Meditation May Sharpen Memory
The study focused on 25 older adults deemed to have mild cognitive impairment -- problems with memory and thinking that may, in some cases, progress to dementia.
Researchers randomly assigned them to either 12 weeks of meditation and other yoga practices, or 12 weeks of memory enhancement training -- which taught strategies for improving forgetfulness.
In the end, the study found, both groups did a little better on tests of verbal memory -- the kind involved in remembering names or lists of words, for example. But the meditation group showed a bigger change, on average, in tests of visual-spatial memory -- which is needed for navigating while walking or driving, or trying to recall a location.
The meditators also showed fewer symptoms of depression and anxiety.
To Dr. Helen Lavretsky, the senior researcher on the study, that is a key finding.
"The benefits of yoga and meditation are diverse," said Lavretsky, a professor-in-residence in the psychiatry department at the University of California, Los Angeles.
There are several reasons the practices might help seniors with memory issues, Lavretsky said.
One way is by easing their anxiety about those problems. But, there may also be more-direct effects on "brain fitness," she explained.
Her team found evidence of that in specialized MRI scans that charted study participants' brain activity. In both groups, changes were seen in the "connectivity" of certain brain networks involved in memory.
The findings, published May 10 in the Journal of Alzheimer's Disease, are based on this small group of older adults followed for a limited time.
So it's hard to draw firm conclusions, said Mary Sano, director of the Alzheimer's Disease Research Center at the Mount Sinai Icahn School of Medicine, in New York City.
For one, she said, older adults with mild cognitive impairment are an "amorphous group." It can include people with temporary memory issues, or anxiety over memory lapses that are not pathological.
By Amy Norton
HealthDay Reporter