The ability of move spontaneously, however in the case of esophageal motility, there are many factors (ie nerves, hormones, and mechanical distention) involved in inciting the esophagus to move The coordination and strength of esophageal motility is important to transport food to the stomach and to clear refluxed acid from the stomach
a change of position that does not entail a change of location; "the reflex motion of his eyebrows revealed his surprise"; "movement is a sign of life"; "an impatient move of his hand"; "gastrointestinal motility"
The ability to move spontaneously In regards to AGB, it means the ability of the esophagus to push food from the upper pouch through the stoma and into the lower stomach