290. Spontaneous repetitive non-propagated contractions
S.B. Benjamin (Washington)

291. Shortened relaxation of the LES
D.O. Castell (Philadelphia)

292. The hypertensive LES has quite special features
R. W. McCallum (Charlottesville)

293. Scintigraphy usually provides little information in this syndrome
L. Engelholm, J. Abramovici, J. De Toeuf (Brussels)

294. Does the hypertensive lower esophageal sphincter correspond to vigorous achalasia ?
G. Vantrappen (Leuven)

295. How useful is the mecholyl test ?
D-O. Castell (Philadelphia)

296. What is the value of esophagomyotomy in patients with hypertensive lower esophageal sphincter ?
G.G. Jamieson (Adelaide)

297. Spasms localized to the lower part of the esophagus are a new entity
R. W. McCallum (Charlottesville)

298. May not many of these forms be associated with undiagnosed esophageal reflux ?
J. Bancewicz, M. Marples, T. O'Hanrahan (Manchester)

299. The esophageal signs may also be only one feature of a diffuse disorder of alimentary motility
R.E. Clouse (Washington)

300. May psychological and environmental stressors have an effect on peristaltic esophageal contractions ?
J.E. Richter (Birmingham)

301. May all of these syndromes have a common etiology ?
D.O. Castell (Philadelphia)

302. What is the value of scintigraphy for the quantitative assessment of esophageal function in non-specific motor disorders ?
M.K. Ferguson (Chicago)

303. What are the qualitative aspects of esophageal scintigraphy in non-specific motor disorders ?
M.K. Ferguson (Chicago)