title: Acoustically evoked esophageal contractions and defense reaction.
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D003674:Defense Mechanisms; D004947:Esophagus / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000502:physiology; D009949:Orientation; D012018:Reflex; D013216:Reflex, Startle