Primal eye

(Alternative names: Pineal gland, pineal body, epiphysis cerebri, "third eye".)
"The pineal gland is a small endocrine gland in the vertebrate brain. It produces melatonin, a hormone that affects the modulation of wake/sleep patterns and photoperiodic (seasonal) functions. It is shaped like a tiny pine cone (hence its name), and is located near to the center of the brain, between the two Cerebral hemisphere, tucked in a groove where the two rounded thalamic bodies join."
911:Primal eye - Wikicompany

mind, brain