This is an article covering the relations, arrangement of nuclei, tracts and arterial supply of the thalamus . Learn about this brain structure at Kenhub. The thalamus is a structure of the brain that processes and transmits sensory (except for smell) and motor information from the body to the cerebral cortex. Learn about the thalamus , a paired structure in the diencephalon that relays sensory and motor information to the cerebral cortex. Find out its location, structure, connections, functions and FAQs for NEET exam preparation. The thalamus is a mostly gray matter structure in the diencephalon in the brain that plays many essential roles and is involved in several neural functions. It is composed of various nuclei that each serve a unique role, ranging from relaying sensory and motor signals to regulating consciousness and alertness. The thalamus is a paired gray matter structure deep within the brain, thereby reflecting its primordial function, that is located adjacent to the third ventricle. Each member of the ...