Figure 4.

(A) Adjusted average TS-size change scores for each trial for older and younger adults. Adjustments were made for thermode temperature and TS-intensity change scores. (B) Adjusted average size of pain aftersensations for each trial for older and younger adults. Adjustments were made for thermode temperature, intensity of pain aftersensation ratings, and the size rating of the tenth pulse.

Notes: *Significantly different at P<0.05. Younger adult group age range: 18–27 years. Older adult group age range: 56–77 years.

Abbreviations: IPI, interpulse interval; TS, temporal summation.