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Yet the proportion of older Americans with dementia actually declined from 13% in 2011 to 10% in 2019, according to the Population Reference Bureau. Plus, the symptoms you’re concerned about ...
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]
The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3] : 9. In humans, the pigmentation of the iris varies from light ...
The researchers hypothesized that this may be because the color of the prime is not relevant to the search task. To explore this, a follow-up experiment by the same researchers found people without aphantasia saw a greater reduction in reaction time when selecting the target from two images compared to from two words.
Here are 9 myths about aging that people need to stop believing. Depositphotos.com. 1. 'Old People Can’t Learn New Things'. People think aging means you can’t teach an old dog new tricks, but ...
Leqembi’s side effects and other potential issues. Leqembi offers doctors the first new Alzheimer’s treatment option in years. But it also has some possibly dangerous side effects. Those ...
Heterochromia iridum. Heterochromia is a variation in coloration most often used to describe color differences of the iris, but can also be applied to color variation of hair [1] or skin. Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment ). It may be inherited, or caused by genetic mosaicism ...
Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem or variation in the functionality of one or more of the three classes of cone ...
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