means "inner chamber", and accordingly is located deep within the cerebrum. It is an egg-shaped structure lying at the very top of the brain stem, above the hypothalamus. The thalamus relays all information received from the senses (except smell) to the various processing centers in the cerebral cortex. Recent research also suggests that the thalamus regulates the electrical rhythms that parts of the brain use to communicate with each other. It has been speculated that tips of the tongue experiences (when only part of a memory is recalled) may occur when the rhythms don't synchronize with the regions properly - which would put these memory failures at the door of the thalamus. The thalamus also seems to be involved in memory consolidation processes that occur during sleep.