parvocellular reticular nucleus parvocellular reticular nucleus the parvocellular reticular nucleus is part of the brain located dorsolateral to the caudal pontine reticular nucleus. parvocellular reticular nucleusdetailsidentifierslatinnucleus reticularis parvocellarisneuronames728ta98a14.1.04.312ta26030fma72575anatomical terms of neuroanatomy the dorsal portion of the reticular nucleus has been shown to innervate the mesencephalic trigeminal nucleus and its surrounding area. also, it projects to the facial nucleus, hypoglossal nucleus and parabrachial area along with parts of the caudal parvocellular reticular formation. this nucleus is also involved in expiration with a part of the gigantocellular nucleus.