part of part of nucleus raphe magnus nucleus raphe pallidus nucleus raphe obscurus http://upload.wikimedia.org/wikipedia/commons/9/94/Gray694.png DHBA:12643 BIRNLEX:1369 BAMS:ROb MA:0002981 Wikipedia:Nucleus_raphe_obscurus HBA:9646 nucleus raphes obscurus BAMS:RO nucleus raphC) obscurus MESH:D065849 FMA:72585 UMLS:C0175516 MBA:222 neuronames:740 EMAPA:37730 UBERON:0002684 The raphe obscurus projects to the cerebellar lobes VI and VII and to crus II along with the nucleus raphe pontis . This so called obscure nucleus has also been implicated in the modulation of the hypoglossal nerve. It has been observed that the ablation of this nucleus causes a change in the firing pattern in the XII nerve . In addition, the raphe obscurus mediates expiration via the inhibitory effect of serotonin and depresses periodic synaptic potentials . It has also been shown that this nucleus stimulates gastrointestinal motor function; microinjections of 5-HT into the n.r. obscurus increase gastric movement . [WP,unvetted]. nucleus raphes obscurus raphe obscurus nucleus obscurus raphe nucleus medullary raphe nuclear complex nucleus of medulla oblongata