New Study Finds 'Silent Strokes' Linked
to Memory Loss in Elderly.
New
research in the journal Neurology suggests that
in some cases, memory loss among the elderly may be due
to so-called "silent
strokes,".
Such strokes, which may not cause any
noticeable symptoms, result in small pockets of dead
brain cells, and are found in roughly 25 percent of older
adults, researchers reported.
Study authors are excited with their
findings, citing that the new aspect of this study of
memory loss in the elderly is that it examines silent
strokes and [brain] shrinkage simultaneously. Their
conclusions are based on studies of over 650 men and
women over the age of 65, none of whom had a history of
dementia.
All
the participants underwent MRI brain scans, as well as
testing to gauge their capacities in terms of memory,
language skills, thinking speed and visual
perception.
The
brain scans revealed that 174 of the participants had
experienced silent strokes, and the investigators found
that these seniors did not perform as well on the memory
exams. This finding held regardless of whether the part
of the patient's brain responsible for memory (the
hippocampus) was found to be relatively small or
not.
The
author of the study believe that since conditions like
Alzheimer's disease are defined mainly by memory
problems, their results may lead to further insight into
what causes symptoms and the development of new
interventions for prevention. So, suspicion is that
these events may be precursors to Alzheimer’s.
And
as their was association between the silent strokes and
volume of the hippocampus with apparent relation to
memory loss separately, they feel that preventing stroke
should also stave off memory problem development.
SOURCE:
American Academy of Neurology, news release,
Dec. 28, 2011
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