Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Gastroparesis ?
    ### Response:
    Gastroparesis, also called delayed gastric emptying, is a disorder that slows or stops the movement of food from the stomach to the small intestine. Normally, the muscles of the stomach, which are controlled by the vagus nerve, contract to break up food and move it through the gastrointestinal (GI) tract.
    