Figure 4
From: Thermal nociceptive properties of trigeminal afferent neurons in rats
Examples of responses of individual C fiber and A-delta nociceptor units to long or short laser pulses. A. Response of a C fiber nociceptor, A1 - action potential shape; A2 - lack of response to short pulse; A3 - response to long pulse; B. Response of an A-delta nociceptor, B1 - action potential shape; B2 - response to short pulse; B3 - lack of response to long pulse.