prosthesis

STEER: 3D Printed Guide for Nerve Regrowth Control and Neural Interface in Non-Human Primate Model

Author(s): Agata Blasiak, Kian Ann Ng, Marshal Dian Sheng Wong, Chne-Wuen Tsai, Astrid Rusly, Gil Gerald Lasam Gammad, Kai Voges, Camilo Libedinsky, Shih Cheng Yen, Nitish V. Thakor, Amitabha Lahiri
STEER: 3D Printed Guide for Nerve Regrowth Control and Neural Interface in Non-Human Primate Model 461 480 IEEE Transactions on Biomedical Engineering (TBME)
Our work aims to address the challenging problem of reactive-fibrosis in establishing a long term peripheral neural interface (PNI). We present a novel interface – STEER PNI – that harnessed the fibro-axonal growth from the nerve and incorporated fibrosis in its design. STEER PNI consists of a synthetic guide that steers fibro-axonal growth toward encapsulation of the electrodes incorporated within the guide itself. We validated the functionality of this interface in macaques with electrophysiology and immunohistochemistry. This design provides a practical approach for creating long term neural interfaces with applications in neuro-prosthetics and beyond. read more

Automatic control of prosthetic socket size for people with transtibial amputation: Implementation and Evaluation

Author(s): Ethan J. Weathersby, Joseph L. Garbini, Brian G. Larsen, Jake B. McLean, Andrew C. Vamos, Joan E. Sanders
Automatic control of prosthetic socket size for people with transtibial amputation: Implementation and Evaluation 170 177 IEEE Transactions on Biomedical Engineering (TBME)
People wearing a lower leg prosthesis often experience discomfort or pain during the day because of changes in socket fit. To solve this problem, we created a motor-actuated prosthetic socket that automatically maintains socket fit by continuous adjustment of the socket size. A proportional-integral (PI) control system is implemented to adjust socket size based on data collected from an inductive sensor embedded within the socket wall. The sensed distance is representative of limb-to-socket distance. Experiments on participants with transtibial limb amputation verify that the system properly maintains and responds to a change in set point to maintain socket fit. read more
Limb Position Tolerant Pattern Recognition for Myoelectric Prosthesis Control with Adaptive Sparse Representations from Extreme Learning

Limb Position Tolerant Pattern Recognition for Myoelectric Prosthesis Control with Adaptive Sparse Representations from Extreme Learning

Author(s): Joseph L. Betthauser, Christopher L. Hunt, Luke E. Osborn, Matthew R. Masters, Gyorgy Levay, Rahul R. Kaliki, Nitish V. Thakor
Limb Position Tolerant Pattern Recognition for Myoelectric Prosthesis Control with Adaptive Sparse Representations from Extreme Learning 170 177 IEEE Transactions on Biomedical Engineering (TBME)

Electromyogram (EMG) signals can be used to decode the intended movements of an amputee for control of a dexterous upper-limb prosthesis. However, normal prosthesis use involves changes in upper-limb positions…

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Biomechanical Effects of Stiffness in Parallel with the Knee Joint during Walking

Author(s): Kamran Shamaei, Massimo Cenciarini, Albert A. Adams, Karen N. Gregorczyk, Jeffrey M. Schiffman, Aaron M. Dollar
Biomechanical Effects of Stiffness in Parallel with the Knee Joint during Walking 708 738 IEEE Transactions on Biomedical Engineering (TBME)

  Lower-extremity exoskeletons have been actively investigated in the past few decades intending to augment the locomotion performance of able-bodied users in terms of metabolic cost, load carrying capacity, fatigue,…

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