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. 2008 Jul 18;295(4):H1429–H1438. doi: 10.1152/ajpheart.01365.2007

Fig. 3.

Fig. 3.

Cardiovascular responses to graded activation of mechanically sensitive afferent fibers. A: passive stretch of hindlimb skeletal muscle at graded intensities elicited pressor responses that were positively correlated to tension development in both WKY and SHR rats (P < 0.01). B: the stretch-induced increases in MAP were significantly larger in SHR than in WKY rats beginning at intensity levels corresponding to 34–67% of maximal tension development. C: HR was also found to be positively correlated to tension development in each group of animals (P < 0.01). D: likewise, the stretch-induced increases in HR were significantly larger in hypertensive than in normotensive rats beginning at intensity levels corresponding to 34–67% of maximal tension development. In A and C, when regression analyses were applied, the slopes of the relationships were greater in SHR compared with WKY. All data points within a group were used to determine the correlation coefficient (r) and regression slope and averaged for presentation only. *P < 0.05 compared with WKY rats. †P < 0.05 compared with all preceding lower levels of tension development.