FIGURE 2.21 Broca’s and Wernicke’s Areas of the Cerebral Cortex Broca’s area, located on the lower frontal lobe, is involved in the production of speech. Wernicke’s area, found in the temporal lobe, is important in the comprehension of written or spoken language. Damage to either of these areas will produce different types of speech disturbances, or aphasia. In most people, both areas are found in the left hemisphere..