Action potential generation in rat slow- and fast-twitch muscles.
نویسندگان
چکیده
منابع مشابه
External potassium and action potential propagation in rat fast and slow twitch muscles.
The role of extracellular K+ concentration in the propagation velocity of action potential was tested in isolated rat skeletal muscles. Different K+ concentrations were produced by KCl additions to extracellular solution. Action potentials were measured extracellularly by means of two annular platinum electrodes. Fibre bundles of m. soleus (SOL), m. extensor digitorum longus (EDL), red (SMR) an...
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Action potentials (APs) were recorded from the extrajunctional membrane of surface fibers of the fast-twitch extensor digitorum longus (extensor) and the slow-twitch soleus muscles of adult rats. APs of the extensor muscle had a significantly faster rate of rise and fall, as well as a shorter duration, than those of the soleus. In addition, the overshoot of APs and the resting membrane potentia...
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Using a single, mechanically skinned fiber approach, we tested the hypothesis that denervation (0 to 50 days) of skeletal muscles that do not overlap in fiber type composition [extensor digitorum longus (EDL) and soleus (SOL) muscles of Long-Evans hooded rats] leads to development of different fiber phenotypes. Denervation (50 day) was accompanied by 1) a marked increase in the proportion of hy...
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Recovery metabolism of fast-twitch extensor digitorum longus (EDL) and slow-twitch soleus (SOL) muscles of the rat has been investigated using fluorometric monitoring of reduction of nicotinamide adenine dinucleotide (NAD). In both EDL and SOL, groups of twitch contractions produced a decrease in fluorescence (oxidation of NADH) which returned to the resting base line after contraction ceased. ...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1995
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1995.sp020821