Fig. 1.

Peak pressor and cardioaccelerator responses to static contraction in 9 rats whose hindlimbs were freely perfused (A) and in 9 other rats whose femoral arteries were ligated 72 h before the start of the experiment (B). Note that control represents the responses to contraction before tetrodotoxin (TTX, 1 μM) was applied to the pool surrounding the dorsal roots. Likewise, TTX represents the responses to contraction while TTX (1 μM) was applied to the pool surrounding the dorsal roots, and recovery represents the responses after TTX was removed from the dorsal roots. *The peak response was significantly greater than the corresponding baseline (P < 0.05). †The peak response was significantly less than its corresponding control value (P < 0.05). ‡The peak response was significantly greater than the peak response of the control condition in rats whose hindlimbs were freely perfused. MAP, mean arterial pressure; HR, heart rate.