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:2/5/2015)... Feb. 3, 2015 Despite a lack ... industries such as consumer electronics, automotive, storage and ... mount technology (SMT) screen printers. Innovations in electronics ... will push the adoption curve up. Meanwhile, sale ... as glue dispensers are indispensable in the production ...
(Date:1/22/2015)... MELBOURNE, Fla. , Jan. 13, 2015  Today, ... wearable technology, launched its crowdfunding campaign on Fundable, ... accelerate the build of production capacity to meet ... Photo - http://photos.prnewswire.com/prnh/20150113/168790 ...
(Date:1/22/2015)... Inc. (NASDAQ: NXTD and NXTDW) a biometric authentication company ... of the Wocket™ smart wallet at CES 2015 in Las ... one of the "11 Hot Products at CES" in a review published ... Far" by Newseveryday.com and "The top 10 gadgets from CES 2015" by ...
Breaking Biology News(10 mins):End-user Demand Spurs Global SMT Screen Printers and Glue Dispensers Market 2End-user Demand Spurs Global SMT Screen Printers and Glue Dispensers Market 3FreeWavz Launches on Fundable to Drive Speed-to-Market in 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 3
... Rockville, MD -- The Biophysical Society has ... travel awards to attend the Biophysical Society,s 56th ... in San Diego, California, February 25-29, 2012. The ... initiate further interaction between American biophysicists and scientists ...
... climate-smart agriculture can lead to climate change adaptation ... are addressed., "Climate-smart agriculture has the potential to ... systems to climate impacts and mitigate climate change ... says Henry Neufeldt the lead expert on climate ...
... material that can store heat energy collected from the sun ... has been developed by researchers in the India. The material ... a forthcoming issue of the International Journal of Renewable ... sunny parts of the world that get very cold at ...
Cached Biology News:Biophysical Society Announces winners of 2012 International Relations Committee travel awards 2Biophysical Society Announces winners of 2012 International Relations Committee travel awards 3Biophysical Society Announces winners of 2012 International Relations Committee travel awards 4Climate-smart agriculture should be livelihood-smart too 2Climate-smart agriculture should be livelihood-smart too 3
(Date:2/27/2015)... Md. and SUMMERLAND, British Columbia ... (NYSE: XON ), a leader in ... agreement to acquire  Okanagan Specialty Fruits (OSF), the ... apple , the world,s first non-browning apple. Through the ... yielding fruit that is more appetizing and convenient for ...
(Date:2/27/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/p2ddnr/global_market ) ... of Trypsin" report to their offering. , ... providing comprehensive data on Trypsin globally and regionally ( ... North America , Latin America ... Trypsin This report focuses on three primary areas; ...
(Date:2/27/2015)... , Feb. 27, 2015 Bionomics Limited (ASX:BNO, ... DisrupTOR-1 trial of BNC105 in patients with metastatic renal ... Orlando, Florida . The data will be ... City of Hope Comprehensive Cancer Center in ... The new data identifies Ferritin and IL-8 as ...
(Date:2/27/2015)... 2015 Cytokinetics, Incorporated (Nasdaq: CYTK) announced ... with patients and health care advocates in the United ... Day®. Rare Disease Day is dedicated to elevating ... the special challenges faced by patients with rare diseases ... proud to stand alongside patients and caregivers representing the ...
Breaking Biology Technology:Intrexon to Acquire Okanagan Specialty Fruits 2Intrexon to Acquire Okanagan Specialty Fruits 3Intrexon to Acquire Okanagan Specialty Fruits 4Global Market Report of Trypsin 2014-2018 2New BNC105 Biomarker Data to be Presented at US Cancer Conference 2New BNC105 Biomarker Data to be Presented at US Cancer Conference 3New BNC105 Biomarker Data to be Presented at US Cancer Conference 4New BNC105 Biomarker Data to be Presented at US Cancer Conference 5Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 2Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 3Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 4Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 5Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 6
... 20, 2011 Mylan Inc. (Nasdaq: MYL ) ... live webcast on Tuesday, May 3, 2011, at 8:30 a.m. ... quarter 2011, which ended March 31, 2011. Mylan will release ... The dial-in number to access the call is ...
... Calif., April 20, 2011 So which is it? ... powerful lobbying group, the California Medical Association (CMA), is ... to give rural area hospitals the ability to employ ... a bill, AB 783, authored by Assembly Member Mary ...
... RAPIDS, Mich., April 20, 2011 Van Andel Institute,s ... LEED Platinum status by the United States Green Building ... remain a leader in sustainable development, marks VAI as ... Construction in Michigan, and sets the Institute and its ...
Cached Biology Technology:CA PPG Says California Physicians Contradict Themselves Regarding Employment Legislation 2Van Andel Institute Earns Highest "Green Building" Award 2Van Andel Institute Earns Highest "Green Building" Award 3Van Andel Institute Earns Highest "Green Building" Award 4
Mouse Wnt-9b Affinity Purified Polyclonal Ab Keywords: Wnt 9b Protein Family: Cancer Stem Cell Markers, Wnt Ligands...
One-step, microplate or cuvet, colorimetric, linear detection range 6 mg/dL to 100mg/dL. Procedure: 15 min....
assays for phosphatase, lipase, nucleoside triphosphatases (ATPase, GTPase etc). HTS and follow up studies for phosphatase inhibitors. Quantitation of phosphate content in protein, lipids, and DNA....
EnzChek cellulase substrate *blue fluorescent, 339/452...
Biology Products: