In this section
@article{Štrbac:2016:4/046014,
author = {trbac, M and Beli, M and Isakovi, M and Koji, V and Bijeli, G and Popovi, I and Radoti, M and Doen, S and Markovi, M and Farina, D and Keller, T},
doi = {4/046014},
journal = {Journal of Neural Engineering},
title = {Integrated and flexible multichannel interface for electrotactile stimulation},
url = {http://dx.doi.org/10.1088/1741-2560/13/4/046014},
volume = {13},
year = {2016}
}
TY - JOUR
AB - © 2016 IOP Publishing Ltd. Objective. The aim of the present work was to develop and test a flexible electrotactile stimulation system to provide real-time feedback to the prosthesis user. The system requirements were to accommodate the capabilities of advanced multi-DOF myoelectric hand prostheses and transmit the feedback variables (proprioception and force) using intuitive coding, with high resolution and after minimal training. Approach. We developed a fully-programmable and integrated electrotactile interface supporting time and space distributed stimulation over custom designed flexible array electrodes. The system implements low-level access to individual stimulation channels as well as a set of high-level mapping functions translating the state of a multi-DoF prosthesis (aperture, grasping force, wrist rotation) into a set of predefined dynamic stimulation profiles. The system was evaluated using discrimination tests employing spatial and frequency coding (10 able-bodied subjects) and dynamic patterns (10 able-bodied and 6 amputee subjects). The outcome measure was the success rate (SR) in discrimination. Main results. The more practical electrode with the common anode configuration performed similarly to the more usual concentric arrangement. The subjects could discriminate six spatial and four frequency levels with SR > 90% after a few minutes of training, whereas the performance significantly deteriorated for more levels. The dynamic patterns were intuitive for the subjects, although amputees showed lower SR than able-bodied individuals (86% 10% versus 99% 3%). Significance. The tests demonstrated that the system was easy to setup and apply. The design and resolution of the multipad electrode was evaluated. Importantly, the novel dynamic patterns, which were successfully tested, can be superimposed to transmit multiple feedback variables intuitively and simultaneously. This is especially relevant for closing the loop in modern multifunction prost
AU - trbac,M
AU - Beli,M
AU - Isakovi,M
AU - Koji,V
AU - Bijeli,G
AU - Popovi,I
AU - Radoti,M
AU - Doen,S
AU - Markovi,M
AU - Farina,D
AU - Keller,T
DO - 4/046014
PY - 2016///
SN - 1741-2560
TI - Integrated and flexible multichannel interface for electrotactile stimulation
T2 - Journal of Neural Engineering
UR - http://dx.doi.org/10.1088/1741-2560/13/4/046014
VL - 13
ER -