Fig. 5.
A: raster plot of a bursting neuron's response to 10 applications of a noxious mechanical stimulus to the hindpaw at time = 0 s. Spikes enclosed in boxes represent bursts of action potentials (as defined in methods). Inset: spike waveforms of a burst from this neuron. B: percentage of cells in spinal and sham-lesioned animals that showed bursting activity either spontaneously or in response to innocuous and noxious hindpaw stimuli. The number of cells that showed bursting activity in each category is shown above the bars. The percentage of cells that burst in response to noxious stimuli was significantly higher in CPS rats than control rats (P < 0.001, χ2 test).