part of part_of part of part_of has part has_part has part organ part pons pontine raphe nucleus superior olivary complex locus ceruleus superior salivatory nucleus pontine tegmentum BAMS:PTg DHBA:12416 Dorsal portion of the pons, containing cranial nervee nuclei, ascending and descending tracts and reticular nuclei. It is continuous with the reticular formation of the medulla (Carpenter, A Core Text of Neuroanatomy, 3rd ed, 1985, pg 133). FMA:71108 HBA:9135 UBERON:0003023 UMLS:C0228426 dorsal pons dorsal portion of pons http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=557 involved in the initiation of REM sleep [Wikipedia:Pontine_tegmentum] pars dorsalis pontis pars posterior pontis tegmental portion of pons tegmentum of pons tegmentum pontis tegmentum pontis uberon ectoderm-derived structure structure with developmental contribution from neural crest