The Pineal Gland During Development From Fetus to Adult

Cellular proliferation in the rat pineal gland during postnatal development.

To establish a possible correlation between the rate of cellular proliferation and already documented functional and morphological characteristics of the rat pineal gland during postnatal development, the bromodeoxyuridine labelling method was used to evaluate the fraction of cells at the S phase of the cell cycle in paraffin sections from 1-, 7-, 14- and 28-day-old rats. Numerical density, tak...

Ultrastructure of the pineal gland in the adult dog.

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 th...

Neuropeptide Y in the Adult and Fetal Human Pineal Gland

Neuropeptide Y was isolated from the porcine brain in 1982 and shown to be colocalized with noradrenaline in sympathetic nerve terminals. The peptide has been demonstrated to be present in sympathetic nerve fibers innervating the pineal gland in many mammalian species. In this investigation, we show by use of immunohistochemistry that neuropeptide Y is present in nerve fibers of the adult human...

The Pineal Gland

mied nearly in tbe center of the B brain in any mammal is a small white structure, sbaped somewhat like a pinecone, called tbe pineal body. ln man this organ is rougbly a quarter of an inch long and weighs about a tenth of a gram. The function of tbe pineal body has never been clearly understood. Now that tbe role of tbe tbymus gland in establishing tbe body’s immunological defenses bas been de...

The pineal gland.