“…When present, it is evident mainly from EMD, which are found in 20% of patients [3,4,12,18,50,51], Clinically, patients suffer from a swallowing dysfunction accompanied now and then by tracheal overflow and nasal regurgitation of liquid [12], These degluti tive disorders are observed in cineradiog raphy by a barium reflux in the pharynx, a tracheal flooding by the contrast agent and a delay in pharyngeal emptying [12], Pharyn goesophageal manometric data confirm the damage to the striated musculature, as shown by a decrease in the amplitude of pha ryngeal contractions and in the pressure of the upper esophageal sphincter and also by an alteration in the peristalsis of the proxi mal esophagus [12]. Abnormalities of pha ryngoesophageal motility are observed in 20% of patients, independently of age, dura tion of the illness and presence of an RP.…”