Figure 2.

Maximum changes (∆) of systolic blood pressure (∆SBP, A), mean arterial pressure (∆MAP, B), and heart rate (∆HR, C) following saline, L-Glu, GYK+ L-Glu, and MK-801+ L-Glu microinjection in the lPAG column in normotensive rats

Data are expressed as mean ± SEM. n = 6. One-way ANOVA and post hoc Tukey's test were used to analyze the changes. ***P<0.001, **P<0.01, *P<0.05 compared to the Saline group

## P<0.01 compared to the L-Glu group. GYK: 1-(4-aminophenyl)-4-methyl-7,8-methylenedioxy-5H-2,3-benzodiazepine , lPAG : Lateral periaqueductal gray matter , L-Glu; L-Glutamate