Figure 2.

The raw data used to calculate temporal summation and conditioned pain modulation (presented in Fig. 1) of patients with PTTN and healthy control subjects are presented. Resulting sensations on a numerical pain scale of 0 to 20 in response to 26g of force stimulation were recorded after the first and then at the end of every 10 stimuli out of a train of 30 successive stimuli. The stimuli were applied intraorally to the affected (injured) and contralateral sites and to the dominant forearm of the subjects. The data were recorded with and without conditioning pain stimulus (panel A) and presented in patients suffering from the condition for more or less than a year (panel B).