The Authors report their experience in the study of oesophageal motor abnormalities in patients with gastroesophageal reflux disease. By an electromanometric test in 50 subjects (20 healthy volunteers and 30 patients with oesophagitis), they evaluated the results concluding that: 1) LES low pressure is correlated significantly with oesophagitis; 2) oesophageal peristaltic dysfunction could be the effect of oesophagitis rather than its cause.