ventral nucleus of thalamus ventral anterior nucleus of thalamus A nucleus anteriorly located within the ventral nuclei of the thalamus, posterior to the reticular nucleus, anterior to the ventral lateral nucleus, and lateral and medial to the internal and external medullary laminae, respectively; it is subdivided into magnocellular and principal divisions. BTO:0002468 BrendaTissueOBO nucleus ventralis anterior thalami