are made of different parts: electro, because it is related to electrical activity, gastro, Greek for stomach, entero or viscero, Greek for intestines, gram, a Greek root meaning "to write".

An electrogastrogram (EGG), electroviscerogram (EVG) or a gastroenterogram are similar in principle to an electrocardiogram (ECG) in that sensors on the skin detect electrical signals indicative of muscular activity within. Where the electrocardiogram detects muscular