Figure 3. Response to hypoxia in an expiratory neurone of a P0 mouse.

The phasic hyperpolarization in the expiratory PBC neurone (Control, upper panel), occurred prior to (arrow) and during integrated XII activity (I for inspiration). This phasic hyperpolarization was suppressed during hypoxia-induced augmentation (augmentation, second panel) and a phasic depolarization was seen during depression (upper traces, lower panel). Left panels show original recordings, right panels illustrate the averaged activity obtained from eighteen sweeps.