High resolution impedance manometric findings in dysphagia of Huntington’s disease

Figure 2 High resolution impedance manometry findings using modified protocol. A: Patient; unremarkable peristaltic contraction and bolus transit between the hypopharynx and upper esophagus are seen after pull back of the catheter; B: Patient; irregular contractions are seen at the velopharyngeal zone, and simultaneous contraction between velopharyngeal and mesohypo- pharyngeal zone accompanying impaired bolus transit of pharyngo-upper esophageal segment after vocalizing “kakakaka”; C: Healthy subject without dysphagia; regular contractions are noted at the velopharyngeal zone, and peristaltic contractions of pharyngo-upper esophageal segment are normal as well as bolus transit after vocalizing “kakakaka”.