Baseline and Meal Activity
Baseline activity was low but not abnormal (37). In response to the meal, 3 SPWs occurred signifying a gastro-colonic reflex response which is a vagally-mediated awakening of the colon (1) (28) (37). In our study on HAPWs in healthy volunteers, 11% responded to a meal with only SPWs whereas 63% developed HAPWs, hence the response to the meal in this subject was low but not abnormal.