part of part of reticular formation pontine reticular formation http://upload.wikimedia.org/wikipedia/commons/9/9b/Gray701.png pontine reticular nucleus BAMS:PRN pons reticular formation BIRNLEX:1050 BAMS:PRF pons of varolius reticular formation HBA:9161 SCTID:362403007 Wikipedia:Pontine_reticular_formation reticular formation of pons formatio reticularis pontis EMAPA:35693 reticular formation of pons of varolius DHBA:12480 FMA:68876 BAMS:RET-PONS UBERON:0002573 neuronames:561 UMLS:C0228428 The reticular formation is a part of the brain that is involved in actions such as awaking/sleeping cycle, and filtering incoming stimuli to discriminate irrelevant background stimuli. It is essential for governing some of the basic functions of higher organisms, and is one of the phylogenetically oldest portions of the brain. [WP,unvetted]. pontine reticular nucleus rostral part BM:Pons-PRF BAMS:PRNr pontine tegmentum nuclear complex of neuraxis gray matter of hindbrain