This article and any supplementary material should be cited as follows: Sharma A, Torres-Moreno R, Zabjek K, Andrysek J. Toward an artificial sensory feedback system for prosthetic mobility rehabilitation: Examination of sensorimotor responses. J Rehabil Res Dev. 2014;51(6):XX–XX.http://dx.doi.org/10.1682/JRRD.2013.07.0164

Slideshow ProjectDOI:10.1682/JRRD.2013.07.0164JSP

Toward an artificial sensory feedback system for prosthetic mobility rehabilitation: Examination of

sensorimotor responses

Aman Sharma, MHSc; Ricardo Torres-Moreno, PhD; Karl Zabjek, PhD; Jan Andrysek, PhD

This article and any supplementary material should be cited as follows: Sharma A, Torres-Moreno R, Zabjek K, Andrysek J. Toward an artificial sensory feedback system for prosthetic mobility rehabilitation: Examination of sensorimotor responses. J Rehabil Res Dev. 2014;51(6):XX–XX.http://dx.doi.org/10.1682/JRRD.2013.07.0164

Slideshow ProjectDOI:10.1682/JRRD.2013.07.0164JSP

• Aim– Examine sensorimotor responses to mobility-relevant

stimuli.

• Relevance– People with lower-limb amputation have reduced mobility

due to loss of sensory information, which may be restored by artificial sensory feedback systems built into prostheses.

– For an effective system, it is important to understand how humans sense, interpret, and respond to the feedback that would be provided.

This article and any supplementary material should be cited as follows: Sharma A, Torres-Moreno R, Zabjek K, Andrysek J. Toward an artificial sensory feedback system for prosthetic mobility rehabilitation: Examination of sensorimotor responses. J Rehabil Res Dev. 2014;51(6):XX–XX.http://dx.doi.org/10.1682/JRRD.2013.07.0164

Slideshow ProjectDOI:10.1682/JRRD.2013.07.0164JSP

Method• Applied stimuli (vibrations) to thigh region.– Responses involved leg movements.

• Performed 3 experiments to examine effects of:– Location of stimuli.– Frequency of stimuli.– Means for providing response.

• Measured:– Reaction time (RT): duration between application of stimulus and

initiation of response.– Response accuracy.

This article and any supplementary material should be cited as follows: Sharma A, Torres-Moreno R, Zabjek K, Andrysek J. Toward an artificial sensory feedback system for prosthetic mobility rehabilitation: Examination of sensorimotor responses. J Rehabil Res Dev. 2014;51(6):XX–XX.http://dx.doi.org/10.1682/JRRD.2013.07.0164

Slideshow ProjectDOI:10.1682/JRRD.2013.07.0164JSP

Results

• Overall average RTs for 1 response option: – 0.808 s.

• Response accuracies: – >90%.

• Higher vibration frequencies in anterior regions of thigh produced fastest RTs.

• RTs increased when participants were given >1 stimulus and response option.

This article and any supplementary material should be cited as follows: Sharma A, Torres-Moreno R, Zabjek K, Andrysek J. Toward an artificial sensory feedback system for prosthetic mobility rehabilitation: Examination of sensorimotor responses. J Rehabil Res Dev. 2014;51(6):XX–XX.http://dx.doi.org/10.1682/JRRD.2013.07.0164

Slideshow ProjectDOI:10.1682/JRRD.2013.07.0164JSP

Conclusion

• Long sensorimotor responses may be limiting factor in development of artificial feedback system for mobility rehabilitation applications.– However, feed-forward techniques could potentially

address these limitations.