What Does All Memory Loss Have in Common?
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EmailNew research suggests old age is not the main culprit behind forgetfulness. It seems brain lesions associated with dementia are also responsible for mild memory loss in old age.
New research suggests that old age is not the main culprit behind forgetfulness. According to a study published in the September 15, 2010, online issue of Neurology, the medical journal of the American Academy of Neurology, the same brain lesions that are associated with dementia are responsible for mild memory loss in old age.
"It appears these brain lesions have a much greater impact on memory function in old age than we previously thought," said study author Robert S. Wilson, PhD, with Rush University Medical Center in Chicago. "Our results challenge the concept of normal memory aging and hint at the possibility that these lesions play a role in virtually all late-life memory loss."
For the study, 350 Catholic nuns, priests and brothers were given memory tests annually for up to 13 years. Tests included word list recall, naming, verbal, number and reading assessments. After death, the participant's brains were studied for lesions.
The study found that memory decline tended to be gradual until speeding up in the last four to five years of life. Tangles, Lewy bodies, and stroke were all related to gradual memory decline. Almost no gradual decline was seen in the absence of tangles. Both Lewy bodies and stroke approximately doubled the rate of gradual memory decline. Tangles and Lewy bodies were also related to rapid memory decline but explained only about one third of the effect.
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The study was supported by the National Institute on Aging.
The American Academy of Neurology, an association of more than 22,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as stroke, Alzheimer's disease, epilepsy, Parkinson's disease, and multiple sclerosis.
Source:
American Academy of Neurology (AAN)
Rush Alzheimer's Disease Center
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