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It is one of the most common causes of disability among the elderly but can develop before the age of 65 when it is known as early-onset dementia or presenile dementia. [ 273 ] [ 274 ] Less than 1% of those with Alzheimer's have gene mutations that cause a much earlier development of the disease, around the age of 45, known as early-onset ...
Research shows that infections and exposure to toxins such as HIV [67] and streptococcus cause dementia. [68] This HIV infection that makes its way to the brain is called encephalopathy which spreads itself through the brain leading to dementia. [67] The infections or toxins that trigger a change in the brain chemistry can develop into a mental ...
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]
The weaker signals from subthalamic nuclei thus cause reduced initiation and modulation of movement, resulting in the characteristic movements of the disorder, notably chorea. [34] Huntington's disease presents itself later in life even though the proteins that cause the disease works towards manifestation from their early stages in the humans ...
The main causes are neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and Huntington's disease because they affect or deteriorate brain functions. [7] Other diseases and conditions that cause NCDs include vascular dementia , frontotemporal degeneration , Lewy body disease , prion disease , normal pressure ...
The disease has many complications, including anxiety, dementia, and depression. [29] Parkinson's disease typically occurs in people over the age of 60, of whom about one percent are affected. [30] [31] The prevalence of Parkinson's disease dementia also increases with age, and to a lesser degree, duration of the disease. [32]
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