Fig. 1.
Maximum percent increase in pial arteriolar diameter during superfusion of 30 and 100 μM α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) in control group (n = 8) and a group superfused with Nω-nitro-L-arginine (L-NNA, n = 7). Values are means ± SD. There was no significant effect of L-NNA on the AMPA response. In another group (n = 8), L-NNA reduced the dilator response to 100 μM N-methyl-D-aspartate (NMDA). *P < 0.05 vs. control.