| Noun | 1. | frontal cortex - that part of the cerebral cortex in either hemisphere of the brain lying directly behind the foreheadcerebral cortex, cerebral mantle, cortex, pallium - the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum frontal gyrus - any of the convolutions of the outer surface of the frontal lobe of the cerebrum precentral gyrus - the convolution of the frontal lobe that is bounded in back by the central sulcus and that contains the motor area lobe - (anatomy) a somewhat rounded subdivision of a bodily organ or part; "ear lobe" |