Coherence analysis of electrical activity in the rabbit brain during the process of substitution of dominants.
Coherence analysis was used to study intercenter relationships between biopotentials in the sensorimotor cortex (forelimb and blink representation areas) and the visual cortex in both hemispheres and the ventrolateral nucleus of the thalamus (VPL) of the left and right thalami during the formation of a motor defensive dominant (electrical stimulation of the limb skin) on a background of an induced (by stimulation of the cornea with an air jet) blink dominant. Characteristic electrophysiological measures of the dominant state (increases in the mean coherence level of potentials in the delta frequency range in structures involved in the functional defensive limb reflex system), along with the absence of behavioral manifestations of the motor dominant in the blink dominant, indicated that a cryptic potential dominant focus was created in the CNS in these conditions, and that this affected ongoing animal activity.
Roshchina
G Y
GY
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
Davydov
V I
VI
D000374:Aggression / Q000502:physiology; D000818:Animals; D001767:Blinking / Q000502:physiology; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D004594:Electrophysiology; D005552:Forelimb / Q000294:innervation / Q000502:physiology; D005583:Fourier Analysis; D007839:Functional Laterality / Q000502:physiology; D009044:Motor Cortex / Q000033:anatomy & histology / Q000502:physiology*; D009434:Neural Pathways / Q000033:anatomy & histology / Q000502:physiology; D010812:Physical Stimulation; D011817:Rabbits; D013003:Somatosensory Cortex / Q000033:anatomy & histology / Q000502:physiology*; D020651:Ventral Thalamic Nuclei / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology