Fig. 4.

Intracellular activity of a type B ELM during coughing (C) and swallowing (SW). This neuron remained depolarized throughout the abdominal burst, without a repolarization (compare with stage C3 in Fig. 3). In both this and Figure 3, the onset of depolarization at the I–E transition preceded the abdominal burst slightly. The peak discharge frequencies of both neurons increased up to 100 Hz during coughing and swallowing. Data in this and Figure 3 were obtained from the same cat. Presumptive resting potential of this ELM was measured at the arrow.