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dc.contributor.author
Laubacher, Marco
dc.contributor.author
Aksöz, Efe A.
dc.contributor.author
Binder-Macleod, Stuart
dc.contributor.author
Hunt, Kenneth J.
dc.date.accessioned
2019-11-12T10:40:16Z
dc.date.available
2017-06-12T08:57:23Z
dc.date.available
2019-11-12T10:40:16Z
dc.date.issued
2016
dc.identifier.issn
2037-7452
dc.identifier.issn
2037-7460
dc.identifier.other
10.4081/ejtm.2016.6016
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/118287
dc.identifier.doi
10.3929/ethz-b-000118287
dc.description.abstract
Spatially distributed sequential stimulation (SDSS) has demonstrated substantial power output and fatigue benefits compared to single electrode stimulation (SES) in the application of functional electrical stimulation (FES). This asymmetric electrode setup brings new possibilities but also new questions since precise placement of the electrodes is one critical factor for good muscle activation. The aim of this study was to compare the power output, fatigue and activation properties of proximally versus distally placed SDSS electrodes in an isokinetic knee extension task simulating knee movement during recumbent cycling. M. vastus lateralis and medialis of seven able-bodied subjects were stimulated with rectangular bi-phasic pulses of constant amplitude of 40 mA and at an SDSS frequency of 35 Hz for 6 min on both legs with both setups (i.e. n=14). Torque was measured during knee-extension movement by a dynamometer at an angular velocity of 110 deg/s. Mean power, peak power and activation time were calculated and compared for the initial and final stimulation phases, together with an overall fatigue index. Power output values (Pmean, Ppeak) were scaled to a standardised reference input pulse width of 100 μs (Pmean,s, Ppeak,s). The initial evaluation phase showed no significant differences between the two setups for all outcome measures. Ppeak and Ppeak,s were both significantly higher in the final phase for the distal setup (25.4 ± 8.1 W vs. 28.2 ± 6.2 W, p=0.0062 and 34.8 ± 9.5 W vs. 38.9 ± 6.7 W, p=0.021, respectively). With distal SDSS, there was modest evidence of higher Pmean and Pmean,s (p=0.071, p=0.14, respectively) but of longer activation time (p=0.096). The rate of fatigue was similar for both setups. For practical FES applications, distal placement of the SDSS electrodes is preferable.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Pagepress
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc/4.0/
dc.subject
functional electrical stimulation
en_US
dc.subject
spatially distributed sequential stimulation
en_US
dc.subject
Knee dynamometer
en_US
dc.subject
Fes cycling
en_US
dc.title
Comparison of proximally versus distally placed spatially distributed sequential stimulation electrodes in a dynamic knee extension task
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 4.0 International
dc.date.published
2016-06-13
ethz.journal.title
European Journal of Translational Myology
ethz.journal.volume
26
en_US
ethz.journal.issue
2
en_US
ethz.pages.start
110
en_US
ethz.pages.end
115
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Pavia
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-12T08:59:02Z
ethz.source
ECIT
ethz.identifier.importid
imp5936548a2272466625
ethz.ecitpid
pub:180236
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-14T14:36:28Z
ethz.rosetta.lastUpdated
2019-11-12T10:40:27Z
ethz.rosetta.versionExported
true
ethz.COinS
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