Relationship between nerve and muscle fiber conduction velocities of the same motor unit in man

Okajima, Yasutomo; Toikawa, Hiroyuki; Hanayama, Kohzoh; Ohtsuka, Tomoyoshi; Kimura, Akio; Chino, Naoichi

doi:10.1016/s0304-3940(98)00590-4

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…VRF with Doublet Stimulation. The estimated values for average muscle fiber CV from the CMAP accorded with previous reports, 21,22 although the CV of CMAP is the average of all activated fibers and might be biased by the contribution of fibers lying close to the surface recording electrode. For subjects showing subnormal CV the baseline value was reached at an ISI in the range of 4 -6 ms.…”

Section: Discussionsupporting

confidence: 89%

Velocity recovery function of the compound muscle action potential assessed with doublet and triplet stimulation

Kamavuako¹,

Hennings²,

Farina³

2007

Muscle and Nerve

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Normative values of muscle fiber conduction velocity depend on the conditions in which conduction velocity is measured due to the velocity recovery function (VRF) of muscle fibers. In this study the VRF of the compound muscle action potential (CMAP) was assessed following doublet and triplet stimulation in order to investigate the effect of repetitive muscle activation on muscle fiber conduction velocity. The VRF from doublet and triplet activation showed a peak of 4.6%-15.0% and 6.4%-25.9%, respectively, which is not significantly different. The VRF of the CMAP with doublet stimulation had a plateau between 25-75 ms, similar to that reported for single muscle fibers, and changed as a consequence of previous activation. The VRFs with doublet and triplet stimulation were different for interstimulus intervals in the range of 12-250 ms, where the triplet resulted in a plateau of supernormal conduction velocity. The VRF of the triplet could be explained by linear summation of the effects from doublet stimulations only for small distances between the two conditioning stimuli. These results provide new information on the adaptation of membrane properties of muscle fibers to repetitive activation. Changes in CMAP properties due to repeated activation may influence the accuracy of techniques based on CMAP recordings, such as collision methods.

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Section: Discussionsupporting

confidence: 89%

Velocity recovery function of the compound muscle action potential assessed with doublet and triplet stimulation

Kamavuako¹,

Hennings²,

Farina³

2007

Muscle and Nerve

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show abstract

“…The estimated values for average muscle fiber conduction velocity from the CMAP are in agreement with previous reports 6, 21, 22. Subjects with subnormal CV reached baseline CV at an ISI of 6 ms, which is in agreement with results reported in other studies 2, 6.…”

Section: Discussionsupporting

confidence: 92%

Time‐dependent effects of pre‐conditioning activation on muscle fiber conduction velocity and twitch torque

Kamavuako¹,

Farina²

2010

Muscle and Nerve

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In this study we investigate the range of interstimulus intervals influencing the recovery functions for conduction velocity (velocity recovery function, or VRF) and twitch torque (twitch torque recovery function, or TRF) of muscle fibers. We studied the tibialis anterior muscle of 8 healthy men by varying the time interval between a pair of stimuli in the range of 4-1000 ms, with (triplet) and without (doublet) a preconditioning stimulus. For triplet stimulations, the interval between the first and second stimulus or between the second and third stimulus was fixed, and the other interval was varied. VRF and TRF were influenced by a preconditioning stimulus only when it was delivered within 125 ms and 30 ms, respectively, before the doublet stimulation. The results provide evidence of the range of preconditioning intervals influencing the VRF and TRF; this is relevant for understanding the mechanisms of force generation and for standardizing compound action potential measurements.

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“…Physiological applications of HD-sEMG (Arendt-Nielsen et al, 1992;Cescon et al, 2006;Christova et al, 1999;Falla and Farina, 2005;Farina et al, 2004bFarina et al, , 2005aGerilovsky et al, 1991;Hanayama, 1994;Holtermann et al, 2005b;Houtman et al, 2003;Kleine et al, 2000b;Maisetti et al, 2002;Masuda et al, 2001Masuda et al, , 1983aMasuda and Sadoyama, 1987;Masuda and DeLuca, 1991;Nishizono et al, 1989Nishizono et al, , 1990Okajima et al, 1998;Sadoyama et al, 1988;Saitou et al, 2000;Sbriccoli et al, 2003;Schulte et al, 2004aSchulte et al, , 2006aRoeleveld et al, 2000;Zwarts, 1989) Review: (Roeleveld and Stegeman, 2002;Rau et al, 2004) HD-sEMG applied to anal sphincter muscle: Review: Enck et al, 2004) HD-sEMG applied to facial muscles: (Castroflorio et al, 2005a;Castroflorio et al, 2005b;Geister et al, 1980;Iwasaki et al, 1990;Konno et al, 2005;Lapatki et al, 2006;Tokunaga et al, 1998;Tokunaga et al, 1991) Table 1 Overview of the search terms and strategy PubMed (surface emg AND (mfcv OR muscle fiber conduction velocity) AND patients) OR (surface emg AND clinical applications) OR (channel surface emg AND neuromuscular disorders) OR hsr-emg OR surface electrode-array EMG OR surface electrode-array electromyogram OR surface EMG multi-electrode) OR (multichannel AND ''surface electromyography'') OR multi-channel surface emg OR multi-ch...…”

Section: IImentioning

confidence: 99%

Clinical applications of high-density surface EMG: A systematic review

Drost

Stegeman

Engelen

et al. 2006

Journal of Electromyography and Kinesiology

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160

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Relationship between nerve and muscle fiber conduction velocities of the same motor unit in man

Cited by 10 publications

References 11 publications

Velocity recovery function of the compound muscle action potential assessed with doublet and triplet stimulation

Velocity recovery function of the compound muscle action potential assessed with doublet and triplet stimulation

Time‐dependent effects of pre‐conditioning activation on muscle fiber conduction velocity and twitch torque

Clinical applications of high-density surface EMG: A systematic review

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