The effect of CGRP on the firing rates of POAH neurons. The percent change in firing rate in response to CGRP for each neuron is plotted as a function of thermosensitivity (impulses.s-1.°C-1). The dashed line indicates 0% change in firing rate. A regression fit to the data is indicated by the solid diagonal line (r = 0.14). Warm sensitive neurons (m ≥ 0.8 impulses.s-1.°C-1) all showed a significant decrease in firing rate in response to CGRP and are represented by triangles. Temperature insensitive neurons (m < 0.8 impulses.s-1.°C-1), either did not response to CGRP (squares) or increased their firing rates (circles).