Match the Following Diencephalon Brain Structures with its general function: region of nuclei below the thalamus that regulate the body's homeostasis including hunger, thirst, water balance, hormone levels, and body temperature. posterior to thalamus and dominated by the pineal gland which secretes melatonin to regulate the sleep-wake cycle egg-shaped group of nuclei (clusters of gray matter in the CNS) where sensory impulses synapse and are directed to the appropriate areas of the cerebral cortex [Choose] [Choose] [Choose] > > >