By Jennifer Hay
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Extra info for Alzheimer's & Dementia: Questions You Have...Answers You Need
Q: Which terms are most commonly used today? A: Generally, experts refer to dementia by the name of the disease or disorder that is causing it. But generic terms, such as dementia, senile dementia and presenile dementia, are used when the underlying cause is not known or when the speaker is referring to dementia in general. Q: Speaking of dementia in general, what are its symptoms? A: Dementia symptoms are varied and depend to a great extent on the underlying disease or disorder causing them. Not all people with Alzheimer's disease experience hallucinations (sensual perceptions of things that don't exist), for example, while most people with Lewy body dementia, an illness that resembles Alzheimer's, do hallucinate.
Page 41 3 Causes of Irreversible Dementia Q: What are the causes of irreversible dementia? A: The most common cause is Alzheimer's disease, which may be responsible for up to 75 percent of all cases of true dementia. Vascular dementia, caused by problems with the blood vessels, is also a major cause. And a number of dementia cases are caused by a combination of Alzheimer's disease and vascular dementia, known as mixed dementia. While these three causes account for the vast majority of irreversible dementia cases, they are by no means alone.
A: The pressure being referred to in this instance is that of the cerebrospinal fluid (CSF), a fluid that flows through and protects the brain and spinal canal. Generally, this fluid filters through a membrane in the brain and is later reabsorbed by the spaces above the brain. Hydrocephalus, or ''water on the brain," occurs when there is an interference with the normal circulation of CSF that allows excess fluid to collect in the brain. In most cases, this excess fluid is under high pressure. In normal-pressure hydrocephalus, however, the fluid pressure is normal.
Alzheimer's & Dementia: Questions You Have...Answers You Need by Jennifer Hay