Navigation Links
The secret to chimp strength
Date:3/30/2009

February's brutal chimpanzee attack, during which a pet chimp inflicted devastating injuries on a Connecticut woman, was a stark reminder that chimps are much stronger than humansas much as four-times stronger, some researchers believe. But what is it that makes our closest primate cousins so much stronger than we are? One possible explanation is that great apes simply have more powerful muscles. Indeed, biologists have uncovered differences in muscle architecture between chimpanzees and humans. But evolutionary biologist Alan Walker, a professor at Penn State University, thinks muscles may only be part of the story.

In an article to be published in the April issue of Current Anthropology, Walker argues that humans may lack the strength of chimps because our nervous systems exert more control over our muscles. Our fine motor control prevents great feats of strength, but allows us to perform delicate and uniquely human tasks.

Walker's hypothesis stems partly from a finding by primatologist Ann MacLarnon. MacLarnon showed that, relative to body mass, chimps have much less grey matter in their spinal cords than humans have. Spinal grey matter contains large numbers of motor neuronsnerves cells that connect to muscle fibers and regulate muscle movement.

More grey matter in humans means more motor neurons, Walker proposes. And having more motor neurons means more muscle control.

Our surplus motor neurons allow us to engage smaller portions of our muscles at any given time. We can engage just a few muscle fibers for delicate tasks like threading a needle, and progressively more for tasks that require more force. Conversely, since chimps have fewer motor neurons, each neuron triggers a higher number of muscle fibers. So using a muscle becomes more of an all-or-nothing proposition for chimps. As a result, chimps often end up using more muscle than they need.

"[A]nd that is the reason apes seem so strong relative to hu
'/>"/>

Contact: Kevin Stacey
kstacey@press.uchicago.edu
773-834-0386
University of Chicago Press Journals
Source:Eurekalert

Page: 1 2

Related biology news :

1. Scientists discover important beauty secret for balanced skin color and tone
2. MIT unraveling secrets of red tide
3. Scientists eye secrets of retinal regeneration
4. NMR researchers unlock hydrogens secrets to spot polymorphism in pharmaceuticals
5. Scientists gather in New Zealand to share oceans secrets
6. New study uncovers secrets behind butterfly wing patterns
7. The key to unlocking the secret of highly specific DNAzyme catalysis
8. Eat chocolate, drink wine, add fun to life: SLU geriatrician shares secrets of staying young
9. Ripening secrets of the vine revealed
10. New research to decode the genetic secrets of prolific potato pest
11. Research reveals secrets of alcohols effect on brain cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)... YORK , Jan. 22, 2015   EyeLock, Inc. , ... it has appointed Steve Gerber to the new ... will be responsible for leading development of mobile platforms and ... years of success and innovation in the semiconductor industry to ...
(Date:12/22/2014)... 2014  The 2014 Holiday Season may be the brightest ... reports that the long anticipated floodgates for consumer biometrics ... for smart phones, tablets, and wearable mobile devices that ... billion users with nearly 4.8 billion biometric devices by ...
(Date:12/17/2014)... 15, 2014 Research and Markets ( http://www.researchandmarkets.com/research/s6qzt5/samsung_galaxy_s5 ... Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology ... http://photos.prnewswire.com/prnh/20130307/600769 Based on a ... introduces for the first time a fingerprint sensor in ...
Breaking Biology News(10 mins):EyeLock Names Steve Gerber as Senior Vice President of Mobile and Wearables 2First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 2Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2
... organic farming becomes more common, methods to identify ... a recent study in Journal of Environmental Quality, ... if non-organic, synthetic fertilizers were used on sweet ... de Investigacin y Desarrollo Agrario y Agrario y ...
... REM sleep deprivation procedure reduces cell proliferation in the ... of rats, according to a study published in the ... study, authored by Dennis McGinty, PhD, of the V.A. ... rats. REM sleep deprivation was achieved by a ...
... of Southern California have developed a prostate cancer vaccine ... of young mice genetically predestined to develop the disease. ... they suggest the same strategy might work for men ... potential diagnostic indicator of prostate cancer. By ...
Cached Biology News:Is it organic or not? 24 days of REM sleep deprivation contributes to a reduction of cell proliferation in rats 2Prostate cancer: Watchful wait or vaccinate? 2Prostate cancer: Watchful wait or vaccinate? 3
(Date:1/22/2015)... January 22, 2015 Crystal Diagnostics (CDx) Xpress ... it has received AOAC-PTM Certifications for the six non-O157 Shiga ... O145; collectively referred to as STEC or the “Big-6”) as ... forming unit (cfu) per 325 g of raw ground beef ...
(Date:1/22/2015)... zFlo Motion , a US leader ... exciting product from a new partner. STT-Systems has ... past 15 years, with offerings in the optical-motion capture, 3D ... system (inertial measurement unit), iSen, is opening eyes around the ...
(Date:1/22/2015)... 22, 2015 Controlled Substance Compliance Services ... helps companies check the legal requirements around using controlled ... China. , As their international operations expand and ... software solutions built as a result of the first ...
(Date:1/22/2015)... 22, 2015 Diagenode, Inc., a ... the Bioruptor® and complete solutions for epigenetics research, ... immunoprecipitation, alleviating the need for manual processing. The ... for ChIP of histones or transcription factors and ...
Breaking Biology Technology:Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 23D Motion Capture Just Got Easy 2Global Compliance Service for Controlled Substances to Expand to China 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2
... of Roche Diagnostics, North America, Has 25 Years of Life ... Sciences Industry ... KOOL ), a leading supplier of innovative products that,process and store ... Chief Executive Officer, Roche Diagnostics,Corporation, North America, has been named to ...
... with Company Estimates Highlighted by 11% Discovery ... Products and Services Growth -, ... ) today reported second quarter financial,results for 2008. Revenues were $34.0 ... quarter of $35.3 million. Revenues were impacted,by a $3.5 million decline ...
... ISLAND, S.C., Aug. 6 Denham Capital,("Denham") ... to $60 million in VitAG,Corporation ("VitAG"). VitAG ... fertilizer product capable of competing with and,outperforming ... of multiple biosolids-to-fertilizer manufacturing plants., "Denham,s ...
Cached Biology Technology:ThermoGenesis Names Tiffany Olson to Board of Directors 2ThermoGenesis Names Tiffany Olson to Board of Directors 3Caliper Life Sciences Reports Second Quarter 2008 Results 2Caliper Life Sciences Reports Second Quarter 2008 Results 3Caliper Life Sciences Reports Second Quarter 2008 Results 4Caliper Life Sciences Reports Second Quarter 2008 Results 5Caliper Life Sciences Reports Second Quarter 2008 Results 6Caliper Life Sciences Reports Second Quarter 2008 Results 7Caliper Life Sciences Reports Second Quarter 2008 Results 8Caliper Life Sciences Reports Second Quarter 2008 Results 9Denham Capital to Invest $60 Million in VitAG, Recycler of Municipal Biosolids 2
Rabbit Anti-conjugated Agmatine Polyclonal Antibody...
ABCA1 Immunogen: Mouse ABCA1-expressing HeLa stable transfectants. Storage: -20 C, Avoid Freeze/Thaw Cycles...
... ADAMTS16 ( Abpromise for all ... Synthetic peptide based on the ... the amino acid sequence is proprietary) ... 170690 SWISS Protein ...
Goat polyclonal to SART3 ( Abpromise for all tested applications). Antigen: Synthetic peptide: MSNADFAKLFLRK, corresponding to C terminal amino acids 951-963 of Human SART3 Entrez Gene ID: 9...
Biology Products: