Prevalence and Incidence of Amnesia

Amnesia Prevalence: Book Excerpts

• Causes and incidence - Alzheimer's disease

Prevalence/Incidence of Amnesia: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the prevalence and/or incidence of Amnesia.

Alzheimer's disease: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

The cause of Alzheimer’s disease is unknown; however, several factors are thought to be implicated in this disease. These include neurochemical factors, such as deficiencies in the neurotransmitter acetylcholine, somatostatin, substance P, and norepinephrine; environmental factors; and genetic immunologic factors. Genetic studies show that an autosomal dominant form of Alzheimer’s disease is associated with early onset and early death, accounting for about 100,000 deaths a year. A family history of Alzheimer’s disease and the presence of Down syndrome are two established risk factors.Alzheimer’s disease isn’t exclusive to the elder population; its onset begins in middle age in 1% to 10% of cases

The brain tissue of patients with Alzhei-mer’s disease has three hallmark features: neurofibrillary tangles, neuritic plaques, and granulovascular degeneration. Examination of the brain after death also finds that it’s atrophic, commonly weighing less than 1,000 g, compared with a normal brain weight of about 1,380 g.

About 360,000new cases of Alzheimer’s are diagnosed each year.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

About prevalence and incidence statistics:

The term 'prevalence' of Amnesia usually refers to the estimated population of people who are managing Amnesia at any given time. The term 'incidence' of Amnesia refers to the annual diagnosis rate, or the number of new cases of Amnesia diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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