Figure 4.

Neurons with dominating somatic inputs. Recordings from a projection neuron receiving suprathreshold somatic but no visceral input. Somatic excitatory postsynaptic potentials and excitatory postsynaptic currents are C-fiber-mediated. The monosynaptic excitatory postsynaptic current is indicated by an arrowhead. For the intercostal nerve, 5 consecutive traces are shown superimposed in current and voltage-clamp (holding potential, −70 mV). Intrinsic firing properties are shown for the injected currents of +80, +30, and −10 pA.