186. Should only « Structural Dysphagia » be included in the group of primary motor disorders ?
A. Duranceau, C. Deschamps, E. Lafontaine (Montreal)

187. Is its origin related to disruption of the fixed sequences of contraction of the pharyngeal and parapharyngeal muscles ?
J. Christensen (Iowa City)

188. Is the mitochondrial origin of oropharyngeal dysphagia proven ?
K. Geboes J. Mebis (Leuven)

189. What are the clinical features of oropharyngeal dysphagia ?
Ph. Ducrotte (Rouen)

190. How frequently are Zenker's diverticula associated with oropharyngeal dysphagia ? and What is the frequency of associated weak esophageal contractions ?
A. Duranceau, C. Deschamps, E. Lafontaine (Montreal)

191. Is fiberoscopy of the pharynx easy to interpret ?
J. Leymarios (Paris)

192. Fiberoscopy of the entry to the esophagus
W.H. Boyce (Tampa)

193. What is the value of scintigraphy in objective assessment of oropharyngeal emptying ?
M.K. Ferguson (Chicago)

194. How common is abnormal relaxation of the upper esophageal sphincter (UES) during radiographic examination ?
T. Lerut, W. Coosemans, E. Ponette, J. Coolen (Leuven)

195. Do patients with achalasia of the esophagus present associated manometric disturbances of the upper esophageal sphincter ?
A. Moraldi, C. Iascone, R. Area, M. Caporossi, P. Ginevri, M. Picchio (Rome)

196. What is to be expected from the new technics of electromanometry ?
G. Cargill (Paris)

197. What is the true value of cricopharyngeal myotomy ?
M. Starlinger (Tubingen)

198. Over what length should cricopharyngeal myotomy be performed ?
C.A. Hiebert (Portland)

199. What are the histologic findings ?
P. Gehanno, C. Guedon, J. Depondt, V.N. Koka (Paris)