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. 2018 Mar 2;596(8):1373–1384. doi: 10.1113/JP275465

Figure 2. Carotid baroreflex control of mean arterial pressure (MAP) and heart rate (HR) during electrically evoked quadriceps contractions.

Figure 2

A and C, carotid baroreflex‐mediated response to neck pressure (NP) and neck suction (NS) for MAP (A) and HR (C) at rest and during exercise under control conditions (CTRL) and following lumbar intrathecal fentanyl (FENT) injection. For each condition, the three data points represent (from left to right) the response to NP (+40 mmHg), the operating point and the response to NS (−60 mmHg). B and D, quantification of the carotid baroreflex‐mediated response to NP and NS for MAP (B) and HR (D) expressed as a change from the operating point. Data are presented as mean ± SD. * P < 0.05 vs. Rest. †P < 0.05 vs. FENT.