The thalamus (from Greek , "chamber") is the large mass of gray matter in the dorsal part of the diencephalon of the brain with several functions such as relaying of sensory signals, including motor signals, to the cerebral cortex, and the regulation of consciousness, sleep, and alertness.

Answer this question based on the passage: where is the thalmus located in the brain? OK. Let's think. My stream of consciousness:
The important part for answering this question is: The thalamus (from Greek , "chamber") is the large mass of gray matter in the dorsal part of the diencephalon of the brain with several functions such as relaying of sensory signals, including motor signals, to the cerebral cortex, and the regulation of consciousness, sleep, and alertness. The answer is the dorsal part of the diencephalon of the brain.