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New research ... Scientists identify 4 types of "Alzheimer's" disease


The "Sense Alert" scientific website published a new research conducted by scientists from several countries, through which they were able to identify 4 types of Alzheimer's disease.


The research began by saying that "the more we understand Alzheimer's disease, the faster we find better treatments, and discovering 4 types of this disease that affects the brain is important."


The research was done using "machine learning algorithms" trained on brain scans, and 1,143 people were observed, either with healthy brains or brains affected by Alzheimer's disease, and scientists identified 4 different ways in which "tau proteins" are intertwined between neurons.


The tau proteins are closely related to the development of Alzheimer's disease, and it was believed that the way these proteins were crossed in the brain was "somewhat similar" in people with the disease.


According to Al-Hurra, neurologist Oscar Hanson of Lund University in Sweden says, "We have identified four distinct patterns of tau proteins, which have become distinct over time."


Hanson explained, "There is a variation in the prevalence of proteins between 18 and 30%, which means that these variants of Alzheimer's disease are in fact very common, and none of them dominates as we previously thought."


In the first type, which was discovered in 33% of cases, it was found that it affects the memory of patients, and in the second type, which was recorded in 18%, it spreads through other parts of the cerebral cortex, which means that memory problems are less, but the difficulties in planning and implementing procedures are more. .


In the third type, found in 30%, tau diffuses in the visual cortex, and patients have difficulty directing themselves, determining distance and shapes, and in the fourth type, present in 19% of cases, it spreads asymmetrically in the left hemisphere and affects speech.


These discoveries were made possible by "detailed scans" and 3D tomography, as well as through the analysis and follow-up of patients over a period of two years.

This discovery helps explain the different causes of symptoms in people as the disease progresses.

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