Poor articulation + maintained comprehension = Broca,s aphasia ( MCA superior division)
Maintained articulation + poor comprehension = Wernick,s aphasia ( dominant temporal lobe lesion due to inferior division MCA lesion).
Poor articulation and comprehension = global aphasia ( Complete MCA occulusion on the dominant side ) .
Higher cortical functions loss like apraxia , agnosia , and neglect are due to inferior division of cerebral artery lesion