Figure 1. Phenotypic behaviours of inspiratory neurons located in the preBötC.

A, current-clamp recording showing early inspiratory activity that precedes the integrated XII nerve (∫XII) output in 9 mm[K⁺]_o, a hallmark property of rhythmogenic neurons. B, voltage-clamp recording from a holding potential of −100 mV illustrating the transient K⁺ currents evoked at depolarized membrane potentials. Inset, a different neuron showing transient K⁺ currents evoked from a holding potential of −60 mV. C, the same neuron as in A and B illustrating voltage-dependent delayed excitation where ΔI_app was 95 pA.