Figure 4.

Rate histograms for the responses to graded heat stimuli from a neuron located in the dorsal horn ipsilateral to the site of inflammation. The responses to graded heat stimuli of a neuron were tested before and 4 h after the induction of inflammation. (A) Rate histograms for a neuron in a LC/SC-intact rat. (B) Rate histograms for a neuron in a LC/SC-lesioned rat (Tsuruoka et al., 2003).