Fig. 3.

Average integrated magnitude (RMS) of the CAP from low-threshold myelinated A- and Ah-type baroreceptor fibers as a function of stimulus intensity. A: the RMS of the CAP from A-type fibers in male and female rats was remarkably similar. B: in stark contrast, the RMS of the CAP from Ah-type fibers in female rats was significantly greater than those from male rat over all but the lowest stimulation intensities (<0.5 V). Double arrow highlights the range of suprathreshold activation, i.e., a CAP of constant magnitude and yet increasing stimulation intensity. Both populations of low-threshold A- and Ah-type fibers exhibited graded recruitment at only the lowest stimulus intensities (less than ∼0.5 V). Data are means ± SD. *P < 0.05, #P < 0.01.