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. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: Pain. 2009 Jun 21;145(1-2):96–104. doi: 10.1016/j.pain.2009.05.020

Figure 2.

Figure 2

Pressure pain (Panel A) and heat pain sensitivity (Panel B) of NC and FM subjects. All participants underwent prolonged sensitivity adjusted tonic pressure stimulation at the TrapM and 10 sec sensitivity adjusted heat stimulation at the forearm Average tonic pressure used to achieve shoulder pain ratings of 4.0 ± 0.5 VAS units was 2.3 kg for NC (n =16) and 1.1 kg for FM participants (n = 21) (p < .001) (Panel A). To achieve similar intensity levels of heat pain ratings at the forearm, stimulus temperatures of 48.7 °C and 47.4 °C were needed for NC (n = 22) and FM subjects (n = 28), respectively (p < .001) (Panel B). Open circles = NC-Placebo; open diamonds = NC-Lidocaine; filled circles = FM-Placebo; filled diamonds = FM-Lidocaine