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Functional relationships between the hypothalamus and anterior parts of the cerebral cortex during food starvation Proceedings of the Scientific Conference on the Problems of Physiology and pathology of cortico-visceral interrelations and functions of systems in the organism



Functional relationships between the hypothalamus and anterior parts of the cerebral cortex during food starvation Proceedings of the Scientific Conference on the Problems of Physiology and pathology of cortico-visceral interrelations and functions of systems in the organism



Ivanovo 321-3



In urethane-anesthetized cats, activation of the anterior cerebral cortex sections (ACS) under starvation conditions was determined chiefly on the basis of the ascending activating effects of the hypothalamus (H), particularly of its lateral and medial sections. An artificially decreased functional activity level of the H by the action on it of a direct current anode resulted in elimination of ACS activation. During intramuscular administration of atropine and amisyl to the hungry animals, the starvation-induced ACS activation was selectively blocked. A similar effect on the ASC, activated by starvation conditions, was also obtained by the use of cholinolytic substances. After a 1-day starvation, the cortex potential produced in response to stimulation of the sciatic nerve was very weak, and appeared mainly in the form of a primary positive phase. After introduction of glucose or cholinolytic substances, a distinct potential with well-defined positive and negative phases and secondary positive oscillation developed in response to this stimulation in exactly the same areas of the cortex. Application of cholinolytic substances to starvation-activated ACS of one of the cerebral hemispheres eliminated activation not only in the area of application but also, within several minutes, in lateral H sections. After a certain time, the starvation induced activation was also eliminated in the contralateral hemisphere.

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