Ramification and distribution of the phrenic nerves in the muscle diaphragm of the domestic cat

  • Pamela Rodrigues Reina Moreira Universidade de Marília, Faculdade de Ciências Agrárias, Marília, SP
  • Gregório Corrêa Guimarães Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP
  • Márcia Rita Fernandes Machado Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP
  • André Luiz Quagliatto Santos Universidade Federal de Uberlândia, Faculdade de Medicina Veterinária, Uberlândia, MG
  • Sílvia Helena Brendolan Gerbasi Centro Universitário Barão de Mauá, Ribeirão Preto, SP
  • Maria Angélica Miglino Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
Keywords: Ramification, Distribution, Phrenic nerve, Cat

Abstract

The ramification and the distribution of the phrenic nerves right and left had been studied in 30 muscles diaphragms of unknown breed adult domestic cats, 7 males and 23 females, and were fixed in 10% buffered formalin solution. After fixation and dissection, it was observed that the phrenic nerves ramified for the respective carnous parts of the muscle diaphragm, pars lumbalis, costalis and sternalis, and had finished in higher frequency in dorsolateral trunk and ventral branch (63.33%). We observed the following arrangements: dorsal, ventral and lateral branches (25.0%); dorsal branch and ventrolateral trunk (6.66%); dorsolateral and ventrolateral trunks (3.33%); dorsolateral trunk, lateral and ventral branches (1.66%). The phrenic nerves had distributed symmetrically in 11 samples (36.66%), only showing the termination in dorsolateral trunk and ventral branch. The dorsal branches supplied pars lumbalis (73.33% to right and 56.66% to the left) and pars costalis (13.33% to right and 10.0% to the left). The right dorsal branch supplied the crus mediale dexter of the right pillar (100.0%) and the left dorsal branch supplied the crus mediale sinister of the right pillar and the left pillar (100.0%). The lateral branches supply pars lumbalis (23.33% to right and 33.33% to the left), pars costalis (96.66% to right and 100.0% to the left) and pars sternalis (3.33% only to the right). The ventral branches supplied the ventral region of pars costalis (46.66% to right and 43.33% to the left) and pars sternalis (96.66% to right and 100.0% to the left). Four female animals (13.33%) had shown fibers crossing proceeding from the left ventral branch for right antimere had been that in one of these samples (3.33%) occurred connection between the left ventral branch and the right.

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Published
2007-08-01
How to Cite
Moreira, P., Guimarães, G., Machado, M., Santos, A., Gerbasi, S., & Miglino, M. (2007). Ramification and distribution of the phrenic nerves in the muscle diaphragm of the domestic cat. Brazilian Journal of Veterinary Research and Animal Science, 44(4), 290-296. https://doi.org/10.11606/issn.1678-4456.bjvras.2007.26630
Section
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