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O P Trachenko

Publications and source records attributed to O P Trachenko.

17 recordsLinked to original sources
PubMedDate not supplied

[Neuronal reactions of the olfactory centers of the forebrain during stimulation of the hypothalamic structures in rabbits].

During stimulation of phylogenetically ancient parts of the hypothalamus (the anterior and lateral), neuronal reactions have been recorded in the prepyriform lobe and tuberculum olfactorium. These reactions are characterized by a short latent period (6-25 msec) and high stability to rhythmic stimulation. Neuronal reactions in the same olfactory centers during stimulation of phylogenetically more recent hypothalamic structures (the posterior and medial) exhibit a long latent period (30-120 msec) and are readily exhausted by rhythmic stimulation.

Animals↗
PubMedDate not supplied

[Functional organization of the rabbit hypothalamo-paleocortical system].

Investigation of the ascending hypothalamic connections with principal paleocortical centers (the olfactory tubercule, prepiryform cortex) indicates that the most short latent, poorly exhausted by rhythmic stimulation or by neuronal reactions EPs in these olfactory centers are elicited by stimulation of phylogenetically ancient hypothalamic areas of the anterior LPO and lateral LHA. It was also shown that the third deep layer of the prepiryform cortex is the main center for total ascending afferentation from these ancient parts of the hypothalamus. EPs and cellular responses to stimulation of phylogenetically new hypothalamic regions could be revealed with difficulties and were characterized by long latent periods or high degree of exhaustion by rhythmic stimulation. Paleo-hypothalamic system in the rabbit exhibits strict organization of functional connections. It was demonstrated that during stimulation of the main olfactory centers of the forebrain, EPs and neuronal responses originate chiefly in the anterior (LPO) and in the narrow zone of the lateral hypothalamus. Under the conditions used, cellular responses in VMH and SMA were not revealed.

Afferent Pathways↗