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.
Oropharyngeal dysphagia can result from abnormal functioning of the nerves and muscles of the mouth, pharynx (back of the throat) and upper esophageal sphincter (muscle at the top end of the swallowing tube). Diseases that involve the swallowing tube (esophagus) can cause esophageal dysphagia.