Ra. Pavlygina et Yv. Lyubimova, CORRELATIVE CHARACTERISTICS OF THE BRAIN ELECTRICAL-ACTIVITY OF RABBIT IN THE STATE OF HUNGER, Zurnal vyssej nervnoj deatelnosti im. I.P. Pavlova, 44(3), 1994, pp. 532-540
Motivational state of hunger, created in rabbit by alimentary deprivat
ion, leads to an increase of coherent connections between potentials o
f the neocortex. In the state of hunger a complex mosaic of changes of
intercentral relations of the cortical and subcortical electrical pro
cesses arises, the character of spatial potential interrelations depen
ds on the level of alimentary motivation, created by deprivation of di
fferent duration. At daily deprivation coherence values increase in th
e slow-frequency band between potentials of the lateral, ventromedial
hypothalamus, the medial preoptic area, and potentials of the orbitofr
ontal cortex. Coherence decreases between potentials of the ventromedi
al hypothalamus, the medial preoptic area and potentials of the sensor
imotor 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 cortice
s increases, and decreases with the potentials of the sensorimotor-1 c
ortex. Coherence between potentials of the ventromedial hypothalamus a
nd the orbitofrontal cortex, on the contrary, decreases, and increases
with the potentials of sensorimotor-1 cortex. Synchronization of elec
trical activity of the lateral and ventromedial hypothalamus attains t
he level of 100% manifestations. It the state of hunger interhemispher
ic asymmetry appears in the parameters of coherence due to more regula
r intensification of interrelations of electrical processes in the lef
t hemisphere.