Medical Definition of Pineal gland

Pineal gland: A small gland that is located near the center of the brain. This gland secretes melatonin, and it may therefore be part of the body's sleep-regulation apparatus. Also known as pineal body.

Quick GuideDementia, Alzheimer's Disease, and Aging Brains

Dementia, Alzheimer's Disease, and Aging Brains

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Last Editorial Review: 5/13/2016

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