A system, apparatus, and method for controlling a gastric band in response to the detection of eating in a subject. The system includes an inflatable/deflatable gastric hand, a monitoring unit that monitors electrical activity changes of the subjects lower esophageal sphincter, and a hydraulic system that moves fluid into and out of the gastric band in response to a signal from the monitoring unit about the electrical activity changes. The method includes moving fluid into and out of an inflatable/deflatable gastric band in response to changes in electrical activity of the subjects lower esophageal sphincter.