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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 ]
Childhood dementia is an umbrella group of rare, mostly untreatable neurodegenerative disorders that show symptoms before the age of 18. These conditions cause progressive deterioration of the brain and the loss of previously acquired skills such as talking, walking, and playing.
The life expectancy range is between eight and 10 years. Vascular dementia. People with vascular dementia face additional risk factors like stroke or heart attack, and the average life span is ...
Visual adaptation is the temporary change in sensitivity or perception when exposed to a new or intense stimulus, and the lingering afterimage that may result when the stimulus is removed. These continuous small adjustments reflect the neural coding process of the visual system, and exist so the brain can attempt to "normalize" the visual ...
Juvenile Huntington's disease has a life expectancy rate of 10 years after onset of visible symptoms. Most life-threatening complications result from muscle coordination, and to a lesser extent, behavioral changes induced by declining cognitive function. The largest risk is pneumonia, which causes death in one third of those with HD.
Facial onset sensory and motor neuronopathy, often abbreviated FOSMN, is a rare disorder of the nervous system in which sensory and motor nerves of the face and limbs progressively degenerate over a period of months to years. This degenerative process, the cause of which is unknown, eventually results in sensory and motor symptoms — the ...
The initial symptoms in two-thirds of cases are loss of balance, lunging forward when mobilizing, fast walking, bumping into objects or people, and falls. [3] [citation needed] Dementia symptoms are also initially seen in about one in five cases. [4] Other common early symptoms are changes in personality, general slowing of movement, and visual ...
Life expectancy for type A is approximately 10 to 20 years. These symptoms are seen in CS type 1 children. Cockayne syndrome type B (CSB), also known as "cerebro-oculo-facio-skeletal (COFS) syndrome" (or "Pena-Shokeir syndrome type B"), is the most severe subtype. Symptoms are present at birth and normal brain development stops after birth.