Navigation Links
Bigger brain size matters for intellectual ability

Brain size matters for intellectual ability and bigger is better, McMaster University researchers have found.

The study, led by neuroscientist Sandra Witelson, a professor in the Michael G. DeGroote School of Medicine, and published in the December issue of the journal Brain, has provided some of the clearest evidence on the underlying basis of differences in intelligence.

The study involved testing of intelligence in 100 neurologically normal, terminally ill volunteers, who agreed that their brains be measured after death.

It found bigger is better, but there are differences between women and men.

In women, verbal intelligence was clearly correlated with brain size, accounting for 36 percent of the verbal IQ score. In men, this was true for right-handers only, indicating that brain asymmetry is a factor in men.

Spatial intelligence was also correlated with brain size in women, but less strongly. In men, spatial ability was not related to overall brain size. These results suggest that women may use verbal strategies in spatial thinking, but that in men, verbal and spatial thinking are more distinct.

It may be that the size or structure of the localized brain regions which underlie spatial skills in men is related to spatial intelligence, as was shown in previous research in Witelson's lab on the brain of Albert Einstein.

In a further sex difference, brain size decreased with age in men over the age span of 25 to 80 years, but age hardly affected brain size in women. It is not known what protective factors, which could be genetic, hormonal or environmental, operate in women.

It remains to be determined what the contribution of nature and nurture are to this cerebral size relationship with intelligence, Witelson said. She added that the results point to the need for responsibility in considering the likely future use of magnetic imaging (or MRIs) of brain structure as a measure of ability in student an
'"/>

Source:McMaster University


Page: 1 2

Related biology news :

1. Controversial drug shown to act on brain protein to cut alcohol use
2. Mouse brain cells rapidly recover after Alzheimers plaques are cleared
3. Mouse brain tumors mimic those in human genetic disorder
4. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
5. First atlas of key brain genes could speed research on cancer, neurological diseases
6. NYU study reveals how brains immune system fights viral encephalitis
7. Stem cells from brain transformed to produce insulin at Stanford
8. Birds brains reveal source of songs
9. Loves all in the brain: fMRI study shows strong, lateralized reward, not sex, drive
10. Revolutionary nanotechnology illuminates brain cells at work
11. A puzzle piece found in unraveling the wiring of the brain
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Bigger brain size matters for intellectual ability

(Date:7/24/2014)... Bhavani Iyer, O.D., a low vision specialist at The ... Medical School, has been awarded a grant to help ... with eyeglasses, medication or surgery. , Even with corrective ... at best. However, there are a variety of low ... to help offset their vision loss. , Iyer is ...
(Date:7/24/2014)... experts gathered at NJIT this week for an all-day ... U.S. Environmental Protection Agency (EPA) to dredge toxic sediment ... , The EPA has called the plan, which proposes ... capping sections of the riverbed, one of the largest ... be dredged and disposed off-site. , "We need to ...
(Date:7/24/2014)... To reduce fire hazard in the United States, wildland ... woody shrubs and suppressed trees (ladder fuels). These ... periods of low fire danger in order to dispose ... hazardous air pollutants, managers often cover all or part ... referred to as agricultural plastic, in order to keep ...
Breaking Biology News(10 mins):UTHealth Dr. Bhavani Iyer awarded low vision grant 2Experts Weigh the Pros and Cons of a $1.7 Billion EPA Cleanup Plan for the Passaic River at an NJIT 2Study gives new perspective on agricultural plastic, debris burning, and air quality 2
... to the growing list of genetic variants that determine ... by Cell Press on December 30 in the ... previously unknown variants associated with height and might provide ... Although environmental variables can impact attained adult height, ...
... large quantities of nitrate-rich fertilizer to realize optimal ... to balance the amount of nitrogen needed for ... leach into ground and surface waters. Increased interest ... to identify genotypes that have a characteristic called ...
... producers have traditionally relied heavily on hand thinning, a ... increasing labor costs and a limited workforce, peach and ... such as string thinners to minimize the need for ... promising results when it was evaluated in four U.S. ...
Cached Biology News:Large-scale analysis identifies new genetic alterations associated with height 2Improving nitrogen use efficiency lessens environmental impact 2Hybrid string blossom thinner tested in peach orchards 2
(Date:7/25/2014)... July 25, 2014 According to a ... Drugs Market - Global Industry Analysis, Size, Share, Growth, ... drugs market is estimated at USD 161,056.5 million in ... of 10.1% from 2014 to 2020, to reach an ... The biological drugs market is witnessing a significant growth ...
(Date:7/25/2014)... Lawrence Livermore scientists Charles Westbrook and William Pitz ... The World's Most Influential Scientific Minds ." , Westbrook ... were identified by analyzing citation data over the last ... work (2002-2012 and 2012-2013). The two were selected from ... , "This recognition is a great honor for Charlie ...
(Date:7/25/2014)... At the request of the AMA, the ... for the public comment period (Docket No. FAA-2014-0396) for ... established by Congress as part of the FAA Modernization ... the new deadline for comments as September 23, 2014. ... published in the Federal Register on July 25, 2014, ...
(Date:7/24/2014)... RIDGE, Tenn., July 24, 2014 -- A novel combination ... the Department of Energy,s Oak Ridge National Laboratory an ... for its unusual physical and electrochemical properties. , ... how oxygen affects the surface of a perovskite manganite, ... behavior. The new avenue to understand surface behavior could ...
Breaking Biology Technology:Biological Drugs Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 2Biological Drugs Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 3Scientists Burst onto Influential List for Combustion Research 2Scientists Burst onto Influential List for Combustion Research 3Scientists Burst onto Influential List for Combustion Research 4FAA Grants Comment Extension at the Request of AMA 2ORNL study reveals new characteristics of complex oxide surfaces 2
... 2011 Operational and Financial Results ... ... --> ... var first_result; // Results are keyed by longUrl, so we need to grab the first one. for (var r ...
... Nov. 11, 2010 StemCyte, Inc., one of the ... companies, is proud to announce that the Company has ... U.S. Internal Revenue Service,s Qualifying Therapeutic Discovery Project (QTDP) ... fewer than 250 employees. The Patient Protection ...
... (Nasdaq: ARAY ), a global leader in the ... to present at the Lazard Capital Markets, Healthcare Conference in ... a.m. ET/7:30 a.m. PT. A live webcast of ... page of the Company,s Web site at http://www.accuray.com . ...
Cached Biology Technology:YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 2YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 3YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 4YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 5YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 6YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 7YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 8YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 9YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 10YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 11YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 12YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 13YM BioSciences Reports Fiscal First Quarter 2011 Operational and Financial Results 14StemCyte Awarded $488,950 for Advanced Therapeutic Applications of Umbilical Cord Blood Stem Cells from the Qualifying Therapeutic Discovery Project (QTDP) 2Accuray Incorporated to Speak at Seventh Annual Lazard Capital Markets' Healthcare Conference 2
Preparation Note: Prepared by method of Wimmer, E., et al., Biochemistry, 7, 2623 (1968). Quality Clarifier: Acceptor Activity: approx. 1000 picomoles phenylalanine per A 260 unit (not determined b...
... which is based on a new flow-through technology, ... in situ hybridization of tissues on microscope slide ... study of gene expression, in situ hybridization (ISH) ... can be used to validate and confirm results ...
... Array Analyst Software has been optimized for ... algorithms allow the software to quickly and ... each well of an ELISA plate or ... Analyst Software has been customized to incorporate ...
... products feature a dual strength adhesive system which ... use. The adhesives on either side of the ... adheres to the glass has an easy release ... coverslip, forms a stronger bond. This means that ...
Biology Products: