what does the pineal gland regulate
The pineal gland is located deep in the brain in an area called the epithalamus,where the two halves of the brain join. In humans, this is situated in the middle of the brain; it sits in a groove just above the thalamus which is an area that co-ordinates a variety of functions related to our senses. The pineal gland contains high levels of calcium and can be used by radiographers to mark the middle of the brain in X-ray images.