Fig. 1. Influence of hypotension (moderate [MOD], severe [SEV]) on pial small artery and arteriole diameter before fluid percussion injury (FPI) (control), after FPI, and after FPI in ZD 7155- and PD 123,319-pretreated animals (n = 6). *P < 0.05 compared to control; +P < 0.05 compared to FPI nonpretreated value.