Content of fibrinogen in blood of pigs with different typological characteristics of higher nervous activity under conditions of stress

Authors

  • T. D. Voytyshyna National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • L. V. Kladnytska National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • V. I. Karpovskyi National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • O. V. Danchuk National University of Life and Environmental Sciences of Ukraine image/svg+xml

Abstract

I. Pavlov in his works showed that all reactions occurring in the body are carried out by the influence of higher nervous activity, which is regulated by the cerebral cortex, therefore, the establishment of the relationships of types of higher nervous activity with certain reactions of the organism to stress is promising area of research.

The article presents the results of research on the influence of types of higher nervous activity of pigs on the level of blood fibrinogen under the influence of technological stress. At the moment, there are already results of research on interactions and the effect of higher nervous activity on platelet dynamics and productivity of pigs under stress conditions. It also have been conducted studies in which has been established that the level of blood fibrinogen increases under conditions of stress,. But how much its increase depends on the types of higher nervous activity of pigs - is not established.

To establish the type of higher nervous activity of pigs was used the methodology developed at the Department of Physiology, Pathophysiology and Animal Immunology of the National University of Life and Environmental Sciences of Ukraine. Based on the analysis of the material were formed 4 groups of animals, with include 5 heads in each: group I - a strong, balanced moving type; group II - strong, balanced inert type; group III - strong unbalanced type; group IV - weak type of higher nervous activity. Blood for research was taken from experimental pigs in the perd before start of the experiment, on the 2nd and 15th day.

In the course of the conducted studies, it was found that the evaluation of the main cortical processes in pigs is significantly different. According to the results of the research, the average score is significantly lower than the strong balanced mobile type in a strong balanced inert, strong unbalanced and weak type, at 24.3 % (P < 0.01), 40.5 % (P < 0.01) and 64.9 % (P < 0.001) respectively. It was determined that the highest rate of blood fibrinogen before application of technological stress was in the strong unbalanced type 3.65 ± 0.20 *** g/l (P < 0.001), lowest in the strong balanced inert type 2.02 ± 0.10 g/l, which does not significantly differ from the indicators of a strong balanced moving type.

After the effect of technological stress on day 2, the level of blood fibrinogen in pigs of strong, balanced inert, strong unbalanced and weak types was significantly lower by 14.9 % (p < 0.001), 33.2 % (p < 0.001) and 17.1 % (p <0,05), respectively, relative to stress. The level of blood fibrinogen in pigs of a strong, balanced moving type did not significantly differ from that to stress and was 2.48 %, which characterizes the uniform flowing of adaptive processes. In the 15thday after exposure to stress, the level of blood fibrinogen in all groups increased compared with the 2nd day of the experiment. The level of blood fibrinogen in the strong, balanced, inert, strong unbalanced and weak types was significantly higher by 29.15 % (p < 0.001), 32.4 % (p < 0.001) and 18.64 % (p <0.05) respectively. Indicators of fibrinogen content in the blood of a strong, balanced, mobile type did not differ significantly from those under stress. Reliable inverse correlation relations between the main cortical processes and the level of fibrinogen in the blood of pigs have been established. Namely, with the force of the nervous processes at the beginning of the experiment and on the 15th day r = - 0,45-0,53 (p ≤ 0,05 ) and the balancing r = -0.61-0.76 (p ≤ 0.001). The authenticity effect of balancing influence on the level of fibrinogen in the blood of pigs during the whole period of research was revealed (η2h = 0,32 - 0,76; р ≤ 0,01 - р ≤ 0,001).

Keywords: fibrinogen, higher nervous activity, strength, balance of excitation and inhibition, mobility of cortical processes, stress, pigs

References

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Published

2017-11-25

Issue

No. 273 (2017)

Section

Article

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