Search results
Results From The WOW.Com Content Network
In neurology, semantic dementia (SD), also known as semantic variant primary progressive aphasia (svPPA), is a progressive neurodegenerative disorder characterized by loss of semantic memory in both the verbal and non-verbal domains. However, the most common presenting symptoms are in the verbal domain (with loss of word meaning).
The term young onset dementia is becoming more widely used to avoid the potential confusion between early onset dementia and early stage dementia. This term is now used as presenile dementia which is a historical term of people diagnosed with dementia from a younger age of 51 years old. This is caused by an atypical arteriosclerosis of the brain.
FTD is traditionally difficult to diagnose owing to the diverse nature of the associated symptoms. Signs and symptoms are classified into three groups based on the affected functions of the frontal and temporal lobes: [8] These are behavioural variant frontotemporal dementia, semantic dementia, and progressive nonfluent aphasia. An overlap ...
The survey in 2019 added the option to report dementia, including Alzheimer's disease, to. Some 4% of U.S. adults aged 65 and older say they have been diagnosed with dementia, a rate that reached ...
Posterior cortical atrophy (PCA), also called Benson's syndrome, is a rare form of dementia which is considered a visual variant or an atypical variant of Alzheimer's disease (AD). [1] [2] [3] The disease causes atrophy of the posterior part of the cerebral cortex, resulting in the progressive disruption of complex visual processing. [4]
In subcortical dementia, there is targeted damage to regions lying under the cortex. The pathological process that result in subcortical dementia shows neuronal changes that involve primarily the thalamus , basal ganglia , and rostral brain-stem nuclei and mostly, some projections in the white matter from these regions to the cortex, with ...
Probably the best-known dementia screening test of this kind is the mini–mental state examination. A disadvantage of such tests is that they are affected by the person's level of education , familiarity with the dominant language and culture in their country, and level of intelligence before the onset of dementia.
Binswanger's disease is a type of subcortical vascular dementia caused by white matter atrophy to the brain. However, white matter atrophy alone is not sufficient for this disease; evidence of subcortical dementia is also necessary.