[The variously directed reactions of the pial and cortical arterial branches in postischemic hyperemia in the cerebral cortex].

In adult rabbits, functional behaviour of pial and cortical (radial) arteries was rather different: the pial arteries showed regular dilatation while the lumen of the cortical arteries underwent regular reduction. Despite the different responses of the arterial segments, the vascular resistance diminished entailing an increase of local blood flow in the cerebral cortex.