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The diagnostic criteria for depression in Alzheimer disease specify that it requires only 3 of the possible symptoms for major depressive disorder (MDD), rather than the 5 required to diagnose MDD itself, and the symptoms may fluctuate. Therefore, dAD often goes unrecognized within the spectrum of symptoms of Alzheimer's disease. [4]
Alzheimer's disease (AD) is a neurodegenerative disease that usually starts slowly and progressively worsens. [2] It is the cause of 60–70% of cases of dementia. [2] [15] The most common early symptom is difficulty in remembering recent events. [1]
Dementia, however, can present early in its disease course with depressive symptoms, meaning that this association could actually be reflecting that dementia causes late life depression. [23] Studies that have directly tried to determine whether depression is an independent risk factor for dementia have led to inconclusive results.
“That finding is not surprising to me, because there are early life, midlife and late-life risk factors for dementia. (For) Alzheimer’s disease, for example, pathology starts in the brain ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. Long-term brain disorders causing impaired memory, thinking and behavior This article is about the cognitive disorder. For other uses, see Dementia (disambiguation). "Senile" and "Demented" redirect here. For other uses, see Senile (disambiguation) and Demented (disambiguation). Medical ...
Other common causes of chronic organic brain syndrome sometimes listed are the various types of dementia, which result from permanent brain damage due to strokes, [7] Alzheimer's disease, or other damaging causes which are irreversible. Amnestic pertains to amnesia and is the impairment in ability to learn or recall new information, or recall ...
“Alzheimer’s disease has a long pre-symptomatic period; Alzheimer’s-related changes take place in the brain 10, 15, even 20 years before the onset of memory and thinking symptoms.
Although Alzheimer's disease accounts for the majority of cases of neurocognitive disorders, there are various medical conditions that affect mental functions such as memory, thinking, and the ability to reason, including frontotemporal degeneration, Huntington's disease, dementia with Lewy bodies, traumatic brain injury (TBI), Parkinson's ...
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