Fig. 3.

Representative examples of preoperative and postoperative colonic motor activity from two further patients (A and B). Preoperative colonic motility was relatively quiescent (data shown 3–4 h before surgery). By contrast, postoperative motility (data shown 8–10 h after surgery) was characterized by a continuous hyperactivity of cyclic motor patterns occurring at a frequency near to 3 c.p.m.