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Posterior cortical atrophy. 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 ...
Early-onset Alzheimer's disease. Early-onset Alzheimer's disease (EOAD), also called younger-onset Alzheimer's disease (YOAD), [1] is Alzheimer's disease diagnosed before the age of 65. [2] It is an uncommon form of Alzheimer's, accounting for only 5–10% of all Alzheimer's cases. About 60% have a positive family history of Alzheimer's and 13% ...
Older children and adults with atypical neurology (e.g., people with cerebral palsy) may retain these reflexes and primitive reflexes may reappear in adults. Reappearance may be attributed to certain neurological conditions including dementia (especially in a rare set of diseases called frontotemporal degenerations), traumatic lesions , and ...
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]
Pediatrics. Periventricular leukomalacia (PVL) is a form of white-matter brain injury, characterized by the necrosis (more often coagulation) of white matter near the lateral ventricles. [1][2] It can affect newborns and (less commonly) fetuses; premature infants are at the greatest risk of neonatal encephalopathy which may lead to this condition.
Dementia praecox (meaning a "premature dementia" or "precocious madness") is a disused psychiatric diagnosis that originally designated a chronic, deteriorating psychotic disorder characterized by rapid cognitive disintegration, usually beginning in the late teens or early adulthood. Over the years, the term dementia praecox was gradually ...
Prognosis. Variable; average survival 4 years from diagnosis [8] Frequency. About 0.4% of persons older than 65 [9] Dementia with Lewy bodies (DLB) is a type of dementia characterized by changes in sleep, behavior, cognition, movement, and regulation of automatic bodily functions. Memory loss is not always an early symptom.
A diagnosis for cerebellar degeneration is regarded after any of the aforementioned signs and symptoms surface. For genetically classified forms of cerebellar degeneration, genetic testing can be carried out in order to confirm or deny the diagnosis, where this form of testing is only possible if the gene responsible for the cause of the ...