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New Alzheimer's Test Is Accurate
A new study in the Annals of Neurology suggests that a
spinal tap can detect a biomarker signaling Alzheimer's before any symptoms
appear. Today Alzheimer's is only positively confirmed after death.
The study was conducted by the University of Pennsylvania
School of Medicine. Researchers tested the spinal fluid of 300 people who were
in their 70s: 114 had normal memories, 200 had memory problems, and 102 had
The testing was found to be very accurate in predicting
Alzheimer's in individuals with failing memories.
The test would not change the outcome, but it would lead to
earlier treatments that may delay the onset. Spinal taps can be an
uncomfortable procedure, so this method likely will not be used as a routine
Alzheimer's may begin as much as a decade before symptoms.
Although genetics plays a role, Alzheimer's is closely related to vascular
decline. Proactive steps focus on maintaining healthy blood vessels with a good
diet, performing physical activity, and avoiding smoking.
Researchers also are working on new positron emission
tomography scans of the brain to detect the presence of amyloid plaques.
According to the National Institute on Aging, 2.4 to 5.1
million Americans may have Alzheimer's.