We investigated swallowing functions in the patients with abnormal sensation in the throat. Fluoroscopic examination was done on 234 patients, and measurement of swallowing pressure on 41 patients. Fluoroscopic examination revealed marked barium coating of the pharyngeal mucosa, which indicates a hypotonic condition. In measurement of swallowing pressure, a spike-like wave at the hypopharyngeal region or a continuous high pressure wave at the upper esophageal region was often observed. Abnormal

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... elevation of the swallowing pressure at the hypopharyngeal of esophageal region was observed in 40% of the patients. These results indicated that one of the causes of this disease is a subclinical functional or organic swallowing disorder.