The pineal gland, also known as the ‘pineal body,’ is a small endocrine gland. It is located on the back portion of the third cerebral ventricle of the brain, which is a fluid-filled space in the ...

Descartes believed the pineal gland was the seat of the soul, and doctors later thought it was man’s third or inner eye. The pineal (from the Latin word for pine cone, which it resembles in shape) is ...