Chapter 7 figure 5. Effects of repeated colonic distention (60 mm Hg, 30 sec every 4 minutes) on areas of subject drawn referred sensation (left) and visual analog scale (VAS) (right) during the 1st and 10th colon distention. The areas of referred sensation significantly increase in size following the 10th colonic distention (modified from ref 38).Click here to see the graphic at a different resolution