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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. 2012; 58(5): 44-55

Food-procuring stereotype movements is accompanied by changes of c-Fos gene expression in the amygdala and modulation of heart rate in rats

Dovgan' OV, Vlasenko OV, Buzyka TV, Maĭs'kyĭ VO, Piliavs'kyĭ OI, Maznychenko AV.

  1. M.I. Pirogov National Medical University, Vinnitsa, Ukraine
  2. I.I. Mechnikov National University, Odessa, Ukraine
  3. O.O. Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine


The distribution of Fos-immunoreactive (Fos-ir) and NADPH-diapporase reactive (NADPH-dr-) neurons in the different subnuclei of amygdala and insular cortex (on the level -2,12 to -3,14 mm from bregma), and the associated changes of heart rate (HR) in intact, food-deprivated and executed food-procuring movements of rats were studied. In comparison with other groups of animals, the mean number of the Fos-ir neurons in the central nucleus of amygdala (Ce) and the insular cortex (GI/DI) at all studied levels was signifcantly greater in the executed food-procuring movements in rats. The main focus of localization of the Fos-ir neurons was found in lat­eral part of the Ce (58,5 ± 1,9 units in 40-mm-thick section) at the level -2,56 mm. The mean number of Fos-ir neurons was signifcantly greater also in the lateral and capsular parts of the Ce. The mean number of Fos-ir neurons in the GI/DI was 165,5 ± 3,2 cells in section. The number and density of NADPH-d reactive neurons was not signifcantly different in the brain structures of all animal groups studied. The double stained neurons (Fos-ir + NADPH-dr) were registered in me­dial, basolateral, anterior cortical amygdaloid nuclei and sub-stantia innominata (SI) in rats after realization food-procuring movements. It was found that realization of food-procuring movements by the forelimb during repeated sessions was ac­companied with the gradual decline of mean values of the HR (from 5% to 12% of control level) with subsequent renewal of them to the initial values (tonic component). The analysis of dynamics of the HR changes during realization of separate purposeful motion has shown the transient period of the HR suppression (500 ms), which coincided with the terminal phase of grasping of food pellet (phasic component). We suggest that the revealed focuses of localization of Fos-ir neurons in the lateral and medial subregions of amigdaloid Ce and also GI/ DI, and SI testifed that these structures of brain are involved in generation of the goal-directed motions. Direct projections of these subnuclei (and hypothalamus) to the cardiovascular centers of the medulla determine the associated regulation of the cardiovascular system function in the period of realization of the goal-directed motions in animals.

Keywords: operant reflex, c-fos expression, NADPH-d reactivity,amygdala, insular cortex, rat.


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