part of part of in taxon surrounded by surrounded by Mammalia gyrus Wikipedia:Gyrus A ridge on the cerebral cortex. It is generally surrounded by one or more sulci . neuraxis gyrus neuronames:1211 cerebral gyrus UBERON:0000200 FMA:83874 gyrus of neuraxis SCTID:279165009 gyrus of cerebral hemisphere gyrus of cerebrum BTO:0002495 NCIT:C32290 folium of brain folium cerebral cortex cerebral hemisphere sulcus of brain morphological feature