Navigation Links
When it comes to intelligence, size matters

This release is available in French.

A collaborative study led by researchers at the Montreal Neurological Institute (MNI), McGill University has demonstrated a positive link between cognitive ability and cortical thickness in the brains of healthy 6 to 18 year olds. The correlation is evident in regions that integrate information from different parts of the brain. The imaging study published this week in a special issue of scientific journal Intelligence is the largest and most comprehensive of its kind with a representative sample of healthy children and adolescents.

This study stems from the NIH MRI Study of Normal Brain Development, for which the MNI was the data coordinating centre. The database contains MRI scans and other data on the structure and function of the developing brains. More than 500 children and adolescents from newborns to 18-year-olds had brain scans multiple times over a period of years as well as intelligence, neuropsychological, verbal, non-verbal and behavioural tests. This information is now contained within the database allowing scientists to study how normal developmental changes in brain anatomy relate to motor and behavioural skills, such as motor coordination and language acquisition. Even higher-order skills like planning, IQ, and organizational skills can be assessed.

Previous studies have shown that intelligence and cognitive ability are correlated with regional brain structure and function. The association between regional cortical thickness and intelligence has been little studied and most previous studies of normal children had a relatively small sample. So with improvements in MRI-based quantification of cortical thickness and a much larger sample, researchers aimed to examine this relationship and to further characterize and identify brain areas where cortical thickness was associated with cognitive performance.

Cortical thickness may in part reflect the amount of complex connections between nerve cells. In other words, thicker cortices are likely to have more complex connections with consequences on cognitive ability. A positive link between cortical thickness and cognitive ability was detected in many areas of the frontal, parietal, temporal and occipital lobes. The regions with the greatest relationship were the 'multi-modal association' areas, where information converges from various regions of the brain for processing.

"A principal finding of this study is that it supports a distributed model of intelligence where multiple areas of the brain are involved with cognitive ability difference instead of the view that there is just one centre or structure important for intelligence differences in the brain," says Dr. Sherif Karama, psychiatrist at the MNI and co-investigator in the study. "Previous studies have shown a link between intelligence differences and individual brain structure or function. This is the first time that a correlation between a general cognitive ability factor and essentially most, if not all, cortical association areas is demonstrated in the same study."

A deeper insight into normal cognitive functioning and abilities is an important first step in the understanding of cognitive decline observed in the elderly as well as in those with various pathologies ranging from multiple sclerosis to schizophrenia, depression and mental retardation. Such an understanding may eventually lead to interventions that may be able to prevent or alleviate the decline or complications in cognitive function.


Contact: Anita Kar
McGill University

Related medicine news :

1. MRI finds breast cancer before it becomes dangerous
2. Comparison of obstetric outcomes between on-call and patients own obstetricians
3. Continued Statin Use Boosts Post-Stroke Outcomes
4. Video: Nutrition Comes to NASCAR
5. MinuteClinic Becomes Participating Provider with Assurant Health
6. QI projects may -- or may not -- improve patient safety and outcomes
7. Hospitals Could Improve Outcomes for Patients and Save Millions According to Hill-Rom 10th Annual Pressure Ulcer Survey
8. Neusoft Becomes First Global Growth Company Partner of World Economic Forum
9. Michael Moores SiCKO Becomes the Third Highest Grossing Documentary of All Time Surpassing An Inconvenient Truth
10. Womens World Banking Welcomes New Network Member From Tunisia
11. Bypass Off-Pump Boosts Womens Outcomes
Post Your Comments:
Related Image:
When it comes to intelligence, size matters
(Date:6/27/2016)... ... 27, 2016 , ... "FCPX editors can now reveal their media with growing ... said Christina Austin - CEO of Pixel Film Studios. , ProSlice Color brings ... users can now reveal the media of their split screens with growing colorful panels. ...
(Date:6/27/2016)... ... June 27, 2016 , ... ePAY ... partnership with Connance, a healthcare industry leader providing predictive analytics to optimize ... combine to provide health systems, hospitals and ambulatory surgical centers with dramatic ...
(Date:6/27/2016)... ... 2016 , ... recently awarded their highest five-star rating to Best Buy ... in the United States and Canada wear eyeglasses. Once considered to be a purely ... make a fashion statement. Even celebrities use glasses as a way of creating an ...
(Date:6/26/2016)... ... June 26, 2016 , ... On June 10-11, 2016, A Forever Recovery, a ... and World’s Longest Breakfast Table in Battle Creek, MI, where the rehabilitation facility is ... to some of the world’s leading providers of cereal and other breakfast foods. Its ...
(Date:6/26/2016)... ... , ... PawPaws brand pet supplements owned by Whole Health Supply ... health of felines. The formula is all-natural and is made from Chinese herbs that ... Cat Kidney Support Supplement Soft Chews are Astragalus Root Extract and Rehmannia Root ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... 27, 2016  VMS Rehab Systems, Inc. ( ... whatever measures required to build a strong and stable ... currently listed on the OTC Markets-pink current trading platform. ... CEO, "We are seeing an anomaly in market trading ... only by the Company, but shareholders and market players ...
(Date:6/24/2016)... Calif. , June 24, 2016  Global ... a biopharmaceutical company developing novel therapeutics for the ... needs, today announced the closing of its previously ... common stock, at the public offering price of ... the offering were offered by GBT. GBT estimates ...
(Date:6/24/2016)... The Academy of Managed Care Pharmacy (AMCP) ... would allow biopharmaceutical companies to more easily share health ... and coverage decisions, a move that addresses the growing ... The recommendations address restrictions in the sharing of ... label, a prohibition that hinders decision makers from accessing ...
Breaking Medicine Technology: