it is characterized by an increased tonus of the oesophagus inlet musculature , a conspicuously non-irritant oesophageal mucosa , the absence or only a slightly indicated and irregular course of the expansion peristalsis , a poor distinction of the respiratory luman variations and the occurrence of circumscribed spasms and , above them , of segmental relaxation bulging .
C0014876
oesophagus
C0227176
oesophageal mucosa