What stages in swallowing can disorders occur?

Swallowing problems: There are numerous swallowing disorders that relate to the rigidity of the esophagus ( too lax is called achalasia with ectasis or too rigid due to scar or radiation or injury) and then there are a series of motility disorders most commonly seen with a stroke in which coordination of the movement make it difficult for food to pass from the mouth to the stomach.

Every: Swallowing dysfunction can occur at stage of swallow.

Dysphagia: "transfer dysphagia" is a problem moving the food bolus from your mouth to the top of the esophagus; "transit dysphagia" is a problem transiting the food down the esophagus. Motility studies (modified barium swallow with speech therapist; esophageal manometry) may be helpful in identifying the point of pathology, if present. Sometimes, just esophageal spasms can make swallowing feel problematic.