Fig. 1

Example data showing the influence of unilateral (left) common carotid artery occlusion on cerebral blood flow (CBF) and mean arterial pressure (MAP). Example images before, during, and after carotid artery occlusion are presented (a). Each image is averaged for over 5 s. CBF image is expressed as % change with respect to an image prior to carotid artery occlusion (100%) (b). The left and right sides of the image is rostral and caudal sides of the cortex, respectively. Circles in the image before occlusion (a) indicate the location of a region of interest (1.5 mm in diameter) to extract CBF values. Time courses of CBF in parietal cortex and MAP changes are presented (c, d). The upper trace in c shows CBF change in the contralateral (right) cortex of carotid artery occlusion, and the lower trace shows change in CBF in the ipsilateral (left) cortex. The period of carotid artery occlusion is indicated by a thick horizontal line on time axis. a.u., arbitrary unit