RELATIONSHIPS BETWEEN BIOELECTRICAL PROCESSES OF THE CORTEX, THALAMUS AND MIDBRAIN RETICULAR-FORMATION DURING DEFENSIVE CONDITIONING IN RABBIT

  • 1 January 1979
    • journal article
    • research article
    • Vol. 29  (5) , 938-947
Abstract
EEG power spectra of the sensorimotor area of the neocortex, the dorsal hippocampus, midbrain reticular formation and anteroventral thalamic nucleus and corresponding coherence functions and phase spectra, undergo changes during formation and performance of defensive conditioned reflex in rabbit. In the process of conditioning a morphofunctional system of brain structures is established including the above mentioned formations. Their functional integration occurs on the basis of theta-rhythm. The execution of a conditioned act requires isorhythmicity of electrical processes within the theta-range in the studied structures and an adequate level of their excitability, which is manifested in the dominance of 6.0 cps frequency.

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