HOME >> MEDICINE >> NEWS
Brains of elderly can compensate to remain sharp, study indicates

DURHAM, N.C. -- Elderly adults who perform as well as younger adults on certain cognitive tests appear to enlist the otherwise underused left half of the prefrontal cortex of their brain in order to maintain performance, Duke University neuroscientists have found. In contrast, elderly people who are not "high performers" on the tests resemble younger adults in showing a preferred usage of the right side of the prefrontal cortex.

The researchers said that, although their finding is basic, it raises the potential of using either training or drugs to enhance cognitive function in the elderly by increasing "recruitment" of the left prefrontal cortex.

The evidence for compensatory brain activity in the high-performing elderly was reported in the November 1, 2002, issue of NeuroImage, by a research team led by Roberto Cabeza of Duke's Center for Cognitive Neuroscience. Other co-authors are Nicole Anderson, Jill Locantore and Anthony McIntosh of the University of Toronto.

In their study, Cabeza and his colleagues sought to better understand a phenomenon seen in previous studies, in which older people tend to show a reduced "hemispheric asymmetry" in activity of the two sides of the prefrontal cortex with aging. The prefrontal cortex, the brain region just behind the forehead, is where higher-level cognitive processing takes place.

Past research has shown that in young people certain cognitive tasks are carried out by the right frontal cortex, but older people tend to lose that asymmetry of processing. They tend to show more bilateral activity of the two brain hemispheres during such tasks.

Neuroscientists have proposed two divergent theories to explain this change with age. According to the "dedifferentiation" theory, age-related reduction in asymmetry occurs because older adults become less able to recruit specialized neural mechanisms. In contrast, the "compensation" theory holds that the asymmetry reduction occurs largely because the elderly
'"/>

Contact: Dennis Meredith
dennis.meredith@duke.edu
919-681-8054
Duke University
7-Nov-2002


Page: 1 2 3

Related medicine news :

1. Brains of people with autism recall letters of the alphabet in brain areas dealing with shapes
2. Rutgers researcher: Brains in dyslexic children can be rewired to improve reading skills
3. Brains of those in certain professions shown to have more synapses
4. From Cow Brains To Surgical Scrubs: Selected Students Will Get A Close-Up Look At Neurosurgery At Brainworks
5. Carnegie Mellon, Pitt Team Show That Adult Brains Compensate For Damage To Language Systems After Stroke Occurs
6. Nonintrusive Imaging Technique Useful For Identifying Language Regions In Kids Brains
7. Not enough evidence that multivitamins prevent infections in the elderly
8. Drug therapy may be comparable to invasive cardiac procedures for elderly patients with heart attack
9. Use of potentially inappropriate medications among elderly common in some European countries
10. Neurobehavioral function during coma, stroke rehabilitation effective for elderly
11. Flu vaccination impact on elderly deaths may be over-estimated

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Brains elderly can compensate remain sharp study indicates

(Date:10/25/2014)... (PRWEB) October 25, 2014 Background: , ... Recovery (CCAR). He is a pioneer in the field of ... in Connecticut's state treatment system and when he retired, he ... him while in public service. , 1. ... critical decisions concerning them? , 2. Can the recovery ...
(Date:10/25/2014)... Homeowners that are wondering how they can tell ... more. Clean Crawls gives 5 signs of poor ... it comes to insulation in their recently released article. ... Clean Crawls, can cause problems throughout your entire home. ... deteriorated, become damp, or been infested with pests should ...
(Date:10/25/2014)... Reinberg HealthDay Reporter FRIDAY, ... common cold sores -- herpes simplex -- might increase the ... In fact, being a carrier of certain antibodies to ... researchers found. "The identification of a treatable cause ... breakthrough," said lead researcher Dr. Hugo Lovheim, an associate professor ...
(Date:10/25/2014)... Dotinga HealthDay Reporter FRIDAY, ... are developed that spot increased risks for certain cancers, one ... getting screened. But a new study suggests that, at ... who found out their genes doubled their risk of colon ... to get screened. "It didn,t make any difference, not ...
(Date:10/22/2014)... Medical Solutions , the ... to announce that our co-founder and CFO, Scott ... Staffing 100 for 2014. Anderson was also named ... people in the staffing industry,” in 2013.     , ... healthcare staffing company in the U.S., was named ...
Breaking Medicine News(10 mins):Health News:CCAR Accepting Nominations for the Bob Savage Recovery Advocate of the Year Award 2Health News:5 Signs Indicating That Insulation Needs Replacing as Told By Clean Crawls in Recent Article 2Health News:Studies Link Cold Sore Virus to Alzheimer's Risk 2Health News:Studies Link Cold Sore Virus to Alzheimer's Risk 3Health News:Knowing Genetic Risk for Cancer May Not Change Behavior 2Health News:Medical Solutions Co-Founder/CFO Scott Anderson Named to Staffing Industry Analysts’ 2014 Staffing 100 2Health News:Medical Solutions Co-Founder/CFO Scott Anderson Named to Staffing Industry Analysts’ 2014 Staffing 100 3
(Date:10/22/2014)... RPh, of Vernak Farms Pharmacy in Skaneateles, ... Roentsch Scholarship by the Professional Compounding Centers of America ... during PCCA,s International Seminar, held October 8-10, ... pharmacist and PCCA member who embodies the innovative and ... pharmacist in the compounding community. George ...
(Date:10/22/2014)... Calif. , Oct. 22, 2014  Paper ... products, has developed APLS ® Body Guard ... minimizes the spread of bacteria and virus while ... APLS Body Guard Bio features a rugged, external ... edges that create a leak-proof inner chamber that ...
(Date:10/22/2014)... , Oct. 22, 2014  CryoLife, Inc. (NYSE: ... tissue processing company focused on cardiac and vascular surgery, ... President and Chief Executive Officer, has been elected to ... Steven G. Anderson , Executive Chairman ... has proven to be an excellent leader who is ...
Breaking Medicine Technology:PCCA Awards Charlene Vernak, RPh, the George Roentsch Scholarship 2New, State-Of-The-Art Body Bag Minimizes The Spread Of Bacteria And Virus 2Pat Mackin Joins CryoLife Board of Directors 2Pat Mackin Joins CryoLife Board of Directors 3
Cached News: