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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Pain. 2009 Feb 23;143(1-2):65–70. doi: 10.1016/j.pain.2009.01.022

Fig. 1. Exacerbated temporal summation of the second pain in group 3 subjects.

Fig. 1

* P< 0.05, as compared with group 1 and group 2 subjects. S1/BL, S2/BL, S3/BL: the percent increase in VAS (visual analogue scale) score in response to the second, third, and fourth stimulation over that of the first stimulation in a train of four noxious heat (47 °C) stimuli.