Regulation of CBF by corticosteroids.(a) Representative pseudocolor image of CBF ([14C]iodoantipyrine autoradiography) from coronal brain sections 1 hour after MCAo in mice treated with dexamethasone (20 mg/kg) or vehicle. (b) Regional changes in absolute CBF ([14C]iodoantipyrine) in ipsilateral and contralateral brain areas of mice treated with dexamethasone (20 mg/kg administered intraperitoneally) or vehicle (n = 10 per group). (c) Changes in absolute CBF in eNOS–/– mice were determined by the [14C]iodoamphetamine technique and expressed as percentages of contralateral CBF of vehicle-treated mice. *P < 0.05 vs. vehicle.