Emotionality and the temporospatial organization of instantaneous EEG potentials

Abstract

The characteristics of the temporospatial organization of cerebral cortical potentials at different levels of genetically determined emotionality were analyzed by constructing topograms of instantaneous EEG levels in the inbred rat strains MR and MNRA. Two parameters were calculated for each topogram: the total level and the similarity coefficient. Power spectra were calculated for the values and these were found to change in an oscillatory manner. Interstrain differences were found in the correlated changes in total levels and similarity coefficients, in the durations of changes in the total level, which were more marked than those of similarity coefficients, and the nature of interhemisphere asymmetry. In MR rats, the power spectra of both measures showed significant peaks with modes at 2.0, 6.5, and 9.0 Hz. In MNRA rats, peaks in the spectra of these measures both coincided (2.0 Hz) and differed (7.0 Hz in the spectrum of the total level and 3.0, 4.5, and 6.0 Hz in the spectrum of the similarity coefficient). These data suggest different types of functioning of the reticulothalamocortical and hippocampocortical systems in rats of these strains.

Orientation and exploratory behavior and anxiety of CBA mice with anosmia induced by N-trimethylindole (skatole)

“…Various structures of the limbic system, including the anterior olfactory nucleus, piriform cortex, amygdaloid nuclei, and anterior hippocampus, receive direct projections from the olfactory bulb [4,5]. Neuroanatomical relations of the olfactory analyzer with the limbic system and other emotiogenic structures of the brain suggest the interrelation between olfaction and emotional behavior [1,2]. However, it remains unclear whether the olfactory system plays a role in the orientation and exploratory behavior and its emotional component.…”

Neuronal Networks Responsible for Genetic and Acquired (Ontogenetic) Memory: Probable Fundamental Differences

“…Since the studies of Penfield, who received selfreports from patients during surgery and electrical stimulation of different brain structures, it became known that structures of the limbic system, particularly the hypothalamus, amygdalar complex, and cingulate cortex, are involved in the realization of the function of subjective evaluation (estimation of emotional coloring) of the information fixed in the brain [3,5,15,16]. It should be emphasized that neuronal networks of our brain, whith are responsible for storing information, do not fix everything, i.e., all incoming signals; these networks select mostly the subjectively (and, respectively, biologically and/or socially) relevant information.…”