Figure 10. Responses of a CMH unit to heating, cooling and menthol.

A–C, 3 portions of the recording from a polymodal nociceptor (F2a in Table 2) subjected to heating and cooling ramps and exposure to 30% menthol in ethanol for 15 min. In each portion, the fourth (bottom) part shows the temperature of the Peltier element, the third the number of spikes per sweep, with an arrow indicating the single sweep illustrated at the top. The second part shows a superimposition of all the spikes recorded in the particular portion of the record. Clear responses were only seen to heating and close to 0°C, which were not appreciably changed by exposure to menthol (see text).