Fig. 4.
Mean data showing the effect of pyridoxal phosphate-6-azophenyl-2′,4′-disulfonic acid (PPADS), a P2X antagonist, on the baseline discharge (A) and the responses of group III afferents to either static contraction (B) or passive stretch (C) in Sham+Sed, Sham+ExT, CHF+Sed, and CHF+ExT rats. D: effect of PPADS on the tension time index (TTI) produced by passive stretch or static contraction in Sham+Sed, Sham+ExT, CHF+Sed, and CHF+ExT rats. Data are expressed as means ± SE. n = 8–10/each group. *P < 0.05 vs. before, #P < 0.05 vs. Sham+Sed.