Figure 1.

Mechanical temporal summation of pain procedure described in the current study. Participants were first assessed for initial pain after receiving a single contact and verbally rating the intensity of the pain from the single contact on a scale ranging from 0 (“no pain”) to 100 (“the most intense pain imaginable”). Participants then received a series of 10 additional contacts at a rate of one contact per second at the same body site. Upon completing 10 contacts, participants rated the peak or greatest pain intensity experienced during the 10 contacts. This single and 10 contact procedures occurred twice on each anatomical site for both the 180 and 300 g monofilaments. Temporal summation at each site was first calculated by averaging the initial and peak pain responses across the 2 trials at each site then subtracting pain intensity ratings of the single contact from the peak pain intensity.