Baseline respiratory frequency, tidal volume, and fiber activity of vagal lung C-fibers before and immediately after inhalation of aerosolized PBS or 0.05% H2O2 in anesthetized rats.

Respiratory frequency (f) and tidal volume (VT) were measured using spontaneously breathing rats. Fiber activity was measured using ventilator-assisted rats. Baseline values were averaged over 10 breaths or a 10-s period before and after inhalation. Data in each group are the mean ± SE.* pvs. before.