Navigation Links
Robotic exoskeleton replaces muscle work

A robotic exoskeleton controlled by the wearer's own nervous system could help users regain limb function, which is encouraging news for people with partial nervous system impairment, say University of Michigan researchers.

The ankle exoskeleton developed at U-M was worn by healthy subjects to measure how the device affected ankle function. The U-M team has no plans to build a commercial exoskeleton, but their results suggest promising applications for rehabilitation and physical therapy, and a similar approach could be used by other groups who do build such technology.

"This could benefit stroke patients or patients with incomplete injuries of the spinal cord," said Daniel Ferris, associate professor in movement science at U-M. "For patients that can walk slowly, a brace like this may help them walk faster and more effectively."

Ferris and former U-M doctoral student Keith Gordon, who is now a post-doctoral fellow at the Rehabilitation Institute of Chicago, showed that the wearer of the U-M ankle exoskeleton could learn how to walk with the exoskeleton in about 30 minutes. Additionally, the wearer's nervous system retained the ability to control the exoskeleton three days later.

Electrical signals sent by the brain to our muscles tell them how to move. In people with spinal injuries or some neurological disorders, those electrical signals don't arrive full strength and are uncoordinated. In addition, patients are less able to keep track of exactly where and how their muscles move, which makes re-learning movement difficult.

Typically, robotic rehabilitative devices are worn by patients so that the limb is moved by the brace, which receives its instructions from a computer. Such devices use repetition to help force a movement pattern.

The U-M robotic exoskeleton works the opposite of these rehabilitation aids. In the U-M device, electrodes were attached to the wearer's leg and those electrical signals rece ived from the brain were translated into movement by the exoskeleton.

"The (artificial) muscles are pneumatic. When the computer gets the electrical signal from the (wearer's) muscle, it increases the air pressure into the artificial muscle on the brace," Ferris said. "Essentially the artificial muscle contracts with the person's muscle."

Initially the wearer's gait was disrupted because the mechanical power added by the exoskeleton made the muscle stronger. However, in a relatively short time, the wearers adapted to the new strength and used their muscles less because the exoskeleton was doing more of the work. Their gait normalized after about 30 minutes.

The next step is to test the device on patients with impaired muscle function, Ferris said.

Source:University of Michigan

Related biology news :

1. Penn Researchers Use Robotic Surgery
2. Penn Surgeons Use Completely Robotic Surgery to Successfully Treat Prostate Cancer
3. Robotic joystick reveals how brain controls movement
4. Robotic whiskers can sense three-dimensional environment
5. Robotic therapy helps restore hand use after stroke
6. Heart repair gets new muscle
7. Small worm yields big clue on muscle receptor action
8. New complete muscle grown in the lab
9. Spiders help scientists discover how muscles relax
10. Cant serve an ace? Could be muscle fatigue
11. Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

Post Your Comments:

(Date:11/18/2015)... , Nov. 18, 2015  As new scientific discoveries ... doctors and other healthcare providers face challenges in better ... and patients. In addition, as more children continue to ... patient,s adulthood and old age. John M. ... Children,s Hospital of Philadelphia (CHOP) . --> ...
(Date:11/17/2015)... 2015 Paris , ... --> Paris , qui s,est tenu ... le leader de l,innovation biométrique, a inventé le premier ... empreintes sur la même surface de balayage. Jusqu,ici, deux ... pour les empreintes digitales. Désormais, un seul scanner est ...
(Date:11/16/2015)... Nov 16, 2015  Synaptics Inc. (NASDAQ: ... solutions, today announced expansion of its TDDI product ... touch controller and display driver integration (TDDI) solutions ... These new TDDI products add to the previously-announced ... TD4302 (WQHD resolution), and TD4322 (FHD resolution) solutions. ...
Breaking Biology News(10 mins):
(Date:11/23/2015)... Columbia, Md. (PRWEB) , ... November 23, 2015 ... ... R&D 100 award for the development of its Nexera UC Unified Chromatography system. ... the 100 most technically significant new products of the year in the analytical ...
(Date:11/23/2015)... , November 23, 2015 ... to develop daclatasvir for 112 ... countries   --> --> ... for a hepatitis C medicine, signing an agreement with Bristol-Myers ... to help cure multiple genotypes of the HCV virus.  The ...
(Date:11/23/2015)... November 23, 2015 biochar market ... in 2015, and it is expected to grow with ... factors driving the growth of the global market include ... property of biochar, increased government initiatives and stringent environmental ... and stringent environment regulations are the key drivers for ...
(Date:11/23/2015)... 23, 2015 BioInformant, the ... serve the stem cell sector, announces ... report, "Mesenchymal Stem Cells – Advances ... presents 250 pages of coverage for ... industry. ...
Breaking Biology Technology: