cortex - the layer of unmyelinated neurons (the gray matter) forming the cortex of the cerebrumGolgi cell, Golgi's cell - a neuron in the cerebral cortex with short dendrites and with either a long axon or a short axon that ramifies in the gray matter cerebrum - anterior portion of the brain consisting of two hemispheres; dominant part of the brain in humans frontal lobe - that part of the cerebral cortex in either hemisphere of the brain lying directly behind the forehead parietal lobe - that part of the cerebral cortex in either hemisphere of the brain lying below the crown of the head occipital lobe - that part of the cerebral cortex in either hemisphere of the brain lying in the back of the head temporal lobe - that part of the cerebral cortex in either hemisphere of the brain lying inside the temples of the head |