By convention, the cerebrum is subdivided into lobes named after the bones of the skull beneath which they are located. The central sulcus divides the frontal lobe from the parietal lobe. The temporal lobe lies immediately ventral to the deep lateral (Sylvian) fissure. The occipital lobe lies right at the back of the cerebrum, next to both parietal and temporal lobes. A buried piece of the cortex, the insula (Latin for 'island), is exposed if the margins of the lateral fissure are pulled apart (smaller image). The insula borders and separates the temporal and frontal lobes.
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