FIG. 3. Changes in the size of convergent, cutaneous receptive fields to repetitive esophageal distention (1.25 mL, 30 sec) in the rat. The smaller solid areas represent the originally determined, cutaneous recep- tive field that expanded following 10 to 15 distentions given every 6 min. (From Euchner, Sengupta, Meller, and Gebhart, unpublished.) Click here to see the graphic at a different resolution