part of part_of part of part_of reticular formation A composite substructure of the brainstem that consists of the midbrain reticular formation, the pontine reticular formation and the medullary reticular formation ( Carpenter-1983 ). BAMS:RET EMAPA:35188 FMA has a spinal cord reticular formation but we follow NNs (classical) to restrict this to brainstem structures. This means we also include the MA class for brainstem reticular formation here. FMA has subtypes of reticular formation but we treat this as a composite structure FMA:77719 It is essential for governing some of the basic functions of higher organisms, and is one of the phylogenetically oldest portions of the brain. MA:0003185 MESH:D012154 UBERON:0002275 brain stem reticular formation brainstem reticular formation reticular formation (classical) reticular formation of the brainstem this class denotes the generic structure, and not a specific one such as medullary or pontine reticular formation. uberon brainstem regional part of brain