UDC

612.821:614.8

DOI

10.37482/2687-1491-Z013

Authors

Natal’ya Yu. Vlasenko* ORCID: 0000-0002-7091-3804
Andrey M. Grjibovski**/*** ORCID: 0000-0002-5464-0498
Mariya A. Vlasenko**** ORCID: 0000-0001-6608-5957
*Tver State Technical University (Tver, Russian Federation)
**Northern State Medical University (Arkhangelsk, Russian Federation)
***M.K. Ammosov North-Eastern Federal University (Yakutsk, Republic of Sakha (Yakutia), Russian Federation)
****N.I. Pirogov Russian National Research Medical University (Moscow, Russian Federation)
Corresponding author: Natal’ya Vlasenko, address: nab. Afanasiya Nikitina 22, Tver, 170026, Russian Federation; e-mail: natalya_vlasenko@mail.ru

Abstract

This paper aimed to assess the functional state of the central nervous system in firefighters with different lengths of service. The research involved 235 male firefighters aged between 25 and 45 years, which were divided into three groups depending on the length of service: 1) 1–6 years; 2) 7–15 years, and 3) 16–22 years. At the beginning and at the end of a 24-hour shift, the parameters of a simple visual-motor reaction were measured: speed, stability, quality and reliability; the assessment and level of activation of the central nervous system (CNS) were analysed. At the beginning of the shift, in groups 1, 2 and 3, respectively, the speed (231.07 ± 4.08; 222.14 ± 8.91; 248.00 ± 9.11 ms), stability (46.50 ± ± 2.84; 39.85 ± 6.98; 55.91 ± 7.82 ms), CNS activation assessment (0.50 ± 0.01; 0.54 ± 0.01; 0.39 ± ± 0.01 pu) and CNS level of activation (class 2.92 ± 0.31; 3.14 ± 0.40; 2.66 ± 0.33) corresponded to the average level, while quality and reliability (0.35 ± 0.01; 0.00 ± 0.00; 0.00 ± 0.00 errors) to the high level. At the end of the shift, no changes in error levels in the whole sample and most of the parameters in groups 1 and 2 were found. In group 3, a statistically significant deterioration was revealed, with lower levels of stability parameters (to 64.50 ± 8.79 ms; p = 0.028) and CNS activation assessment (to 0.30 ± ± 0.01 pu; p = 0.039). We found that longer service was significantly associated with an increased proportion of people with reduced levels of CNS activation (p = 0.007), while a 24-hour shift did not contribute to lowering these levels in the studied groups.

Keywords

simple visual-motor reaction, firefighters, length of service, functional state of the central nervous system

References

1. Tyagnerev A.T., Bezkishkiy E.N., Lobozova O.V., Stepanov V.A., Linchenko S.N., Afendikov S.G., Karakhanyan K.S. The Problem of Functional State and Working Capacity Control of Naval Personnel in the Process of Professional Activity. Marine Med., 2019, vol. 5, no. 4, pp. 74–83. DOI: 10.22328/2413-5747-2019-5-4-74-83 (in Russ.).
2. Göker Z. Fatigue in the Aviation: An Overview of the Measurements and Countermeasures. J. Aviat., 2018, vol. 2, no. 2, pp. 185–194. DOI: 10.30518/jav.451741
3. Takarae Y., Luna B., Minshew N.J., Sweeney J.A. Patterns of Visual Sensory and Sensorimotor Abnormalities in Autism Vary in Relation to History of Early Language Delay. J. Int. Neuropsychol. Soc., 2008, vol. 14, no. 6, pp. 980–989.
4. Bessonova Y., Oboznov A., Petrovich D., Murasheva O., Almayev N. Oculomotor Markers of the Visual Attention to Important Stimuli. Int. J. Psychophysiol., 2016, vol. 108, pp. 94–95.
5. Nekhoroshkova A.N., Gribanov A.V., Deputat I.S. Sensomotornye reaktsii v psikhofiziologicheskikh issledovaniyakh (obzor) [Sensomotor Reactions in Psychophysiological Studies (Review)]. Vestnik Severnogo (Arkticheskogo) federal’nogo universiteta. Ser.: Mediko-biologicheskie nauki, 2015, no. 1, pp. 38–48.
6. Shoygu Yu.S. Metodicheskoe rukovodstvo po provedeniyu professional’nogo psikhologicheskogo otbora v Ministerstve Rossiyskoy Federatsii po delam grazhdanskoy oborony, chrezvychaynym situatsiyam i likvidatsii posledstviy stikhiynykh bedstviy Rossii [Guidelines for Professional Psychological Selection in the Ministry of the Russian Federation for Civil Defence, Emergencies and Disaster Management in Russia]. Ryazan, 2013. 118 p.
7. Vlasenko N.Yu., Bodurova D.F., Makarova I.I. Psychophysiological Predictors of Personal Adaptive Capacity in Tver Region Firefighters at the Initial Working Stage. Ekologiya cheloveka, 2015, no. 3, pp. 52–57.
8. Psychophysiological Testing Device Psychophysiologist UPFT-1/30. Taganrog, 2015. 122 p. (in Russ.).
9. Grjibovski A.M. Analiz poryadkovykh dannykh [Analysis of Ordinal Data]. Ekologiya cheloveka, 2008, no. 8, pp. 56–62.
10. Olsen A.O., Grjibovski A., Magnus P., Tambs K., Harris J.R. Psoriasis in Norway as Observed in a Population-Based Norwegian Twin Panel. Br. J. Dermatol., 2005, vol. 153, no. 2, pp. 346–351. DOI: 10.1111/j.1365-2133.2005.06613.x
11. Bubnova A.E. Integrated Use of Neurophysiological and Subjective Criteria of a Developing Critical Level of Fatigue for Physiological Support of Emergency Operators. J. Med. Biol. Res., 2020, vol. 8, no. 1, pp. 5–13. DOI: 10.17238/issn2542-1298.2020.8.1.
12. Shcherbakova A.E., Popova M.A., Karimov R.R., Gritskov S.N. Functional State of the Autonomic and Central Nervous Systems in Firefighters Living in the Khanty-Mansi Autonomous Okrug – Yugra. J. Med. Biol. Res., 2019, vol. 7, no. 2, pp. 178–186. DOI: 10.17238/issn2542-1298.2019.7.2.178
13. Rodygina Yu.K., Deryagina L.E., Sidorov P.I., Solov’ev A.G. Spetsifika sensomotornykh reaktsiy sotrudnikov razlichnykh podrazdeleniy organov vnutrennikh del v zavisimosti ot stazha sluzhby [Workers of Different Departments of Inner Affairs Bodies: Sensorimotor Reactions Specificity Depending on a Length of Service]. Ekologiya cheloveka, 2003, no. 4, pp. 12–15.
14. Domrachev A.A., Mikhaylova L.A. Otsenka sostoyaniya zdorov’ya lyudey ekstremal’nykh professiy [Assessment of the Health Status of People in Extreme Professions]. Sibirskoe meditsinskoe obozrenie, 2007, no. 2, pp. 31–35.
15. Grjibovski A.M., Ivanov S.V. Cohort Studies in Health Sciences. Nauka i zdravookhranenie, 2015, no. 3, pp. 5–16.