Fig. 6

The slopes of the stimulus–response curves of ΔAoNA at the raising phase of blood pressure are compared between the spontaneous motor activity and pharmacologically evoked pressor interventions without (A) and with (B) the restraint HR at the lower intrinsic frequency. The slopes of the stimulus–response curves of ΔCsNA at the raising phase of blood pressure are compared between the spontaneous motor activity and pharmacologically evoked pressor interventions without (C) and with (D) the restraint HR at the lower intrinsic frequency. The slopes of the stimulus–responses curves at the raising phase of blood pressure, which were calculated with a linear regression method in individual cats, were compared between the two pressor interventions with or without the HR restraint. *Significant differences (P < 0.05) by a paired t test between the spontaneous motor activity and pharmacologically evoked pressor interventions. ^†Significant differences (P < 0.05) by an unpaired t test between the absence and presence of the HR restraint. NS not significantly different (P > 0.05)