orientational behavior is investigated by estimating the attra
ctor's dimension. It is shown that the theta-rythm of the hippocampus
consists of a regular component and an irregular one of high dimension
which relation is in the wide variation depending on the state of the
animal. The frequency characteristics of both components are revealed
as well as the mechanisms of their forming. Some hypothesis that conc
ern their biological nature are suggested.