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Signs and symptoms. Frontotemporal dementia is an early onset disorder that mostly occurs between the ages of 45 and 65, [13] but can begin earlier, and in 20–25% of cases onset is later. [11][14] Men and women appear to be equally affected. [15] It is the most common early presenting dementia. [16]
Semantic dementia. 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 ...
As aphasia's and other language disorders are frequently due to stroke, their symptoms can change and evolve over time, or simply disappear. If the cause is a stroke, people can make a good recovery but may have persistent deficits. [16] This is because the healing in the brain after inflammation or hemorrhage, leads to decreased local ...
In aphasia (sometimes called dysphasia), [ a ] a person may be unable to comprehend or unable to formulate language because of damage to specific brain regions. [ 2 ] The major causes are stroke and head trauma; prevalence is hard to determine, but aphasia due to stroke is estimated to be 0.1–0.4% in the Global North. [ 3 ]
The signs and symptoms of dementia are termed as the neuropsychiatric symptoms—also known as the behavioral and psychological symptoms—of dementia. [21] [22] The behavioral symptoms can include agitation, restlessness, inappropriate behavior, sexual disinhibition, and verbal or physical aggression. [23]
Logopenic progressive aphasia (LPA) is a variant of primary progressive aphasia. [1] It is defined clinically by impairments in naming and sentence repetition. [2] It is similar to conduction aphasia and is associated with atrophy to the left posterior temporal cortex and inferior parietal lobule. It is suspected that an atypical form of ...
Transcortical motor aphasia (TMoA), also known as commissural dysphasia or white matter dysphasia, results from damage in the anterior superior frontal lobe of the language-dominant hemisphere. This damage is typically due to cerebrovascular accident (CVA). TMoA is generally characterized by reduced speech output, which is a result of ...
In neuropathy, primary progressive aphasia (PPA) [1] is a type of neurological syndrome in which language capabilities slowly and progressively become impaired. As with other types of aphasia, the symptoms that accompany PPA depend on what parts of the brain 's left hemisphere are significantly damaged. However, unlike most other aphasias, PPA ...