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Table 2 Comparison of main selectivity study platforms found in literature

From: Advances in selective activation of muscles for non-invasive motor neuroprostheses

Platform Lawrence et al., 2006 [54] O'Dwyer et al., 2006 [56] Popovic et al, 2009 [57] Malesevic et. al, 2010 [58] Malesevic et al, 2012 [59] Schill et al, 2009 [60] Chen et al, 2007 [45] Koutsou et al, 2013 [61] Exell et al, 2013 [62]
Array Electrode Smart Electrode 64-pads 2 x 2 round Actitrode, 24-pads, round INTFES, 16-pads, oval INTFES, 16-pads, oval 2x3 round own electrode array Smartex electrode array FEA, 4x6 round
Electrical stimulator Compex Motion2. 4-channel biphasic asymmetric Neurotech NT2000, 6-channel biphasic asymmetric UNAFET, 4-channel biphasic asymmetric INTEFES, 1-channel with a demultiplexer for 32-pad electrodes monophasic rectangular INTEFES, 1-channel with a demultiplexer for 32-pad electrodes monophasic rectangular MotionStim 8, 8-channel biphasic NM III INTEFES, 1-channel with a demultiplexer for 32-pad electrodes monophasic rectangular Modified Odstock stimulator
Upper Limb functions fingers' flexion Wrist flexion-extension,abduction-aduction, Fingers's flexion Forearm pronation-supination, wrist flexion-extension, abduction-adduction, fingers's flexion-extension wrist flexion-extension, fingers' flexion-extension wrist flexion-extension, fingers' flexion wrist flexion-extension, abduction-adduction Wrist joint, fingers' felxion-extension Forearm pronation-supination, wrist flexion-extension, abduction-adduction, fingers's flexion-extension Wrist joint, fingers' felxion-extension
Sensors miniature load cells bend sensors, accelelometers goniometers goniometers, accelelometers bend sensors bend sensors CyberGlove bend sensors, accelelometers Data glove, twin-axis electrogoniometer
Stimulation Strategy Sequentially activation of pads region during 5 s Sequentially activation of a different combination of pair electrodes during 3 s Sequentially activation of pads during 4 s Single current pulses via each pad, with frequency of 2 Hz. Sequentially activation of pads during 2 s Single current pulses via each pad Sequentially activation of pads Sequentially activation of pads during 2 s Sequentially activation of pads region(blocks)
Pad Selection Automatic, regions with higher forces Automatic, comparison with target movement Automatic, cost function Automatic, ANN Automatic, cost function semi-automatic, cost function non-automatic, pas with higher amount of movement Automatic, cost function Automatic, ILC
Portability NOT Portable Portable portable portable portable portable portable portable portable