Video narration
Let's tour the superolateral surface of the brain-the upper, outer side of one cerebral hemisphere. First, orient yourself: the front is the frontal lobe, the back is the occipital lobe, the top-back is the parietal lobe, and the side-lower area is the temporal lobe. The most important groove here is the central sulcus. It separates the frontal lobe from the parietal lobe. Just in front of it is the precentral gyrus, linked to voluntary movement; just behind it is the postcentral gyrus, linked to touch and body sensation. Another key landmark is the lateral sulcus, which runs along the side and marks off the temporal lobe below from the frontal and parietal lobes above. Finally, notice the smaller folds and grooves-gyri and sulci-that increase surface area and give each brain its unique pattern.