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Calcium sensitivity of fast‐and slow‐twitch human muscle fibers
Muscle & Nerve, 1989AbstractMuscle fibers from the lateral gastrocnemius muscles of five normal adult males were chemically skinned (sarcolemma disrupted) and each fiber was divided into two parts for histochemical determination of fiber type and calcium‐induced tension measurements. The calcium concentration associated with half‐maximal tension was 2.5 μM for fast‐twitch
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Muscle Sound Frequency Analysis From Fast And Slow Twitch Muscle
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991, 2005Muscle sounds were recorded from human orbicularis oris and soleus muscles from 5 healthy subjects during isometric contraction. Frequency analysis of the signals revealed distinct power spectra for each muscle type. The peak frequency for soleus was 10.8 +/- 3.1 and for orbicularis oris was 22 +/- 5 Hz.
D. Mealing, P.W. McCarthy
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Myogenic and neurogenic contributions to the development of fast and slow twitch muscles in rat
Developmental Biology, 1978Abstract The histochemical ATPase activity and the myosin light chains of a rat fast muscle (extensor digitorum longus, EDL) and a rat slow muscle (soleus) during development have been investigated. Both muscles initially synthesize fast myosin light chains and show the intense histochemical ATPase activity characteristic of adult fast muscle fibers.
N A, Rubinstein, A M, Kelly
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The transformation of cross-reinnervated slow-twitch muscle after deafferentation in the cat
Experimental Brain Research, 1984Cross-reinnervations were effected between the extensor digitorum longus and soleus muscles in the cat hind limb. At the same time dorsal root section or ganglionectomy was performed over segments L6-S1. Completeness of the deafferentation was subsequently confirmed either by dissection or by dorsal root recording.
A R, Luff, U, Proske, S N, Webb
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Fluorometric studies of recovery metabolism of rat fast- and slow-twitch muscles
American Journal of Physiology-Legacy Content, 1976Recovery 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 ...
I R, Wendt, J B, Chapman
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Caffeine contractures in denervated slow-twitch and fast-twitch muscles of the rat
Experimental Neurology, 1987Caffeine contractures (25 mM) and twitches were registered in vitro (34 degrees C) in normal and denervated soleus and extensor digitorum longus of the rat. Both muscles lost weight progressively after denervation although the loss of weight in soleus muscles was more manifest.
B A, Kotsias +2 more
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Characterisation of isoprenaline myotoxicity on slow-twitch skeletal versus cardiac muscle
International Journal of Cardiology, 2002Elevated catecholamines are known to be cardiotoxic, but their potential injurious effects on skeletal muscles are largely unknown. We have investigated whether isoprenaline induces in vivo myocyte necrosis in rat soleus muscle, and characterised the time-course, dose-response, spatial distribution and adrenoceptor involvement of its myotoxicity, in ...
YeeLan, Ng +5 more
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Energetics of mammalian fast and slow twitch muscles.
Federation proceedings, 1982Myothermic determinations of the energetics of rat fast twitch extensor digitorum longus (EDL) and slow twitch soleus (SOL) reveal that at birth the total energy production is similar but by 41 days postpartum, the total energy production of the EDL is much greater, The higher energy liberation of EDL also exists in the mature mouse. The differences in
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Fatigue and caffeine effects in fast-twitch and slow-twitch muscles of the mouse
Pfl�gers Archiv European Journal of Physiology, 1976In excised, curarized and massively stimulated fast-twitch mouse gastrocnemius muscles the early twitch tension enhancements (treppe) during 1/s activity between 10 and 36 degrees C increase and affect more contractions as temperature increases. Tension output eventually declines at a temperature-independent rate.
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