Figure 9. Influence of [D-Pen [2,5]]-Enkephalin (DPDPE) and deltorphin (10 sup -8, 10 sup -6 M) on small pial arteries and arterioles before (control), after fluid percussion brain injury and after fluid percussion brain injury in polyethylene glycol superoxide dismutase and catalase-pretreated animals (n = 5). *P < 0.05 compared to corresponding control value;(dagger)P < 0.05 compared to corresponding fluid percussion injury value..