Swallowing Health Dictionary

The process by which food or liquid is conveyed from the mouth tothe stomach via the oesophagus. Once food has been chewed and mixed with saliva to form a bolus, the tongue pushes the bolus to the back of the mouth and the voluntary muscles in the palate push it into the throat. The rest of the swallowing process occurs by a series of reflexes. Entry of food into the throat causes the epiglottis to tilt down to seal the trachea and the soft palate to move back in order to close off the naval cavity. The throat muscles push the food into the oesophagus. Waves of contraction (peristalsis) along the oesophagus propel the food towards the stomach. swallowing difficulty A common symptom with various possible causes, including a foreign object in the throat; insufficient production of saliva (see mouth, dry); a disorder of the oesophagus such as oesophageal stricture; pressure on the oesophagus, for example from a goitre; a nervous system disorder such as myasthenia gravis or stroke; or a psychological problem such as globus hystericus.

Investigations of swallowing difficulty may include oesophagoscopy or barium swallow (see barium X-ray examinations).

Treatment depends on the cause.

(deglutition) n. the process by which food is transferred from the mouth to the oesophagus (gullet). Voluntary raising of the tongue forces food backwards towards the pharynx. This stimulates reflex actions in which the larynx is closed by the epiglottis and the nasal passages are closed by the soft palate, so that food does not enter the trachea (windpipe). Lastly, food moves down the oesophagus by *peristalsis and gravity.