Not detected Cerebrovascular accidents ( stroke ) appear to be one of the causes of the deficit of memory , according to a U.S. study. This provides an additional explanation to the decline of certain cognitive abilities. And perhaps in Alzheimer’s disease …
Written by Abdullah Abbadi/Blue Line News
Strokes are more common than we think. But mostly they show symptoms, affecting only a few neurons. They are called silent. Apparently they can occur from age 30 and one out of three is victimized each year from age 70. Taken individually, these strokes have little impact, but over time, the consequences can be noticed.
A study by researchers at Columbia University in New York (USA) and published in Neurology show their impact on memory.
Memory is a very complex process. One of its headquarters would be the brain hippocampus, a small structure included in the medial temporal lobe of the mammalian brain. This is where good numbers are stored with memories that can be expressed verbally (general knowledge, true stories in the past). Previous studies have argued that a small hippocampus was associated with cognitive decline.
A connection between cognitive ability and number of silent strokes
In this research, 658 healthy people aged 79 years on average were passed to MRI and were also subjected to tests of memory, language, speed of information processing and visual perception. Of these, 174 (26%) had silent strokes.
Those people were less efficient in the various intellectual tests, including those relating to memory, than their peers, regardless of the size of their hippocampus. This shows that the volume of the hippocampus is not the only data used to estimate the decline in cognitive abilities , but these cerebral infarcts do play a role.
The risk factors of stroke are the obesity accompanied by its share of cardiovascular disease , as well as the blood pressure or the cholesterol . The damage they cause, even on a small scale, are irreversible.
Adam Brickman, a co-author of the study, even believe that the implications of this discovery can go beyond the simple prevention of cognitive decline related to age naturally. ” I think we are at the beginning of a story [medical] in which [is considered] the disease contributes to cardiovascular symptoms of Alzheimer’s disease . “In any case in this direction that research will continue.
Selected Sources for further read:
ABC News published Dec 29,2011
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