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The Pineal Gland

Open access
Wurtman, Richard J., Axelrod, Julius·1965·Scientific American

Abstract

Buried nearly in the center of the brain in any mammal is a small white structure, shaped somewhat like a pinecone, called the pineal body. In man this organ is roughly a quarter of an inch long and weighs about a tenth of a gram. The function of the pineal body has never been clearly understood. Now that the role of the thymus gland in establishing the body's immunological defenses has been demonstrated, the pineal has become perhaps the last great mystery in the physiology of mammalian organs. This mystery may be nearing a solution: studies conducted within the past few years indicate that the pineal is an intricate and sensitive "biological clock," converting cyclic nervous activity generated by light in the environment into endocrine-that is, hormonal-information. It is not yet certain what physiological processes depend on the pineal clock for cues, but the evidence at hand suggests that the pineal participates in some way in the regulation of the gonads, or sex glands.

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Metadata

Authors
Wurtman, R. J., & Axelrod, J.
Venue
Scientific American
Published
1965-07
Volume
213
Issue
1
Pages
50-60
ISSN
0036-8733 (ISSN-L)
OpenAlex
W2983445473
Cited by
773
References
0
FWCI
16.60
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The Pineal Gland. https://app.cochat.ai/papers/10.1038/scientificamerican0765-50
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Wurtman, R. J., & Axelrod, J. (1965). The Pineal Gland. Scientific American. https://doi.org/10.1038/scientificamerican0765-50

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.