Either of two large ovoid masses of gray
matter in the vertebrate forebrain.
The thalamus lies above the hypothalamus.
All sensory input (except for olefaction) passes through the thalamus on
the way to the somatic-sensory regions of the cerebral
cortex and then returns to it from there. All signals from the cerebellum
pass through the thalamus on the way to the motor areas of the cerebral