Cortical areas responsible for language function include Posterosuperior temporal lobe (which contains the Wernicke area) Adjacent inferior parietal lobe Posteroinferior part of the frontal lobe just anterior to the motor cortex (Broca area) Subcortical connections between those regions Damage to any part of this roughly triangular area (eg, by infarct, tumor, trauma, or degeneration) interferes with some aspect of language function.