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Short-Term Memory Loss May Be Best Predictor of Alzheimer's

Short-Term Memory Loss May Be Best Predictor of Alzheimer's

09/06/11

MONDAY, Sept. 5 (HealthDay News) -- Mild cognitive impairment -- marked by a loss in short-term memory in particular -- may be a stronger predictor of Alzheimer's disease than so-called "biomarkers," which include things such as changes in brain volume or levels of certain proteins in cerebrospinal fluid, a new study suggests.

Spanish researchers looked at 116 people with mild cognitive impairment (MCI) who developed Alzheimer's disease within two years, 204 patients with the condition who didn't develop Alzheimer's and 197 people with no cognitive problems.

Mild cognitive impairment is usually marked by difficulties with short-term memory, such as losing your train of thought repeatedly or having trouble remembering what you did yesterday. You may begin to demonstrate uncharacteristically poor judgment or have trouble finding your way around familiar places. Some people may also develop depression or anxiety, or show signs of unusual irritation, aggression or apathy.

People with MCI can generally recall events in the more distant past in detail, however, and are usually able to reason, solve problems and communicate well with others in spite of relatively minor memory loss. In addition, not all cases of MCI progress to Alzheimer's disease.

Cerebrospinal fluid samples were collected from the participants at the start of the study and at annual visits for two years. Blood samples gathered at the start of the study were analyzed for genes associated with Alzheimer's, and magnetic resonance imaging (MRI) was used to assess the participants' brain volume and cortical thickness.

The researchers found that two measures of delayed memory, along with the cortical thickness of the left middle temporal lobe in the brain, were associated with a higher risk of mild cognitive impairment developing into Alzheimer's.

Mild cognitive impairment at the start of the study was a stronger predictor of Alzheimer's than most biomarkers, the researchers concluded.

The study appears in the September issue of the Archives of General Psychiatry.

More information

The Alzheimer's Association has more about mild cognitive impairment.

Copyright © 2011 HealthDay. All rights reserved.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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