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The pineal gland also called the pineal body, epiphysis cerebri, or epiphysis, is a small endocrine gland in the brain. It is shaped like a tiny pine cone,and is located near the center of the brain, between the 2hemispheres, tucked in a groove where the two rounded thalamic bodies join. It produces a hormone that may weakly modulate wake and sleep patterns. It's function is to control and regulate sleep patterns ie sleep and wake