Fig. 8.
Examples of inspiratory augmenting neurons labeled with biotinamide. A, B, Biotinamide-filled I-AUG neuron (A,arrow) with fast discharge rate and fast axonal conduction velocity that lacks NK1R-immunoreactivity (B,arrow). Note presence of NK1R immunoreactivity in an adjacent cell (B, arrowhead).C, D, Biotinamide-labeled I-AUG neuron (C) with low discharge rate and slow axonal conduction velocity that contained NK1R-immunoreactivity (D). Scale bar, 25 μm.