An instrument or recording device that measures and records the movements or activity of the stomach.
From gastro- (stomach) + -graph (Greek graphein, to write or record). This term emerged in the late 1800s as physicians developed early instruments to scientifically study stomach contractions and function.
Before ultrasound and endoscopy, a gastrograph was one of the first ways doctors could 'see' what the stomach was doing without cutting it open. By attaching sensors to the abdomen, they could trace squiggly lines that revealed the stomach's natural rhythm and identify problems.
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