A, ADULT, ARTERY, BASILAR, BLOOD, BRAIN, CEREBRAL, CEREBRUM, CIRCULATION, COLOURED, FLOW, HEAD, HEALTHY, HUMAN, IMAGING, MAGNETIC, MEDICAL, MRI, NERVOUS, NEUROLOGY, NORMAL, OF, PATIENT, PHANIE, RADIOLOGY, RESONANCE, SAGITTAL, SCAN, SECTION, SHOWING, STEM, SYSTEM, THROUGH, VOISIN,