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.
Dysphagia Causes. Dysphagia can result from abnormalities in any of the complex steps necessary for swallowing. The process of swallowing has three stages. 1  The first stage of swallowing begins in the mouth, where the tongue helps move the food around inside the mouth so that it can be chewed and softened with saliva.