Navigation Links
Sharp as a Tack at 90: Here's Why
Date:8/17/2012

By Jenifer Goodwin
HealthDay Reporter

THURSDAY, Aug. 16 (HealthDay News) -- Elderly people who experience no decline in memory have certain brain characteristics that differ from their peers who show more typical age-related memory loss, new research reveals.

Scientists from Northwestern University's Cognitive Neurology and Alzheimer's Disease Center identified 12 people aged 80 and older who did as well or better on memory tests as people who were 20 to 30 years younger. Researchers dubbed them "SuperAgers."

MRI scans showed that the cortex of SuperAgers was thicker than a comparison group of people aged 80 and older. The cortex is the outer layer of the brain involved in memory, attention and other thinking abilities.

A thinning cortex suggests a loss of brain cells, or gray matter, explained senior study author Emily Rogalski, an assistant research professor at Northwestern.

Brain scans also showed that people in their 80s and 90s who exhibited more typical memory declines (though not the marked decline associated with Alzheimer's disease or other thinking impairments, researchers said) had a thinner cortex.

"The SuperAgers looked more like the middle-aged controls, despite being 20 to 30 years older," Rogalski said. "We didn't see any significant atrophy or brain cell loss."

The study is published in the current issue of the Journal of the International Neuropsychological Society.

Some degree of forgetfulness is a common complaint among the elderly, Rogalski said. "These complaints are so widespread that it's come to be thought of as a normal part of aging," she noted.

Many prior studies have shown that brain atrophy and loss of thinking abilities go hand in hand, said Dr. Russell Swerdlow, director of the Alzheimer's Disease Center at the University of Kansas.

This study is unique in that it starts with people with exceptionally good memories for their age, and then looks at what makes their brains different, he said.

He noted, however, that the study shows a correlation between good memories in later life and a thicker cortex and larger brain volume, but it doesn't show cause-and-effect. What is unknown is if retaining brain volume protects thinking abilities, or if maintaining thinking abilities protects brain volume.

"It could be that those whose brains are better 'built to last' structurally are probably those brains that are better built to last from a functional perspective, or that those who are exercising their brains may have less atrophy," he said.

At the same time, SuperAgers also had a larger cingulate cortex, another brain region also involved in attention and memory, than even the middle-aged participants. What's unknown is if SuperAgers were born with a more prominent cingulate cortex or if that region resisted atrophy in later life, according to the study.

With studies like this, one thing people want to know is what it takes to be among the SuperAgers. Unfortunately, there aren't yet any clear answers, Rogalski said.

"Genetics are likely to play a role. And, in general, a healthy lifestyle is supportive of good memory," Rogalski said. "But in our experience, some of our SuperAgers have been smoking a pack of cigarettes for the last 20 years. Others have never touched them. Some go to the gym three to five days a week. Others don't exercise. Some are still working and others have never worked. It seems there might be more than one route to being a SuperAger."

More information

The U.S. National Institutes of Health has more on the brain.

SOURCE: Emily Rogalski, assistant research professor, Cognitive Neurology and Alzheimer's Disease Center, Northwestern University, Chicago; Russell Swerdlow, M.D., professor, neurology, and director, Alzheimer's Disease Center, University of Kansas, Kansas City; 2012 Journal of the International Neuropsychological Society.


'/>"/>
Copyright©2012 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Sharp Spike Seen in Swine Flu Cases: CDC
2. Humanities mini-courses for doctors sharpen thinking and creativity
3. Sleep Can Sharpen Your Memory
4. Gout Flare-ups Rise Sharply With Certain Foods: Study
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Sharp as a Tack at 90: Here's Why
(Date:10/13/2017)... Calif. (PRWEB) , ... October 13, 2017 , ... Many ... dementia. However, many long-term care insurance companies have a waiver for care if the ... 90-day elimination period, when the family pays for care, is often waived, so the ...
(Date:10/13/2017)... NY (PRWEB) , ... October 13, 2017 , ... Ellevate ... people in business to advocate for action towards gender equality at their inaugural Summit ... from around the globe, and reached a social audience of over 3 million. To ...
(Date:10/13/2017)... Abilene, Texas (PRWEB) , ... October 13, 2017 , ... ... publication this week that explains one of the most popular and least understood books ... seems like cryptic and puzzling descriptions that have baffled scholars for centuries. Many have ...
(Date:10/13/2017)... ... October 13, 2017 , ... Coveros, a ... has been awarded a contract by the Center for Medicare and Medicaid Services ... accelerate the enterprise use of Agile methodologies in a consistent and high value ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... “America On ... Christian identity. “America On The Brink” is the creation of published author, William ... several great-grandchildren. As a WWII veteran, he spent thirty years in the Navy. ...
Breaking Medicine News(10 mins):
(Date:9/22/2017)... 2017 AVACEN Medical (AVACEN) announced that its ... helping those with the widespread pain associated with fibromyalgia ... in Essex, England commented, "I ... experiencing no sleep at all, tremendous pain, with every ... recommend [the AVACEN 100] enough, how this has and ...
(Date:9/18/2017)... KALAMAZOO, Mich. , Sept. 18, 2017 ... , and OptiMed Specialty Pharmacy of Kalamazoo, ... offer a strategic hub service that expedites and streamlines ... personal spirometer, Spiro PD 2.0, and wellness management services.  ... is a medical device used to measure lung function ...
(Date:9/12/2017)... Sept. 12, 2017   EcoVadis , the leading platform for environmental, ... first annual edition of its Global CSR Risk and Performance Index. The ... EcoVadis, based on Scorecard Ratings that analyzed nearly 800,000 data points across ... ... ...
Breaking Medicine Technology: