Muscle excitability during sustained maximal voluntary contractions by a separate analysis of the M‐wave phases
This study was designed to examine separately the changes in the first and second phases of the muscle compound action potential (M‐wave) during and after a sustained 3‐minutes maximal voluntary contraction (MVC). M‐waves were evoked by supramaximal single shocks to the femoral nerve given at 10‐sec...
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| Veröffentlicht in: | Scandinavian journal of medicine & science in sports 2017-12, Vol.27 (12), p.1761-1775 |
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| description | This study was designed to examine separately the changes in the first and second phases of the muscle compound action potential (M‐wave) during and after a sustained 3‐minutes maximal voluntary contraction (MVC). M‐waves were evoked by supramaximal single shocks to the femoral nerve given at 10‐seconds intervals throughout a sustained isometric 3‐minutes MVC and also during six brief MVCs performed throughout a 30‐minutes recovery period. The amplitude, duration, and area of the M‐wave first and second phases, together with muscle conduction velocity and force, were measured. During the 3‐minutes MVC, the amplitude of the first phase increased progressively for the first minute (33%‐43%, P |
| doi_str_mv | 10.1111/sms.12819 |
| format | Article |
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M‐waves were evoked by supramaximal single shocks to the femoral nerve given at 10‐seconds intervals throughout a sustained isometric 3‐minutes MVC and also during six brief MVCs performed throughout a 30‐minutes recovery period. The amplitude, duration, and area of the M‐wave first and second phases, together with muscle conduction velocity and force, were measured. During the 3‐minutes MVC, the amplitude of the first phase increased progressively for the first minute (33%‐43%, P<.01) and remained stable thereafter, whereas the second phase initially increased for 25‐35 seconds (30%‐50%, P<.01), but subsequently decreased significantly before stabilizing. During the recovery period, the amplitude of the M‐wave first phase showed a decreasing trend, returning to pre‐fatigue values (P>.01) within 5‐10 minutes, while the second phase increased progressively and remained higher than control (7%‐20%, P<.01) after the 30‐minutes recovery time. Maximal cross‐correlations between the time course of the first phase amplitude and those of conduction velocity and force (0.9‐0.93) occurred for a lag of 0 seconds, whereas maximal cross‐correlations corresponding to the second‐phase amplitude (0.6‐0.7) occurred for a 50‐seconds time lag. The present findings indicate that the potentiation of the first phase results from impaired muscle membrane excitability. The peak‐to‐peak amplitude and second‐phase amplitude are not valid indicators of muscle excitability as they might be critically affected by muscle architectural features.</description><identifier>ISSN: 0905-7188</identifier><identifier>EISSN: 1600-0838</identifier><identifier>DOI: 10.1111/sms.12819</identifier><identifier>PMID: 28028847</identifier><language>eng</language><publisher>Denmark: Blackwell Publishing Ltd</publisher><subject>Adult ; Anatomy & physiology ; conduction velocity ; Electric Stimulation ; Electromyography ; Evoked Potentials, Motor - physiology ; Femoral Nerve - physiology ; femoral nerve stimulation ; Humans ; isometric ; Isometric Contraction - physiology ; Male ; muscle excitability ; Muscle function ; M‐wave ; quadriceps ; Quadriceps Muscle - physiology ; Young Adult</subject><ispartof>Scandinavian journal of medicine & science in sports, 2017-12, Vol.27 (12), p.1761-1775</ispartof><rights>2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd</rights><rights>2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.</rights><rights>Copyright © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4199-5a84564e05884238b471c3f6a1f721c56e6d92d9e4b271e4d14e912f1077d32d3</citedby><cites>FETCH-LOGICAL-c4199-5a84564e05884238b471c3f6a1f721c56e6d92d9e4b271e4d14e912f1077d32d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fsms.12819$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fsms.12819$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,778,782,1414,27907,27908,45557,45558</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28028847$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Rodriguez‐Falces, J.</creatorcontrib><creatorcontrib>Place, N.</creatorcontrib><title>Muscle excitability during sustained maximal voluntary contractions by a separate analysis of the M‐wave phases</title><title>Scandinavian journal of medicine & science in sports</title><addtitle>Scand J Med Sci Sports</addtitle><description>This study was designed to examine separately the changes in the first and second phases of the muscle compound action potential (M‐wave) during and after a sustained 3‐minutes maximal voluntary contraction (MVC). M‐waves were evoked by supramaximal single shocks to the femoral nerve given at 10‐seconds intervals throughout a sustained isometric 3‐minutes MVC and also during six brief MVCs performed throughout a 30‐minutes recovery period. The amplitude, duration, and area of the M‐wave first and second phases, together with muscle conduction velocity and force, were measured. During the 3‐minutes MVC, the amplitude of the first phase increased progressively for the first minute (33%‐43%, P<.01) and remained stable thereafter, whereas the second phase initially increased for 25‐35 seconds (30%‐50%, P<.01), but subsequently decreased significantly before stabilizing. During the recovery period, the amplitude of the M‐wave first phase showed a decreasing trend, returning to pre‐fatigue values (P>.01) within 5‐10 minutes, while the second phase increased progressively and remained higher than control (7%‐20%, P<.01) after the 30‐minutes recovery time. Maximal cross‐correlations between the time course of the first phase amplitude and those of conduction velocity and force (0.9‐0.93) occurred for a lag of 0 seconds, whereas maximal cross‐correlations corresponding to the second‐phase amplitude (0.6‐0.7) occurred for a 50‐seconds time lag. The present findings indicate that the potentiation of the first phase results from impaired muscle membrane excitability. The peak‐to‐peak amplitude and second‐phase amplitude are not valid indicators of muscle excitability as they might be critically affected by muscle architectural features.</description><subject>Adult</subject><subject>Anatomy & physiology</subject><subject>conduction velocity</subject><subject>Electric Stimulation</subject><subject>Electromyography</subject><subject>Evoked Potentials, Motor - physiology</subject><subject>Femoral Nerve - physiology</subject><subject>femoral nerve stimulation</subject><subject>Humans</subject><subject>isometric</subject><subject>Isometric Contraction - physiology</subject><subject>Male</subject><subject>muscle excitability</subject><subject>Muscle function</subject><subject>M‐wave</subject><subject>quadriceps</subject><subject>Quadriceps Muscle - physiology</subject><subject>Young Adult</subject><issn>0905-7188</issn><issn>1600-0838</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp10ctu1TAQBmALUdFDYcELIEtsYJHWt8T2ElXcpB6xKKwjx5lQV05y6nHaZscj8Iw8CS6ndIHU2Xjz6ZdnfkJecXbMy5zgiMdcGG6fkA1vGKuYkeYp2TDL6kpzYw7Jc8RLxri2qn5GDoVhwhilN-Rqu6CPQOHWh-y6EENeab-kMP2guGB2YYKeju42jC7S6zkuU3ZppX6ecnI-h3lC2q3UUYSdSy4DdZOLKwak80DzBdDt75-_btw10N2FQ8AX5GBwEeHl_XtEvn_88O30c3X29dOX0_dnlVfc2qp2RtWNAlaXjwppOqW5l0Pj-KAF93UDTW9Fb0F1QnNQPVdguRg407qXopdH5O0-d5fmqwUwt2NADzG6CeYFW25qqZU0sin0zX_0cl5SWaMo21grpFS2qHd75dOMmGBod6lcJa0tZ-1dD23pof3bQ7Gv7xOXboT-Qf47fAEne3ATIqyPJ7Xn2_N95B_snpNU</recordid><startdate>201712</startdate><enddate>201712</enddate><creator>Rodriguez‐Falces, J.</creator><creator>Place, N.</creator><general>Blackwell Publishing Ltd</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TS</scope><scope>K9.</scope><scope>7X8</scope></search><sort><creationdate>201712</creationdate><title>Muscle excitability during sustained maximal voluntary contractions by a separate analysis of the M‐wave phases</title><author>Rodriguez‐Falces, J. ; Place, N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4199-5a84564e05884238b471c3f6a1f721c56e6d92d9e4b271e4d14e912f1077d32d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Adult</topic><topic>Anatomy & physiology</topic><topic>conduction velocity</topic><topic>Electric Stimulation</topic><topic>Electromyography</topic><topic>Evoked Potentials, Motor - physiology</topic><topic>Femoral Nerve - physiology</topic><topic>femoral nerve stimulation</topic><topic>Humans</topic><topic>isometric</topic><topic>Isometric Contraction - physiology</topic><topic>Male</topic><topic>muscle excitability</topic><topic>Muscle function</topic><topic>M‐wave</topic><topic>quadriceps</topic><topic>Quadriceps Muscle - physiology</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rodriguez‐Falces, J.</creatorcontrib><creatorcontrib>Place, N.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Physical Education Index</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><jtitle>Scandinavian journal of medicine & science in sports</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rodriguez‐Falces, J.</au><au>Place, N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Muscle excitability during sustained maximal voluntary contractions by a separate analysis of the M‐wave phases</atitle><jtitle>Scandinavian journal of medicine & science in sports</jtitle><addtitle>Scand J Med Sci Sports</addtitle><date>2017-12</date><risdate>2017</risdate><volume>27</volume><issue>12</issue><spage>1761</spage><epage>1775</epage><pages>1761-1775</pages><issn>0905-7188</issn><eissn>1600-0838</eissn><abstract>This study was designed to examine separately the changes in the first and second phases of the muscle compound action potential (M‐wave) during and after a sustained 3‐minutes maximal voluntary contraction (MVC). M‐waves were evoked by supramaximal single shocks to the femoral nerve given at 10‐seconds intervals throughout a sustained isometric 3‐minutes MVC and also during six brief MVCs performed throughout a 30‐minutes recovery period. The amplitude, duration, and area of the M‐wave first and second phases, together with muscle conduction velocity and force, were measured. During the 3‐minutes MVC, the amplitude of the first phase increased progressively for the first minute (33%‐43%, P<.01) and remained stable thereafter, whereas the second phase initially increased for 25‐35 seconds (30%‐50%, P<.01), but subsequently decreased significantly before stabilizing. During the recovery period, the amplitude of the M‐wave first phase showed a decreasing trend, returning to pre‐fatigue values (P>.01) within 5‐10 minutes, while the second phase increased progressively and remained higher than control (7%‐20%, P<.01) after the 30‐minutes recovery time. Maximal cross‐correlations between the time course of the first phase amplitude and those of conduction velocity and force (0.9‐0.93) occurred for a lag of 0 seconds, whereas maximal cross‐correlations corresponding to the second‐phase amplitude (0.6‐0.7) occurred for a 50‐seconds time lag. The present findings indicate that the potentiation of the first phase results from impaired muscle membrane excitability. The peak‐to‐peak amplitude and second‐phase amplitude are not valid indicators of muscle excitability as they might be critically affected by muscle architectural features.</abstract><cop>Denmark</cop><pub>Blackwell Publishing Ltd</pub><pmid>28028847</pmid><doi>10.1111/sms.12819</doi><tpages>15</tpages></addata></record> |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete |
| subjects | Adult Anatomy & physiology conduction velocity Electric Stimulation Electromyography Evoked Potentials, Motor - physiology Femoral Nerve - physiology femoral nerve stimulation Humans isometric Isometric Contraction - physiology Male muscle excitability Muscle function M‐wave quadriceps Quadriceps Muscle - physiology Young Adult |
| title | Muscle excitability during sustained maximal voluntary contractions by a separate analysis of the M‐wave phases |
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