There are two sphincters in the oesophagus. They are normally contracted and they relax when one swallows so that food can pass through them going to the stomach. They then squeeze closed again to prevent regurgitation of the stomach contents and prevent air from entering the digestive system. If this normal contraction becomes a<unk> , these symptoms begin.
Cricopharyngeal spasm
Muscle tension dysphonia
Oropharyngeal dysphagia
Oedema glottidis
Laryngopharyngeal reflux
Laryngospasm
Odynophagia
Hemifacial spasm