Pressure inversion point at the upper high pressure zone and its genesis.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004947:Esophagus / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry; D008875:Middle Aged; D010614:Pharynx / Q000502:physiology*; D011312:Pressure; D012119:Respiration