Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force

Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and c...
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Autor*in:	Rodriguez-Falces, Javier [verfasserIn] Neyroud, Daria [verfasserIn] Place, Nicolas [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2014

Schlagwörter:	Power spectral analysis Median frequency Ramp contractions Step-wise contractions Inter-electrode distance Fibre-type distribution

Übergeordnetes Werk:	Enthalten in: European journal of applied physiology - Berlin : Springer, 1928, 115(2014), 3 vom: 21. Nov., Seite 627-638
Übergeordnetes Werk:	volume:115 ; year:2014 ; number:3 ; day:21 ; month:11 ; pages:627-638

Links:	Volltext

DOI / URN:	10.1007/s00421-014-3041-4

Katalog-ID:	SPR005531829

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245	1	0	\|a Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force
264		1	\|c 2014
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520			\|a Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level.
650		4	\|a Power spectral analysis \|7 (dpeaa)DE-He213
650		4	\|a Median frequency \|7 (dpeaa)DE-He213
650		4	\|a Ramp contractions \|7 (dpeaa)DE-He213
650		4	\|a Step-wise contractions \|7 (dpeaa)DE-He213
650		4	\|a Inter-electrode distance \|7 (dpeaa)DE-He213
650		4	\|a Fibre-type distribution \|7 (dpeaa)DE-He213
700	1		\|a Neyroud, Daria \|e verfasserin \|4 aut
700	1		\|a Place, Nicolas \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t European journal of applied physiology \|d Berlin : Springer, 1928 \|g 115(2014), 3 vom: 21. Nov., Seite 627-638 \|w (DE-627)253722780 \|w (DE-600)1459054-2 \|x 1439-6327 \|7 nnns
773	1	8	\|g volume:115 \|g year:2014 \|g number:3 \|g day:21 \|g month:11 \|g pages:627-638
856	4	0	\|u https://dx.doi.org/10.1007/s00421-014-3041-4 \|z lizenzpflichtig \|3 Volltext
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allfields	10.1007/s00421-014-3041-4 doi (DE-627)SPR005531829 (SPR)s00421-014-3041-4-e DE-627 ger DE-627 rakwb eng 610 ASE 44.37 bkl Rodriguez-Falces, Javier verfasserin aut Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level. Power spectral analysis (dpeaa)DE-He213 Median frequency (dpeaa)DE-He213 Ramp contractions (dpeaa)DE-He213 Step-wise contractions (dpeaa)DE-He213 Inter-electrode distance (dpeaa)DE-He213 Fibre-type distribution (dpeaa)DE-He213 Neyroud, Daria verfasserin aut Place, Nicolas verfasserin aut Enthalten in European journal of applied physiology Berlin : Springer, 1928 115(2014), 3 vom: 21. Nov., Seite 627-638 (DE-627)253722780 (DE-600)1459054-2 1439-6327 nnns volume:115 year:2014 number:3 day:21 month:11 pages:627-638 https://dx.doi.org/10.1007/s00421-014-3041-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.37 ASE AR 115 2014 3 21 11 627-638
spelling	10.1007/s00421-014-3041-4 doi (DE-627)SPR005531829 (SPR)s00421-014-3041-4-e DE-627 ger DE-627 rakwb eng 610 ASE 44.37 bkl Rodriguez-Falces, Javier verfasserin aut Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level. Power spectral analysis (dpeaa)DE-He213 Median frequency (dpeaa)DE-He213 Ramp contractions (dpeaa)DE-He213 Step-wise contractions (dpeaa)DE-He213 Inter-electrode distance (dpeaa)DE-He213 Fibre-type distribution (dpeaa)DE-He213 Neyroud, Daria verfasserin aut Place, Nicolas verfasserin aut Enthalten in European journal of applied physiology Berlin : Springer, 1928 115(2014), 3 vom: 21. Nov., Seite 627-638 (DE-627)253722780 (DE-600)1459054-2 1439-6327 nnns volume:115 year:2014 number:3 day:21 month:11 pages:627-638 https://dx.doi.org/10.1007/s00421-014-3041-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.37 ASE AR 115 2014 3 21 11 627-638
allfields_unstemmed	10.1007/s00421-014-3041-4 doi (DE-627)SPR005531829 (SPR)s00421-014-3041-4-e DE-627 ger DE-627 rakwb eng 610 ASE 44.37 bkl Rodriguez-Falces, Javier verfasserin aut Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level. Power spectral analysis (dpeaa)DE-He213 Median frequency (dpeaa)DE-He213 Ramp contractions (dpeaa)DE-He213 Step-wise contractions (dpeaa)DE-He213 Inter-electrode distance (dpeaa)DE-He213 Fibre-type distribution (dpeaa)DE-He213 Neyroud, Daria verfasserin aut Place, Nicolas verfasserin aut Enthalten in European journal of applied physiology Berlin : Springer, 1928 115(2014), 3 vom: 21. Nov., Seite 627-638 (DE-627)253722780 (DE-600)1459054-2 1439-6327 nnns volume:115 year:2014 number:3 day:21 month:11 pages:627-638 https://dx.doi.org/10.1007/s00421-014-3041-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.37 ASE AR 115 2014 3 21 11 627-638
allfieldsGer	10.1007/s00421-014-3041-4 doi (DE-627)SPR005531829 (SPR)s00421-014-3041-4-e DE-627 ger DE-627 rakwb eng 610 ASE 44.37 bkl Rodriguez-Falces, Javier verfasserin aut Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level. Power spectral analysis (dpeaa)DE-He213 Median frequency (dpeaa)DE-He213 Ramp contractions (dpeaa)DE-He213 Step-wise contractions (dpeaa)DE-He213 Inter-electrode distance (dpeaa)DE-He213 Fibre-type distribution (dpeaa)DE-He213 Neyroud, Daria verfasserin aut Place, Nicolas verfasserin aut Enthalten in European journal of applied physiology Berlin : Springer, 1928 115(2014), 3 vom: 21. Nov., Seite 627-638 (DE-627)253722780 (DE-600)1459054-2 1439-6327 nnns volume:115 year:2014 number:3 day:21 month:11 pages:627-638 https://dx.doi.org/10.1007/s00421-014-3041-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.37 ASE AR 115 2014 3 21 11 627-638
allfieldsSound	10.1007/s00421-014-3041-4 doi (DE-627)SPR005531829 (SPR)s00421-014-3041-4-e DE-627 ger DE-627 rakwb eng 610 ASE 44.37 bkl Rodriguez-Falces, Javier verfasserin aut Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level. Power spectral analysis (dpeaa)DE-He213 Median frequency (dpeaa)DE-He213 Ramp contractions (dpeaa)DE-He213 Step-wise contractions (dpeaa)DE-He213 Inter-electrode distance (dpeaa)DE-He213 Fibre-type distribution (dpeaa)DE-He213 Neyroud, Daria verfasserin aut Place, Nicolas verfasserin aut Enthalten in European journal of applied physiology Berlin : Springer, 1928 115(2014), 3 vom: 21. Nov., Seite 627-638 (DE-627)253722780 (DE-600)1459054-2 1439-6327 nnns volume:115 year:2014 number:3 day:21 month:11 pages:627-638 https://dx.doi.org/10.1007/s00421-014-3041-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.37 ASE AR 115 2014 3 21 11 627-638
language	English
source	Enthalten in European journal of applied physiology 115(2014), 3 vom: 21. Nov., Seite 627-638 volume:115 year:2014 number:3 day:21 month:11 pages:627-638
sourceStr	Enthalten in European journal of applied physiology 115(2014), 3 vom: 21. Nov., Seite 627-638 volume:115 year:2014 number:3 day:21 month:11 pages:627-638
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Power spectral analysis Median frequency Ramp contractions Step-wise contractions Inter-electrode distance Fibre-type distribution
dewey-raw	610
isfreeaccess_bool	false
container_title	European journal of applied physiology
authorswithroles_txt_mv	Rodriguez-Falces, Javier @@aut@@ Neyroud, Daria @@aut@@ Place, Nicolas @@aut@@
publishDateDaySort_date	2014-11-21T00:00:00Z
hierarchy_top_id	253722780
dewey-sort	3610
id	SPR005531829
language_de	englisch
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This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. 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author	Rodriguez-Falces, Javier
spellingShingle	Rodriguez-Falces, Javier ddc 610 bkl 44.37 misc Power spectral analysis misc Median frequency misc Ramp contractions misc Step-wise contractions misc Inter-electrode distance misc Fibre-type distribution Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force
authorStr	Rodriguez-Falces, Javier
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topic_title	610 ASE 44.37 bkl Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force Power spectral analysis (dpeaa)DE-He213 Median frequency (dpeaa)DE-He213 Ramp contractions (dpeaa)DE-He213 Step-wise contractions (dpeaa)DE-He213 Inter-electrode distance (dpeaa)DE-He213 Fibre-type distribution (dpeaa)DE-He213
topic	ddc 610 bkl 44.37 misc Power spectral analysis misc Median frequency misc Ramp contractions misc Step-wise contractions misc Inter-electrode distance misc Fibre-type distribution
topic_unstemmed	ddc 610 bkl 44.37 misc Power spectral analysis misc Median frequency misc Ramp contractions misc Step-wise contractions misc Inter-electrode distance misc Fibre-type distribution
topic_browse	ddc 610 bkl 44.37 misc Power spectral analysis misc Median frequency misc Ramp contractions misc Step-wise contractions misc Inter-electrode distance misc Fibre-type distribution
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title	Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force
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title_full	Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force
author_sort	Rodriguez-Falces, Javier
journal	European journal of applied physiology
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author_browse	Rodriguez-Falces, Javier Neyroud, Daria Place, Nicolas
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author-letter	Rodriguez-Falces, Javier
doi_str_mv	10.1007/s00421-014-3041-4
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title_sort	influence of inter-electrode distance, contraction type, and muscle on the relationship between the semg power spectrum and contraction force
title_auth	Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force
abstract	Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level.
abstractGer	Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level.
abstract_unstemmed	Introduction Spectral frequencies of the surface electromyogram (sEMG) increase with contraction force, but debate still exists on whether this increase is affected by various methodological and anatomical factors. This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. Conclusions In the VL and VM muscles, it is highly unlikely that a particular inter-electrode distance or contraction modality could have prevented the observation of the full extent of the increase in spectral frequencies with increasing force level.
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container_issue	3
title_short	Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force
url	https://dx.doi.org/10.1007/s00421-014-3041-4
remote_bool	true
author2	Neyroud, Daria Place, Nicolas
author2Str	Neyroud, Daria Place, Nicolas
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doi_str	10.1007/s00421-014-3041-4
up_date	2024-07-03T16:59:15.434Z
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This study aimed to investigate the influence of inter-electrode distance (IED) and contraction modality (step-wise vs. ramp) on the changes in spectral frequencies with increasing contraction strength for the vastus lateralis (VL) and vastus medialis (VM) muscles. Methods Twenty healthy male volunteers were assessed for isometric sEMG activity of the VM and VL, with the knee at 90° flexion. Subjects performed isometric ramp contractions in knee extension (6-s duration) with the force gradually increasing from 0 to 80 % MVC. Also, subjects performed 4-s step-wise isometric contractions at 10, 20, 30, 40, 50, 60, 70, and 80 % MVC. Interference sEMG signals were recorded simultaneously at different IEDs: 10, 20, 30, and 50 mm. The mean (Fmean) and median (Fmedian) frequencies and root mean square (RMS) of sEMG signals were calculated. Results For all IEDs, contraction modalities, and muscles tested, spectral frequencies increased significantly with increasing level of force up to 50–60 % MVC force. Spectral indexes increased systematically as IED was decreased. The sensitivity of spectral frequencies to changes in contraction force was independent of IED. The behaviour of spectral indexes with increasing contraction force was similar for step-wise and ramp contractions. 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Influence of inter-electrode distance, contraction type, and muscle on the relationship between the sEMG power spectrum and contraction force

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