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. 2003 Apr;52(4):471–478. doi: 10.1136/gut.52.4.471

Figure 4.

Figure 4

Volume dependency of (A) hypopharyngeal intrabolus pressure and (B) maximal sagittal UOS diameter. Note that the extent of sphincter opening is reduced in myositis. Myositis patients also demonstrated a bolus volume dependent increase in hypopharyngeal intrabolus pressure which was significantly greater than that seen in either healthy or neurogenic controls. UOS, upper oesophageal sphincter.