Areas supplied by the middle cerebral artery include:
The bulk of the lateral surface of the hemisphere; except for the superior inch of the frontal and parietal lobe (anterior cerebral artery), and the inferior part of the temporal lobe.
Superior division supplies lateroinferior frontal lobe (location of Broca's area i.e. language expression)
Inferior division supplies lateral temporal lobe (location of Wernicke's area i.e. language comprehension)
Deep branches supply the basal ganglia as well as the internal capsule
MCA occlusion site and resulting Aphasia
Global – trunk of MCA
Broca – anterior branch of MCA
Wernicke – posterior branch of MCA
The MCA territory was divided into 12 areas: orbitofrontal, prefrontal, precentral, central, anterior parietal, posterior parietal, angular, temporo-occipital, posterior temporal, middle temporal, anterior temporal, and temporopolar. The smallest cortical arteries arose at the anterior end and the largest one at the posterior end of the Sylvian fissure. The largest cortical arteries supplied the temporo-occipital and angular areas 1).