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 may be caused by traumatic injuries to the head, neck, or chest and result from accidents or iatrogenic causes. In the latter category, both planned and inadvertent injuries to cranial nerves are common. Many accident victims have involvement of multiple sites.
Poor nutrition and dehydration, common among the elderly, can cause this reaction. When elderly people have had swallowing problems in the past, they often are embarrassed to eat in public, which can cause a bout of dysphagia due to the stress of the situation.