Fig. 5.
The mean SRFs of SL-A and SL-S spinal neurons from pH 4.0 saline injected rats before and after CGS-19755 (30 μmol, i.v.). The spontaneous firing of each neuron was subtracted from the firing frequency during distension to determine the actual response. CGS-19755 had no effect on the response to CRD of SL-A spinal neurons (A). The response of SL-S neurons to CRD was significantly decreased by CGS-19755 at pressures >20 mmHg (P<0.05) (B).