TWITCH POTENTIATION INDUCED BY TWO DIFFERENT MODALITIES OF NEUROMUSCULAR ELECTRICAL STIMULATION: IMPLICATIONS FOR MOTOR UNIT RECRUITMENT

被引：17

作者：

Dias Da Silva, Sarah Regina ^{[1
]}

Neyroud, Daria ^{[2
]}

Maffiuletti, Nicola A. ^{[3
]}

Gondin, Julien ^{[4
]}

Place, Nicolas ^{[5
]}

机构：

[1] Univ Sao Paulo, Sch Phys Educ & Sport, BR-14049 Ribeirao Preto, Brazil

[2] Univ Geneva, Inst Movement Sci & Sports Med, Geneva, Switzerland

[3] Schulthess Clin, Neuromuscular Res Lab, Zurich, Switzerland

[4] Aix Marseille Univ, CNRS, CRMBM, UMR 7339, Marseille, France

[5] Univ Lausanne, Inst Sport Sci, Fac Biol & Med, Quartier UNIL Mouline, CH-1015 Lausanne, Switzerland

来源：

MUSCLE & NERVE | 2015年 / 51卷 / 03期

关键词：

frequency; NMES; plantar flexors; pulse width; twitch potentiation; LIGHT-CHAIN PHOSPHORYLATION; KNEE EXTENSOR MUSCLES; VOLUNTARY ISOMETRIC CONTRACTIONS; PLATEAU-LIKE BEHAVIOR; POSTACTIVATION POTENTIATION; TRICEPS SURAE; QUADRICEPS FEMORIS; TORQUE DEVELOPMENT; HUMAN MOTONEURONS; SKELETAL-MUSCLE;

D O I：

10.1002/mus.24315

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Introduction: We tested the hypothesis that twitch potentiation would be greater following conventional (CONV) neuromuscular electrical stimulation (50-mu s pulse width and 25-Hz frequency) compared with wide-pulse high-frequency (WPHF) neuromuscular electrical stimulation (1-ms, 100-Hz) and voluntary (VOL) contractions, because of specificities in motor unit recruitment (random in CONV vs. random and orderly in WPHF vs. orderly in VOL). Methods: A single twitch was evoked by means of tibial nerve stimulation before and 2 s after CONV, WPHF, and VOL conditioning contractions of the plantar flexors (intensity: 10% maximal voluntary contraction; duration: 10 s) in 13 young healthy subjects. Results: Peak twitch increased (P<0.05) after CONV (+4.5 +/- 4.0%) and WPHF (+3.3 +/- 5.9%), with no difference between the 2 modalities, whereas no changes were observed after VOL (+0.8 +/- 2.6%). Conclusions: Our results demonstrate that presumed differences in motor unit recruitment between WPHF and CONV do not seem to influence twitch potentiation results. Muscle Nerve 51: 412-418, 2015

引用

页码：412 / 418

页数：7

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