Morphologic study of the pineal gland of the dog

Authors

  • Lucas Alécio Gomes Universidade Estadual de Londrina
  • Irvênia Luiza de Santis Prada Universidade de São Paulo
  • Eduardo Cunha Farias Universidade de São Paulo
  • Jakeline Paola Zanon Universidade Estadual de Londrina
  • Selwyn Arlington Headley University of Helsinki
  • Francisco Xavier Hernandez Blazquez Universidade de São Paulo

DOI:

https://doi.org/10.5433/1679-0359.2008v29n1p137

Keywords:

Dog, Pineal, Pinealocytes, Glial cells, Macroscopic, Microscopy.

Abstract

Following the discovery of the melatonin by Lerner et al. (1958), new research and perspectives were developed in order to improve the knowledge regarding the pineal gland. This hormone is not only related to the circadian control but also influences other behavioral functions such as the reproductive cycle and thermoregulation. In this study the morphology of the pineal gland (epiphysis cerebri) from 20 dogs were analyzed by means of macroscopic and microscopic evaluation. The shape of the gland ranged from conic to “tongue-like shape” (in relation to human tongue). The gland color ranged from beige to gray-brownish and it had a gelatinous consistency. The width and length of the glands ranged from 1.38 to 2.39 mm and 1.53 to 2.96 mm, respectively. Capsule, septa, pinealocytes, glial cells and pigment granules were microscopically found in all glands. No calcareous concretions were observed.

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Author Biographies

Lucas Alécio Gomes, Universidade Estadual de Londrina

Departamento de Clínicas Veterinárias – Universidade Estadual de Londrina. Endereço para correspondência: Rua Afonso Pena, 326; Bairro: Residencial do lago II; Londrina-PR; CEP: 86062 - 140.

Irvênia Luiza de Santis Prada, Universidade de São Paulo

Professora Titular Aposentada – Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, Departamento de Cirurgia (VCI), Setor de Anatomia dos Animais Domésticos e Silvestres.

Eduardo Cunha Farias, Universidade de São Paulo

Professor Aposentado do Instituto de Ciências Biológicas, Departamento de Histologia, Embriologia e Citologia, da Universidade de São Paulo.

Jakeline Paola Zanon, Universidade Estadual de Londrina

Médica Veterinária Residente do Hospital Veterinário da Universidade Estadual de Londrina.

 

 

 

 

Selwyn Arlington Headley, University of Helsinki

Senior Lecturer, Section of Veterinary Pathology, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, FINLAND.

 

 

 

 

Francisco Xavier Hernandez Blazquez, Universidade de São Paulo

Professor da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, Departamento de Cirurgia (VCI), Setor de Anatomia dos Animais Domésticos e Silvestres.

 

 

 

 

Published

2008-08-30

How to Cite

Gomes, L. A., Prada, I. L. de S., Farias, E. C., Zanon, J. P., Headley, S. A., & Blazquez, F. X. H. (2008). Morphologic study of the pineal gland of the dog. Semina: Ciências Agrárias, 29(1), 137–150. https://doi.org/10.5433/1679-0359.2008v29n1p137

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