Article

Intuitively and efficiently controlling multiple degrees of freedom is a major hurdle in the field of upper-limb prosthetics. A virtual reality myoelectric transhumeral prosthesis simulator has been developed for cost effectively testing novel control algorithms and devices. The system acquires electromyogram commands and residual limb kinematics, simulates the prosthesis dynamics, and displays the combined residual limb and prosthesis movements in a virtual reality environment that includes force-based interactions with virtual objects. A virtual Box and Block Test is demonstrated. Three normally limbed subjects performed the simulated test using a sequential and a synchronous control method. With the sequential method, subjects moved on average of 6.7 ± 1.9 blocks in 120 seconds, which was similar to the number of blocks the transhumeral amputees are able to move with their physical prostheses during clinical evaluation. With the synchronous method, subjects moved 6.7 ± 2.2 blocks. The virtual reality prosthesis simulator is thus a promising tool for developing and evaluating control methods, prototyping novel prostheses, and training amputees.

Langue : ANGLAIS