which gland is a small, pinecone-shaped organ that is attached by a slim stalk to the roof of the third ventricle in the brain?
Pineal Gland Is a small pinecone-shaped organ attached by a slim stalk to the roof of the third ventricle in the brain. . The hormone produced by the pineal gland is called melatonin. The pineal gland is stimulated by a group of nerve cells called the suprachiasmatic nucleus (SCN). which are located in the brain over the pathway of fibers of the optic nerve.