Intrabdominal pressure and rate of firing of abdominal muscles motor units.
D000009:Abdominal Muscles / Q000294:innervation / Q000502:physiology*; D000328:Adult; D006801:Humans; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D009119:Muscle Contraction / Q000502:physiology*; D011312:Pressure; D012119:Respiration / Q000502:physiology*; D013270:Stomach