is part of the diencephalon
, a portion of the brain
of higher organisms including humans. The neothalamus receives input from the thalamus
and projects to the association
areas of the neocortex
. It contains the largest division of nuclei
in the brain and is larger in animals with a well-developed cortex
Nociceptive signals received in the spinal cord from primary afferent neurons are projected via secondary afferent neurons, specifically, via the neospinothalamic tract, through the neothalamus, where the tract terminates, to the somatosensory cortex.