Fig. 10.

In a Kölliker-Fuse implanted animal (different goat from Fig. 9), the attenuation in V̇i was due to chronic effects of atropine, as opposed to acting acutely. Note that during the third phase of the hypoxic ventilatory response, the acute Atr MD (purple triangles) and postimplant (blue triangles) series were closely aligned, whereas the post-Atr MD (red squares) series was attenuated relative to the 2 aforementioned series. Each series is an average of 2 studies, with data shown in 60-s bins.