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The pineal gland of the trumpet‐tailed rat ( Octodon degus )
Author(s) -
Uría H.,
Antolín I.,
Tolivia D.,
RodríguezColunga M.J.,
MenéndezPeláez A.
Publication year - 1992
Publication title -
journal of pineal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.881
H-Index - 131
eISSN - 1600-079X
pISSN - 0742-3098
DOI - 10.1111/j.1600-079x.1992.tb00073.x
Subject(s) - pinealocyte , pineal gland , ultrastructure , biology , electron microscope , connective tissue , anatomy , population , melatonin , ganglionectomy , pathology , endocrinology , medicine , physics , genetics , alternative medicine , environmental health , optics
The structure and ultrastructure of the pineal gland of the degu or trumpet‐tailed rat ( Octodon degus ), a rodent inhabiting tropical‐equatorial areas, was examined under light and electron microscopy. On the basis of its form, size, and location, the pineal gland of the degu is classified as a proximal or “A” type. The connective tissue appeared poorly developed and the gland contained non‐fenestrated capillaries. A single population of typical pinealocytes was found. In addition, a small number of glial cells and cells with electron dense bodies appeared scattered throughout the gland. Cells with dense granules were found isolated or forming small groups always in close proximity to blood vessels. Numerous sympathetic nerve fibers with small dense‐core vesicles were found. Also, some myelinated nerve fibers were observed. The physiological significance of the presence of large electron‐dense granules in some pineal cells and their particular location around the blood vessels in discussed.