In a definition essay, you explain the meaning of a certain term by giving a detailed description of it, and support your definition with clear examples or facts. Such explanations are needed if a term is special, abstract, disputed or does not have a common meaning.
Dysphagia has many possible causes and happens most frequently in older adults. Any condition that weakens or damages the muscles and nerves used for swallowing may cause dysphagia. For example, people with diseases of the nervous system, such as cerebral palsy or Parkinsonâs disease, often have problems swallowing.
Functional dysphagia. Achalasia of the lower esophageal sphincter: it is a lack of relaxation of the lower esophageal sphincter causing dilation of the esophagus upstream (which accumulate food that can not enter the stomach) hence the term âmega-esophagus.â Its cause is unknown.