Figure 7. Effect on mean arterial blood pressure (MAP; panel A) and heart rate (HR; panel B) of bilateral microinjections of cerebrospinal fluid (CSF, 200 nl) or kynurenic acid (Kyn, 2.7 nmol/200 nl) within the caudal pressor area, and effects of electrical nucleus raphe obscurus stimulation (NROS). B1, baseline values; B2, post-drug baseline values. Data are reported as means ± SEM for 6 rats. +P<0.01 comparing B2 with B1 and *P<0.01 compared to preceding baseline values (ANOVA).