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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 1999; 45(5): 24-30

The characteristics of the background neuronal activity of the rostral hypothalamus and an analysis of its alteration under the influence of the stimulation of phylogenetically heterogeneous sections of the cerebral cortex

Kuznetsov IE, Natrus LV.

    M. Gorky Medical University, Ministry of Pubic Health of Ukraine, Donetsk


In acute experiments on cats under mixed narcosis (ketamine + N2O) we have investigated background firing activity of the rostral hypothalamic neurons and analyzed it modifications due to serial stimulation (100 imp/s, during 5 s) of the prefrontal, cingulate, pyriform cortices and hippocampus. Analysis of the ongoing mean frequency histograms allowed to single out three types of background firing activity with different rhythmical properties. Three types of interspike intervals distribution i.e. asymmetrical (A), symmetrical (S) and polymodal (P) have been distinguished as well. Cortical stimulation was found to transform types of interspike intervals distribution in 15% of hypothalamic neurons. S-type changed into P-type and A-type--into P-type. Author discussed correlation between the character of background firing activity, types of interspike intervals distribution and functional properties of hypothalamic neurons.


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