The different intracellular action potentials of fast and slow muscle fibres

Jonge, W. Wallinga-de; Gielen, F.L.H.; Wirtz, Peter; Jong, P. De; Broenink, Johannes F.

doi:10.1016/0013-4694(85)91115-0

Cited by 54 publications

(29 citation statements)

References 19 publications

(22 reference statements)

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“…Indeed, in vivo studies have demonstrated that fast-twitch fibres have higher depolarization and repolarization frequencies than do slow-twitch fibres. This phenomenon produces action potentials of shorter length (22) and would likely contribute to high frequencies of the sEMG spectral analysis. Moreover, the motor unit size of the fasttwitch fibres is generally bigger than the slow-twitch fibres (23).…”

Section: Discussionmentioning

confidence: 99%

Skeletal muscle endurance and muscle metabolism in patients with chronic heart failure

Brassard

Maltais

Noël

et al. 2006

Canadian Journal of Cardiology

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Section: Discussionmentioning

confidence: 99%

Skeletal muscle endurance and muscle metabolism in patients with chronic heart failure

Brassard

Maltais

Noël

et al. 2006

Canadian Journal of Cardiology

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“…The resting membrane potential is more negative in fast than slow fibers in rat (842) and human muscles (670,673), with potential ranges between Ϫ80 and Ϫ85 mV in slow fibers and between Ϫ90 and Ϫ95 mV in fast fibers. The membrane capacitance per unit area is similar in fast and slow fibers: for example, values of 3.82 versus 3.76 F/cm 2 have been calculated in slow and fast human muscle fibers, respectively (673).…”

Section: Ionic Channels and Membrane Excitabilitymentioning

confidence: 97%

Fiber Types in Mammalian Skeletal Muscles

Schiaffino

Reggiani

2011

Physiological Reviews

2,165

2,465

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Mammalian skeletal muscle comprises different fiber types, whose identity is first established during embryonic development by intrinsic myogenic control mechanisms and is later modulated by neural and hormonal factors. The relative proportion of the different fiber types varies strikingly between species, and in humans shows significant variability between individuals. Myosin heavy chain isoforms, whose complete inventory and expression pattern are now available, provide a useful marker for fiber types, both for the four major forms present in trunk and limb muscles and the minor forms present in head and neck muscles. However, muscle fiber diversity involves all functional muscle cell compartments, including membrane excitation, excitation-contraction coupling, contractile machinery, cytoskeleton scaffold, and energy supply systems. Variations within each compartment are limited by the need of matching fiber type properties between different compartments. Nerve activity is a major control mechanism of the fiber type profile, and multiple signaling pathways are implicated in activity-dependent changes of muscle fibers. The characterization of these pathways is raising increasing interest in clinical medicine, given the potentially beneficial effects of muscle fiber type switching in the prevention and treatment of metabolic diseases.

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“…In addition the MU type is not only reflected in mechanical and histological differences but also in the single-fiber action potential and in the MU action potential features. Wallinga et al [102] investigated the action potential of individual muscle fibers of the rat soleus (type I) and the extensor digitorum longus (EDL, predominantly type II). They found that in comparison to type I fibers, type II fibers have more negative resting potential, larger peak excursion, faster rate of depolarization and repolarization and shorter action potential duration.…”

Section: Motor Unitmentioning

confidence: 99%