Though the pineal gland wasn’t understood until the 20th century, descriptions of its anatomical location are included in the writings of Galen (ca. 130-ca. 210 CE), a Greek doctor and ...

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 ...

“While the study found a smaller pineal gland volume in OCD patients, it did not assess the hormonal changes, such as ...