The Tentorium Cerebelli is a structure in the brain that resembles a tent. It is a fold of the dura mater, which is the tough outer layer of the meninges that protect the brain. The tentorium separates the cerebellum, located at the back of the brain, from the cerebrum, which is the larger, upper part of the brain. This structure plays a crucial role in supporting the brain and maintaining its position within the skull. It also helps to protect the cerebellum from potential damage caused by movements of the cerebrum. The tentorium is important for overall brain function and stability.