Figure 7.

SP induces respiratory network activity in 3 mm extracellular K⁺. A, Recording of the population respiratory activity showing the transition from rhythmic respiratory activity in 8 mm K⁺ to the absence of rhythmic activity in 3 mm K⁺. B, Bath application of SP restores the rhythmic activity. C, Washout of SP with a 3 mm K⁺ containing aCSF brings the network back to a silent state. Time calibration bars apply to all recordings.