Fig. 3. Examples of low-threshold and high-threshold receptive fields (RFs) of a wide-dynamic-range (WDR) neuron before and 2 h after the incision had been made (  A ). Mean changes in low-threshold (  B ) and high-threshold RF sizes of WDR neurons (  C ). The low-threshold and high-threshold RF sizes significantly increased after the incision had been made. *  P < 0.01  versus preincision values.