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  • Title: [The correlational characteristics of the electrical activity of the rabbit brain in a state of hunger].
    Author: Pavlygina RA, Liubimova IuV.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 1994; 44(3):532-40. PubMed ID: 7941717.
    Abstract:
    Motivational state of hunger, created in rabbit by alimentary deprivation, leads to an increase of coherent connections between potentials of the neocortex. In the state of hunger a complex mosaic of changes of intercentral relations of the cortical and subcortical electrical processes arises, the character of spatial potential interrelations depends on the level of alimentary motivation, created by deprivation of different duration. At daily deprivation coherence values increase in the slow-frequency band between potentials of the lateral, ventromedial hypothalamus, the medial preoptic area, and potentials of the orbitofrontal cortex. Coherence decreases between potentials of the ventromedial hypothalamus, the medial preoptic area and potentials of the sensorimotor cortex. Synchronization of electrical processes of the lateral and ventromedial hypothalamus does not significantly change. At 2-day deprivation changes of the cortical coherence become less regular than at daily deprivation. Synchronization of the electrical processes of the lateral hypothalamus and the orbitofrontal, sensorimotor-2 cortices increases, and decreases with the potentials of the sensorimotor-1 cortex. Coherence between potentials of the ventromedial hypothalamus and the orbitofrontal cortex, on the contrary, decreases, and increases with the potentials of sensorimotor-1 cortex. Synchronization of electrical activity of the lateral and ventromedial hypothalamus attains the level of 100% manifestations. It the state of hunger interhemispheric asymmetry appears in the parameters of coherence due to more regular intensification of interrelations of electrical processes in the left hemisphere.
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