Figure 5. 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 ventrolateral medulla and effects of electrical nucleus raphe obscurus stimulation (NROS). B1, baseline values; B2, post-drug baseline values. Data are reported as means ± SEM for 7 rats. +P<0.05 for B2 compared to B1 and *P<0.01 compared to preceding baseline value, B1 (ANOVA).