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An increase in synchronization of the activational type (coincidence of the presence of impulse activity), and a decrease of the inhibitory type (coincidence of both the presence and absence of impulse activity), in the operation of close-lying neurons were observed in the visual and sensorimotor areas of the new cortex and in the hippocampus of wakeful(More)
  • A N Balashova
  • 1984
EEG waves phase relations in the sensorimotor and visual cortical areas were studied in 12 rabbits before and during a motor reaction in response to light stimulation. Phase relations in the background activity were characterized by a considerable dispersion (from 26 to 45 degrees). Light stimulation increased the quantity of synphasic EEG oscillations in(More)
In the visual and sensorimotor areas of the neocortex and in the hippocampus of alert nonimmobilized rabbits, in response to combinations of light flashes with electrocutaneous limb stimulation an increase was observed of synchronization in the activity of the near-by neurones by activation by inhibitory type (coincidence of the presence and absence of(More)
Phase shifts of cortical electrical activity and their role in excitation irradiation from the visual zone to the motor one were studied in rabbits before and during light stimulation. Different variations of the phase relations were observed both in the background activity and during stimulation. In most cases, however, a gradual increase in the(More)
Changes in pyramidal tract response after unilateral neocortical and lateral hypothalamic tetanization were analyzed in unanesthetized and nonimmobilized rabbits. Membrane and synaptic modifications were revealed in intra- and interhemispheric connections. Changes in excitability of callosal collaterals of pyramidal tract neurons in contralateral hemisphere(More)
The effect of the theta-rhythm energy on the transmission of excitation from the visual analyser to the motor one was studied in an automatized controlled experiment. It has been found that the probability of motor reaction to a photic stimulus correlates with definite energetic characteristics of theta-rhythm in the sensorimotor and visual cortical areas.(More)
The dependence of the number of motor reactions on the phase of theta-rhythm in the cerebral cortex, during which photic stimuli were presented was studied on unanaesthetized rabbits. Single flashes were presented to animals with 1--15 min intervals when theta-rhythm was dominant in the visual cortex. Each experimental session included 10--45 photic(More)