Fig. 5.

From a cohort of ovariectomized (OVX) female rats, the sample population of VGN (n = 64) continued to reveal three distinct subpopulations of afferents with the distributions of the myelinated A-type and Ah-type and unmyelinated C-type afferent neurons being nearly identical to those from normal female rats (see Figs. 2–4). Waveform traces are from a representative myelinated Ah-type VGN following ovariectomy in response to step-depolarizing currents of 300 pA and 500 pA, respectively. Compare this reduced excitability with that of myelinated Ah-type neurons from normal female rats presented in Fig. 2B.