Function of longitudinal vs circular muscle fibers in esophageal peristalsis, deduced with mathematical modeling

Figure 2 Frozen time image of peristaltic transport of a liquid bolus through the esophagus, with corresponding spatial variation in intraluminal pressure. A: Fluoroscopic image and pressure distribution (relative to atmospheric) concurrent with interpolated high-resolution manometry data; B: Bolus shape and overlayed pressure distribution from a mathematical model computer simulation.