The parasympathetic cardiac modulation in the Tambaqui(Colossoma macropomum): The unequal influences of the right and left vagus nerve

• Grant number: 16/17572-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2017
• End date: October 31, 2020
• Field of knowledge: Biological Sciences - Zoology - Physiology of Recent Groups
• Principal Investigator: Luiz Henrique Florindo
• Grantee: Victor Hugo da Silva Braga
• Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil

Abstract

Aerobic metabolism demands an intricate control of heart rate and ventilation. Especially in fish, which perform its gas exchange in an environment (water) which has oxygen concentration 30 times smaller and 1000 times higher density compared with the atmospheric air - hindering the breathing efficiency of these animals. Thus, this complex control must be able to perform very quick adjustments in order to maintain its efficiency. This is the role of the autonomic nervous system (ANS), where the parasympathetic division is able to perform these adjustments almost instantly controlling the heart rate beat to beat and thus keeping blood pressure and the breathing pattern necessary for the maintenance of homeostasis. The SNA operates in cardiorespiratory control through nerve projections that form the vagus nerve. Recent evidence points to a lateralization of this nerve in groups as reptiles and mammals, and the right and left sides having different functions in cardiorespiratory control. Thus the present proposal aims to reveal the existence of lateralization in fish and better understand this control and its central nervous system sources, as well as its role in cardiorespiratory patterns of these animals.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ARMELIN, VINICIUS A.; DA SILVA BRAGA, VICTOR H.; TEIXEIRA, MARIANA T.; GUAGNONI, IGOR N.; WANG, TOBIAS; FLORINDO, LUIZ H.. The nonpharmacological sequence method provides a reliable evaluation of baroreflex sensitivity in fish. JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY, v. 335, n. 3, JAN 2021. (16/17572-5, 08/57712-4)

ARMELIN, VINICIUS ARAUJO; DA SILVA BRAGA, VICTOR HUGO; TEIXEIRA, MARIANA TEODORO; GUAGNONI, IGOR NOLL; WANG, TOBIAS; FLORINDO, LUIZ HENRIQUE. he baroreflex in aquatic and amphibious teleosts: Does terrestriality represent a significant driving force for the evolution of a more effective baroreflex in vertebrates. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY, v. 255, MAY 2021. (16/17572-5, 08/57712-4)

ARMELIN, VINICIUS A.; DA SILVA BRAGA, VICTOR H.; TEIXEIRA, MARIANA T.; GUAGNONI, IGOR N.; WANG, TOBIAS; FLORINDO, LUIZ H.. The nonpharmacological sequence method provides a reliable evaluation of baroreflex sensitivity in fish. OURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOG, v. 335, n. 3, p. 11-pg., 2021-01-27. (16/17572-5, 08/57712-4)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

BRAGA, Victor Hugo da Silva. The lateralization of the parasympathetic autonomic nervous system: evidence in the cardiac control of tambaqui (Colossoma macropomum) and white sturgeon (Acipenser transmontanus). 2020. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Biociências Letras e Ciências Exatas. São José do Rio Preto São José do Rio Preto.