Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Prostheses with Sensory Feedback

06.02.2014
Freiburg researchers have developed electrodes that help amputees to grasp at objects

The patient Dennis Aabo Sorensen grasps at a mandarin orange with his artificial hand. Source: LifeHand2 Project

The patient Dennis Aabo Sorensen grasps at a mandarin orange with his artificial hand. Source: LifeHand2 Project

An artificial limb that enables amputees to grasp at an object and feel it as though they were using their real hand: Thanks to Freiburg microsystems engineer Prof. Dr. Thomas Stieglitz and the international research group participating in the project LifeHand2, this has now become a reality. The scientists present the findings of their project in the journal Science Translational Medicine.

Surgeons implanted two ultra-thin electrodes each directly into the ulnar and median nerves in the upper arm of Dennis Aabo Sørensen, a patient with an amputated lower arm. The electrodes send sensory data by means of electrical impulses from the patient’s artificial hand directly to his brain over the peripheral nervous system. They give him information about the shape and consistency of the objects he grasps at – even when he cannot see them.

The patient learned to control his artificial hand with only little prior training and more quickly than the scientists had thought possible. He managed to sense objects like a plastic cup, a mandarin orange, and a heavy block of wood while being blindfolded and to take hold of them with a precise grip and the right amount of force. The combination of technology and the patient’s biological system worked almost intuitively.

The electrodes were developed in Thomas Stieglitz’ laboratory, professor of Biomedical Microtechnology at the Department of Microsystems Engineering of the University of Freiburg. “Our research helps patients who have lost a limb to move their prostheses in a completely natural way. It is always a very special moment for me as an engineer to see technological developments be implemented successfully on a patient after many years in the lab,” said the researcher. As this was only an initial test, the electrodes will have to be removed after 30 days as per the European directive on medical devices. The team plans to conduct further studies on patients in Rome, Italy; Lausanne, Switzerland; and Aalborg, Denmark.

Six research institutions in Italy, Switzerland, and Germany are participating in the project LifeHand 2. Launched in 2008, the project originated from the European Union–funded project TIME and the Italian project NEMESIS. The clinical director of the study is Prof. Dr. Paolo Maria Rossini, and the operation was performed by Prof. Dr. Eduardo Marcos Fernandez. Both are from the Agostino Gemelli University Polyclinic in Rome. The project director is Prof. Dr. Silvestro Micera from the Swiss Federal Institute of Technology in Lausanne.


Original publication
S. Raspopovic, M. Capogrosso, F. M. Petrini, M. Bonizzato, J. Rigosa, G. D. Pino, J. Carpaneto, M. Controzzi, T. Boretius, E. Fernandez, G. Granata, C. M. Oddo, L. Citi, A. L. Ciancio, C. Cipriani, M. C. Carrozza, W. Jensen, E. Guglielmelli, T. Stieglitz, P. M. Rossini, S. Micera, Restoring Natural Sensory Feedback in Real-Time Bidirectional Hand Prostheses. Sci. Transl. Med. 6, 222ra19 (2014). http://stm.sciencemag.org/content/6/222/222ra19
Further information on Surprising Science:
www.pr.uni-freiburg.de/go/lifehand2
Film and photo material available on request.
Contact:
Prof. Dr. Thomas Stieglitz
Laboratory for Biomedical Microtechnology
Department of Microsystems Engineering (IMTEK)
Phone: +49 (0)761 / 203-7471
E-Mail: thomas.stieglitz@imtek.uni-freiburg.de
Natascha Thoma-Widmann
PR/Marketing Coordinator
Faculty of Engineering
University of Freiburg
Phone: +49 (0)761 / 203-8056
Mobile: +49 (0)171 / 7616720
E-Mail: thoma-widmann@tf.uni-freiburg.de

Prof. Dr. Thomas Stieglitz | University of Freiburg
Further information:
http://www.uni-freiburg.de
http://www.pr.uni-freiburg.de/go/lifehand2

More articles from Information Technology:

nachricht Wireless home automation systems reveal more than you would think about user behaviour
24.07.2014 | Universität des Saarlandes

nachricht No-wait data centers
17.07.2014 | Massachusetts Institute of Technology

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

“Lens on Life” - Artists and Scientists Explore Cell Divison

08.07.2014 | Event News

First International Conference on Consumer Research | ICCR 2014: Early bird deadline July 31, 2014

08.07.2014 | Event News

First evidence for painless atrial fibrillation treatment

04.07.2014 | Event News

 
Latest News

Size and Age of Plants Impact Their Productivity More Than Climate, UA Study Shows

24.07.2014 | Life Sciences

All-Clear for Nonlinear Optical Imaging

24.07.2014 | Health and Medicine

Monitoring Pulse After Stroke May Prevent a Second Stroke

24.07.2014 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>