Basal Region B
In the postero inferior part of the thalamus is a place which raises unsolved problems. This is a place of endings of spinothalamic terminal axonal arborisations. The spinothalamic tracts ends in three "lateral elements", the VCP, VCO, and VIm. Secondly, it ends, close to these, in intralaminar-limitans elements. The third place of ending, the basal formation (not a classical nucleus, in a place that was attributed to lower pulvinar), is particular only in one place named the nucleus basalis nodalis that was claimed by some to be the only relay of pain messages from layer I of the spinal cord. This place has been shown to send axons to the insula. In fact VCP also conveys painful stimuli.
Read more about this topic: Isothalamus
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