Journal ArticleDOI
Ultrastructure of the pineal gland in the adult dog.
TLDR
The adult dog pineal gland was studied with the electron microscope and two cell types, pinealocytes and astrocytes, could be identified in pineal parenchyma.Abstract:
The adult dog pineal gland was studied with the electron microscope. Pineal connective tissue spaces were poorly developed and showed capillaries with nonfenestrated endothelial cells. Two cell types, pinealocytes and astrocytes, could be identified in pineal parenchyma. Dog pinealocytes showed microtubules, centrioles, occasional cilia, and well-developed Golgi complexes. These cells showed thin processes with bulbous endings packed with vesicles. Astrocytes were characterized by the presence of numerous filaments. Their processes finished forming a glial layer bordering connective tissue spaces. The presence of myelinated and unmyelinated nerve fibers was also described.read more
Citations
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Journal ArticleDOI
Nonlesions, Unusual Cell Types, and Postmortem Artifacts in the Central Nervous System of Domestic Animals
TL;DR: In the central nervous system of domestic animals, numerous specialized normal structures, unusual cell types, findings of uncertain or no significance, artifacts, and various postmortem alterations can be observed.
Journal ArticleDOI
The ultrastructure of mammalian pinealocytes: a systematic investigation.
TL;DR: Whereas sufficient structural information now exists on cytoplasmic organelles such as synaptic ribbons and spherules, annulate lamellae, subsurface cisterns, and the several types of synaptic arrangements seen in relation to the pinealocyte soma and its processes, the functional role of these structures in pineal synthetic processes remains to be elucidated.
Journal ArticleDOI
Immunohistochemical study of the pineal astrocytes in the postnatal development of the cat and dog pineal gland
TL;DR: The expression of glial antigens vimentin (VIM) and glial fibrillary acidic protein (GFAP) is described in the pineal gland of cats and dogs from the first postnatal days to adulthood.
Journal ArticleDOI
Structure of the pineal gland in the adult cat
J. Boya,Calvo Jl,Dolores Rancano +2 more
TL;DR: Cat pinealocytes showed a nucleus with prominent nucleoli, a well developed Golgi apparatus, centrioles, granular endoplasmic reticulum, ribosomes, abundant microtubuli and enlarged mitochondria and their processes were characterized by the presence of abundant filaments.
Journal ArticleDOI
A combined immunohistochemical and electron microscopic study of the second cell type in the developing sheep pineal gland
TL;DR: In the course of ovine intrauterine development, the vascular affinity of this second cell population, composed of glial‐like or astrocytic cells at varying stages of maturity, leads to the formation of a limiting pineal barrier which may constitute the morphological expression of a hypothetical functional involvement in the exchange of substances between blood and pineal parenchyma.
References
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Journal ArticleDOI
The fine structure of the hamster pineal gland.
TL;DR: The pineal gland of the hamster has been examined with the electron microscope and is characterized by the presence of microtubules in addition to the usual organelles encountered in the cell body.
Journal ArticleDOI
Cytological aspects of pineal development in rats and hamsters.
TL;DR: The hypothesis that the mammalian pineal gland contains cells derived from the photoreceptor-cell line is strengthened, when considered with phylogenetic studies.
Journal ArticleDOI
Observations on the pineal system in the hamster. II. Fine structure of the deep pineal.
TL;DR: The fine structure of the deep pineal, a mass of pineal parenchyma positioned in the roof of and caudal to the pineal recess is described.