parafacial adjective2 •Relating to the area adjacent to the facial motor nucleus, especially the retrotrapezoid nucleus. •Relating to the area between the ptilinal fissure and the compound eye of insects.The substantia innominata of the BF is reported to project to the SWS-promoting parvicellular area of the reticular nucleus (also called the parafacial zone) [38 , 39 ]. — 2015
