Navigation Links
A tale of a tail -- Kangaroos' powerful 'fifth leg'
Date:7/2/2014

e says. "So, we wondered if they are able to use their tail just like a leg to push off and power their walking."

What's remarkable about this, suggests Donelan, is that the tail is anatomically quite different, being made up of more than 20 vertebrae taking on the roles of our feet, calves and thigh bones. "Animals have discovered many uses for their tails," he says, "but as far as we know, this is the first use of one as a leg."

Beyond better understanding kangaroos' movements, the research shows how important it is to push-off and help to redirect the body's velocity when transitioning from one stance limb to the next, Donelan adds. "We know healthy humans do this nearly perfectly. We know that people with gait disorders and disabilities don't do it as well, which increases the effort required for them to walk.

"Based on our original human research, fellow scientists and engineers have have built prosthetics and exoskeletons that help improve ability and make walking easier. And now we know that it is important enough that kangaroos have harnessed a limb originally evolved for swinging from trees to serve this role as functional fifth leg."

Unusual gaits by unusual animals, such as pentapedal walking by kangaroos, provide insight into the breadth of solutions available to the same biomechanical problem, notes Donelan, who has also studied the movement of shrews, cats, crocodiles, giraffes and elephants.

And what's not to find intriguing about kangaroos? "Their hopping is incredibly fast, powerful and efficient. Their walking, on the other hand, is as awkward as their hopping is graceful, but underlying the walking is this entirely new use for a tail. Biomechanically, it is all fascinating."


'/>"/>

Contact: Max Donelan
mdonelan@sfu.ca
778-782-3210
Simon Fraser University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Faster, higher, stronger: A protein that enables powerful initial immune response
2. Common bean genome sequence provides powerful tools to improve critical food crop
3. Team validates potentially powerful new way to treat HER2-positive breast cancer
4. Mouse study points to potentially powerful tool for treating damaged hearts
5. Powerful tool for genetic engineering
6. Creating smaller, and more powerful, integrated circuits
7. Powerful gene-editing tool appears to cause off-target mutations in human cells
8. UMass Amherst researchers develop powerful new technique to study protein function
9. Inspiring teens with research virus: Expert-mentored bioscience contest proves a powerful vector
10. A dual look at photosystem II using the worlds most powerful X-ray laser
11. Powerful enzymes create ethanol from agricultural harvest waste
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/19/2014)... study the unique bioelectric signaling system of the electric ... The OU researcher is working to understand how ... signals used to map the world around them. ... 500-600 discharges a second throughout their lives. The ... but necessary for survival. , "There is evidence that ...
(Date:9/19/2014)... , Sept. 19, 2014 Nxt-ID, Inc. (Nasdaq: ... company focused on the growing m-commerce market, updates the "Wocket in ... in the lightweight and light middleweight weight classes, Vinny Pazienza ... was announced that Game of Thrones actor Ciaran ... with Children star Katey Sagal have been cast ...
(Date:9/18/2014)... located deep in the primitive brainstem has revealed how ... Harvard School of Medicine and the University at Buffalo ... the second "sleep node" identified in the mammalian brain ... to produce deep sleep. , Published online in August ... fully half of all of the brain,s sleep-promoting activity ...
Breaking Biology News(10 mins):NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 2NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 3No sedative necessary: Scientists discover new 'sleep node' in the brain 2
... for detecting cocaine –?made with inexpensive, off-the-shelf electronics –?has ... University of California, Santa Barbara. Two local high school ... The potential applications of the sensor are far-reaching and ... high school students made their own sensors and collected ...
... that highly active antiretroviral therapy (HAART) is very cost-effective, ... shows that reimbursement to physicians treating patients with HIV ... study findings are reported in the April 1 issue ... HAART has led to dramatic decreases in illness and ...
... the ends of bones where they meet in a ... can lead to degenerative disease. Treatments and experimental approaches ... but currently there is no method to fully restore ... delivery of therapeutic proteins to the injured site is ...
Cached Biology News:Portable cocaine sensor developed at UC Santa Barbara 2Portable cocaine sensor developed at UC Santa Barbara 3Study shows AIDS drugs cost-effective, care underfunded 2Study shows AIDS drugs cost-effective, care underfunded 3Stem cells from muscles can repair cartilage 2Stem cells from muscles can repair cartilage 3
(Date:9/18/2014)... LONDON , Sept. 18, 2014 ... near-patient testing, is performed outside a clinical laboratory. ... hence in administrating appropriate treatments and medication. POCT ... and prevalence of lifestyle diseases such as diabetes, ... and user-friendly. POCT devices are standardized to minimize ...
(Date:9/18/2014)... 2014 Texas Governor Rick Perry, ... A&M Health Science Center CEO Brett Giroir, M.D., ... and Human Services (HHS), State of Texas and ... influenza vaccine manufacturing facility in Bryan, Texas, which ... the Texas A&M Biocorridor – a rapidly evolving ...
(Date:9/18/2014)... DUBLIN , Sept. 18, 2014 ... the "Global Companion Diagnostics (Polymerase Chain Reaction, In-situ ... report to their offering. The ... a CAGR of 22.7% from 2014 to 2019. Factors ... treatment, growing adoption of companion diagnostics by the pharmaceutical ...
(Date:9/18/2014)... SEATTLE , Sept. 18, 2014 /PRNewswire/ - Oncothyreon ... pricing of previously announced concurrent but separate underwritten offerings ... price to the public of $2.00 per share, for ... of its Series A Convertible Preferred Stock at a ... expected gross proceeds of $20 million. Each share of ...
Breaking Biology Technology:POCT Market in China 2014-2018 2Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 2Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 3Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 4Global Companion Diagnostics (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to 2019 2Global Companion Diagnostics (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to 2019 3Oncothyreon Prices $40 Million Concurrent Public Offerings of Common Stock and Preferred Stock 2Oncothyreon Prices $40 Million Concurrent Public Offerings of Common Stock and Preferred Stock 3
... was involved in the cloning of Dolly the sheep said ... coverage of embryonic stem cell research, which could be raising ... corner when they are at least a few years away. ... said news of the possibilities of human embryonic stem cell ...
... their best mind you, growing up was "Aftermath", an appropriate label ... 2006- Chicago. , ,As BIO 2006 - Chicago is still fresh ... the outcome, but so many others have already done so that ... more of the facts emerge (like the final attendance number). Suffice ...
... - A young company with a preventive solution to identity ... G. Steven Burrill Technology Business Plan Competition, but if area ... they better act quickly. , , Din and Newport ... plan. Khaja M. Din, president IPIC (Internet ...
Cached Biology Technology:Researchers say scientific reporting needs more perspective, less hype 2Researchers say scientific reporting needs more perspective, less hype 3BIO 2006 aftermath and a taste of bio-generics 2BIO 2006 aftermath and a taste of bio-generics 3BIO 2006 aftermath and a taste of bio-generics 4BIO 2006 aftermath and a taste of bio-generics 5BIO 2006 aftermath and a taste of bio-generics 6BIO 2006 aftermath and a taste of bio-generics 7BIO 2006 aftermath and a taste of bio-generics 8Winner of Burrill competition courted by North Carolina investors 2Winner of Burrill competition courted by North Carolina investors 3
Polyclonal Antibody to HADHB...
normal human fibroblasts Source: Cell Lysate Form: Ready to Use Application: Western Blotting Control...
A431 cells Source: Cell Lysate Form: Ready to Use Application: Western Blotting Control...
Purified anti-Fanconi anemia D2-Phosphorylated (Ser222)...
Biology Products: