Use the link below to share a full-text version of this article with your friends and colleagues. Learn more. Abstract: The ultrastructure of the pineal gland in the adult cat is described and compared with that of other mammals.
The pineal gland is a small, pine-cone shaped structure considered to be part of the epithalamus. It is unpaired and situated in the midline. The pineal gland typically measures around 7 x 6 x 3 mm in size and is situated in a groove between the laterally placed thalamic bodies
Please take this quick survey to tell us about what happens after you publish a paper. Acta Neuropathologica. Using a four-step immunoperoxidase PAP method and the monoclonal antibody MAbA9-C6 MAbA9-C6which defines an epitope of the retinal S-antigen S-Agwe investigated the S-Ag immunoreactivity in human fetal, newborn, infantile and adult pineal glands and in 13 human pineal parenchymal tumors.
Pineal region tumors are primary central nervous system CNS tumors. This means they begin in the brain or spinal cord. Pineal region tumors occur in children and young to middle age adults.
The adult pineal gland is composed of pinealocytes, astrocytes, microglia, and other interstitial cells that have been described in detail. However, factors that contribute to pineal development have not been fully elucidated, nor have pineal cell lineages been well characterized. We applied systematic double, triple and quadruple labeling of cell-specific markers on prenatal, postnatal and mature rat pineal gland tissue combined with confocal microscopy to provide a comprehensive view of the cellular dynamics and cell lineages that contribute to pineal gland development.
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The pineal gland or epiphysis synthesizes and secretes melatonina structurally simple hormone that communicates information about environmental lighting to various parts of the body. Ultimately, melatonin has the ability to entrain biological rhythms and has important effects on reproductive function of many animals. The light-transducing ability of the pineal gland has led some to call the pineal the "third eye". The pineal gland is a small organ shaped like a pine cone hence its name.
The pattern of waking during the day when it is light and sleeping at night when it is dark is a natural part of human life. Only recently have scientists begun to understand the alternating cycle of sleep and waking, and how it is related to daylight and darkness. A key factor in how human sleep is regulated is exposure to light or to darkness.