This article and any supplementary material should be cited as follows: Witteveen HJ, de Rond L, Rietman JS, Veltink PH. Hand-opening feedback for myoelectric

This article and any supplementary material should be cited as follows: Witteveen HJ, de Rond L, Rietman JS, Veltink PH. Hand-opening feedback for myoelectric forearm prostheses: Performance in virtual grasping tasks influenced by different levels of distraction. J Rehabil Res Dev. 2012;49(10):XX–XX. http://dx.doi.org/10.1682/JRRD.2011.12.0243

Slideshow ProjectDOI:10.1682/JRRD.2011.12.0243JSP

Hand-opening feedback for myoelectric forearm prostheses:

Performance in virtual grasping tasks influenced by different

levels of distraction

Heidi J. B. Witteveen, MSc; Leonie de Rond, BSc; Johan S. Rietman, PhD, MD; Peter H. Veltink, PhD



• Aim– Investigate hand-opening feedback during

performance of virtual grasping tasks and distractive tasks.

• Relevance– Sensory feedback and the required attentional

demands are important aspects in prosthesis acceptance.



Method• 10 nondisabled subjects

performed virtual grasping tasks: – With and without

feedback about hand opening (8 vibrotactile stimulators on forearm).

– During 3 levels of distraction: none, counting task, count and subtract task.

Experimental setup. Eight coin motors placed in array on forearm.



Results

• Addition of vibrotactile feedback:– Increased performance. – But also increased duration of tasks.

• Only highest level of distraction (count and subtract task) influenced grasping task performance.



Conclusion

• Proposed method to provide hand-opening feedback through array of 8 vibrotactile stimulators was successful. – Performance in grasping task increases and is

not significantly attention demanding.

Documents

This article and any supplementary material should be cited as follows: Witteveen HJ, de Rond L, Rietman JS, Veltink PH. Hand-opening feedback for myoelectric