Relationship between Muscle Fiber Conduction Velocity and the Force-time
Curve during Muscle Twitches |
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| Authors: | Kenichi Murakami Hiroyuki Fujisawa Jun Onobe Yoichiro Sato |
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| Affiliation: | 1) Tohoku Bunka Gakuen University, Japan;2) Graduate School of Health and Environment Sciences, Tohoku Bunka Gakuen University, Japan;3) Graduate School of Health and Environment Sciences, Hokkaido University, Japan |
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| Abstract: | [Purpose] The aim of this study was to clarify the relationship between the muscle fiberconduction velocity (MFCV) obtained during muscle twitches from evoked potentials and thedynamic characteristics of muscular tension (muscle dynamic characteristics) bymanipulating deep temperature. [Subjects] Subjects were 10 healthy adult men. Their meanage was 23.0 ± 3.9 years. [Methods] Measurement items were MFCV of the right tibialisanterior muscle and the force-time curve of right ankle dorsiflexion (muscle twitch).Measurements were made under conditions of ordinary (room) temperature, hot and cold. Therate of change in maximum torque was calculated from the force-time curve. [Results] Inall subjects, MFCV increased significantly with heating and decreased significantly withcooling. A strong correlation was seen between MFCV and deep temperature. A strongcorrelation was also seen between MFCV and the rate of change in maximum torque. Strongercorrelations were seen in the present results than in previous studies that conductedinvestigations using voluntary contractions. [Conclusion] The present results were notaffected by psychological or other such factors, and are valuable as data with highphysiological reliability. In conclusion, this study was able to clarify the relationshipbetween MFCV from evoked potentials and muscle dynamic characteristics.Key words: Muscle fiber conduction velocity, Dynamic characteristics of muscular tension, Muscle twitches |
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