Navigation Links
Now, Natural Looking, Energy Efficient Robotic Ankles for Amputees

Amputees can now breathe a sigh of relief for researchers at the Massachusetts Institute of Technology (MIT) in Boston have developed two robotic devices that mimic the human ankle, give them more natural, energy-efficient gaits.

Dr. Hugh Herr, Assistant Professor and Director of the Biomechatronics Group at the institute, has been quoted by Discovery News as saying that these spring-enabled, motor-driven devices could one day evolve into prostheses that attach directly to bone and draw on neural implants and sensors for automatic feedback and control.

"Human beings aren't disabled. It's the technology that is provided to human beings that is disabled," Herr said. Herr and his group recently demonstrated their Active Ankle-Foot Prosthesis, part of a five-year research project funded by the Veteran's Administration.

The goal, they said, is to create an entire leg prosthetic comprised of sophisticated electronics and sensors that receive signals from a person's brain and use those signals to control limb motion.

Herr speaks from first-hand experience. He lost both legs below the knee to frostbite in a rock-climbing accident more than 25 years ago. When he was fitted with his first pair of artificial legs, he wasn't happy with them.

"My doctors told me that this was the best, and I should live with and accept what I was given," he said. But Herr didn't. Instead he devoted his career to developing something better. The current design has sensors, springs and a motor that work together to mimic how the human ankle stores and releases energy as a person walks.

When an able-bodied person walks, the heel contacts the ground in front. Next, the ankle extends until the foot becomes flat. The ligaments and tendons in the ankle and foot absorb energy during this phase and, as the foot rolls on its ball, release the energy to allow the ankle to extend and propel the body upward and forward.

An amputee wearing a conventional prosthetic receives a push at the ankle, but from passive springs that do little to propel the body. As a result, these people expend 20 to 30 percent more metabolic energy as compared to able-bodied folks.

By using the Active Ankle-Foot Prosthesis, an amputee can walk with 20 percent less metabolic energy than conventional prostheses. Meanwhile, at Arizona State University's Polytechnic campus, Associate Professor Thomas Sugar and his team are working on another robotic ankle model.

They have developed a device named Sparky, for "spring ankle with regenerative kinetics." Sugar's device lacks sensors but has springs specifically adjusted to a person's weight. A motor adjusts the position of the springs so that they store and release the energy to propel the ankle forward. The device weighs just two poundscompared to a human ankle and shinbone, which weigh four or five pounds.

Sugar's prosthetic is part of a three-year project administered by the U.S. Army Medical Research and Materiel Command and could be commercialized by 2009, but he says that the biggest impediment is to provide enough battery power for day-to-day walking.

Small batteries, he says, need to be charged more frequently, while large batteries are too heavy.


'"/>




Related medicine news :

1. Accuracy of Some Natural Family Planning Methods Questioned .
2. Natural formula for protection against vision loss
3. Naturally Occurring Hormone Can Lead To Miscarriage
4. Treating Leukemia With Natural Cells
5. Natural Sulfur Can Treat Pain From Osteoarthritis
6. Chronic Post-Traumatic Stress Disorder (PTSD) Risk In Young Natural Disaster Survivors
7. Tsunami Unplugged: Natural Disasters Favor the Under-privileged
8. ‘Natural Spring’ Starts A Week Ahead Now Than Before: UNH Scientit
9. An After-Dinner Nap Is A Natural Thing, Scientists Proved
10. The Most Natural Thing in the World
11. Natural Approach to Immune Regulation May Help Transplant Patients
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:12/9/2016)... Woodland Hills, CA (PRWEB) , ... December 09, ... ... center for young adults, celebrated its 10th anniversary with the grand opening of ... Hills, California. The successful event spanned two days, December 2-3, and was attended ...
(Date:12/9/2016)... NJ (PRWEB) , ... December 09, 2016 , ... ... Founders Ball at The Pierre Hotel in New York, NY, on December 3rd, ... benefactors, dignitaries and physicians attended the annual event, which raised over $1 million ...
(Date:12/9/2016)... ... December 09, 2016 , ... The Pennsylvania Athletic ... (PCN) during the summer of 2016. The program was made possible by a ... States Department of Health and Human Services Administration. The broadcast, Use Your ...
(Date:12/8/2016)... , ... December 08, 2016 , ... ... Research Institute (WCRI) officially opened registration today for its 33rd Annual Issues ... Boston, MA . , The theme of the conference is “Persistent Challenges and ...
(Date:12/8/2016)... , ... December 08, 2016 , ... ... Chester County, a Property owned by an affiliate of Seavest, has won a ... Penn Medicine Southern Chester County ambulatory care center (ACC) was named “Best New ...
Breaking Medicine News(10 mins):
(Date:12/8/2016)... , Dec. 8, 2016 Australia Glaucoma ... GlobalData,s new report, "Australia Glaucoma Surgery Devices ... on the Australia Glaucoma Surgery Devices market. The ... volume (in units) and average prices (USD) within ... report also provides company shares and distribution shares ...
(Date:12/8/2016)... , Dec. 8, 2016 KEY FINDINGS ... poised to grow in 2017-2023. Various reasons for growth ... obese population, higher incidences of chronic diseases, high recovery ... mobility aid services. Medical lifting sling refers to ... with limited mobility. These slings connect to the lift ...
(Date:12/8/2016)... INDIANAPOLIS , Dec. 8, 2016  Eli Lilly ... detailed results of its phase 3 EXPEDITION3 trial at ... (CTAD) meeting. As previously disclosed, solanezumab did not meet ... study of solanezumab initiated in people with mild dementia ... pursue regulatory submissions for solanezumab for the treatment of ...
Breaking Medicine Technology: