Final answer:
It is true that the majority of people with dementia, including those with Alzheimer's disease, will have communication difficulties due to the impact on brain areas responsible for language, typically localized in the left cerebral hemisphere.
Step-by-step explanation:
The majority of people with dementia will indeed have communication difficulty. This is true. Dementia encompasses a variety of symptoms, including disruptive memory loss, confusion about time or place, and difficulty with planning and executing tasks.
One specific type of dementia is Alzheimer's disease, which is the most common cause of dementia in the elderly. Communication difficulties often arise as Alzheimer's disease progresses because it affects the brain areas responsible for language and expression.
In the context of language function, it is primarily localized in the left cerebral hemisphere for the majority of people.
Therefore, if a person shows a lack of understanding or an inability to respond to the question, "What is your name?", it is likely they are experiencing a form of aphasia related to the disruption of language areas in the left hemisphere.