Overview Introduction Anatomy the cerebral cortex contains eminences (termed gyri) and spaces separating these eminences (termed sulci) sulci include lateral (Sylvian) fissure separates the temporal lobe from the frontal and parietal lobe central sulcus separates the frontal lobe from the parietal lobe note that anterior to this sulci is the precentral gyrus and posterior to the this sulci is the postcentral gyrus the precentral gyrus is the primary motor cortex the postcentral gyrus is the primary somatosensory cortex parieto-occipital sulcus which separates the parietal lobe from the occipital lobe and can best be seen medially calcarine sulcus which separates the cuneus from the lingual gyrus the lobes of the cerebral cortex includes frontal lobe primary motor cortex and premotor cortex are involved in contralateral movement Broca area is involved in producing speech frontal eye fields are involved in eye movement prefrontal cortex is involved (this is a simplification) in restraint initiative order parietal lobe primary somatosensory cortex is involved in receiving contralateral sensory information Wernicke area (junction of parietal and temporal lobes) is involved in language comprehension temporal lobe primary auditory cortex is involved in processing sound occipital lobe visual and visual association cortex is essential for receiving and recognizing visual stimuli Blood supply the brain receives blood from the internal carotid and vertebral arteries anastomoses of the internal carotid arteries and basilar artery results in the formation of the circle of Willis the blood supply will be simplified as follows middle cerebral artery supplies blood to most of the lateral surface of the brain as well as the posterior limb and genu of the internal capsule anterior cerebral artery supplies the medial surface of the parietal and frontal lobe as well as the anterior limb of the internal capsule posterior cerebral artery supplies the occipital lobes