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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 ...
The International Classification of Diseases, Clinical Modification (ICD-9-CM) was an adaptation created by the US National Center for Health Statistics (NCHS) and used in assigning diagnostic and procedure codes associated with inpatient, outpatient, and physician office utilization in the United States. The ICD-9-CM is based on the ICD-9 but ...
Binswanger's disease, also known as subcortical leukoencephalopathy and subcortical arteriosclerotic encephalopathy, [1] is a form of small-vessel vascular dementia caused by damage to the white brain matter. [2] White matter atrophy can be caused by many circumstances including chronic hypertension as well as old age. [3]
Research into ME/CFS seeks to find a better understanding of the disease's causes, biomarkers to aid in diagnosis, and treatments to relieve symptoms. [1]: 10 The emergence of long COVID has sparked increased interest in ME/CFS, as the two conditions may share pathology and a treatment for one may treat the other. [22] [14]
Alzheimer's disease ( AD) is a neurodegenerative disease that usually starts slowly and progressively worsens, [ 2] and is the cause of 60–70% of cases of dementia. [ 2][ 15] The most common early symptom is difficulty in remembering recent events. [ 1] As the disease advances, symptoms can include problems with language, disorientation ...
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]
Aging is associated with blood flow changes in the brain. These changes may be linked to an increased risk of neurodegenerative conditions. A new mouse study maps how these changes vary throughout ...
Vascular dementia is dementia caused by a series of strokes. [2] [4] Restricted blood flow due to strokes reduces oxygen and glucose delivery to the brain, causing cell injury and neurological deficits in the affected region. [6] Subtypes of vascular dementia include subcortical vascular dementia, multi-infarct dementia, stroke-related dementia ...