Results 171 to 180 of about 13,059 (220)
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Calmitine: A calcium-binding mitochondrial protein specific for fast-twitch muscle fibers
Neuroscience Letters, 1990Mitochondrial fractions were isolated from fast-twitch (EDL), slow-twitch (soleus) and heart muscle of normal rat (WKY). Protein separation by electrophoresis and study of calcium-45 binding showed that a specific calcium protein (designated as calmitine) was present in the mitochondria of fast-twitch muscle but practically inexistent in slow-twitch ...
B Lucas-Heron +2 more
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Adaptation of fibers in fast-twitch muscles of rats to spaceflight and hindlimb suspension
Journal of Applied Physiology, 1992The adaptation of single fibers in medial gastrocnemius (MG), a fast-twitch extensor, and tibialis anterior (TA), a fast-twitch flexor, was studied after 14 days of spaceflight (COSMOS 2044) or hindlimb suspension. Cross-sectional area (CSA) and succinate dehydrogenase (SDH), alpha-glycerophosphate dehydrogenase (GPD), and myofibrillar ...
B, Jiang +6 more
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Glucocorticoid-induced muscle atrophy prevention by exercise in fast-twitch fibers
Journal of Applied Physiology, 1990Exercise has been shown to be effective in preventing glucocorticoid-induced atrophy in muscles containing high proportions of type II or fast-twitch fibers. This investigation was undertaken to further evaluate this response in type IIa and IIb fibers, determined by histochemical staining for myofibrillar adenosinetriphosphatase with alkaline and ...
M T, Falduto +2 more
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Myosin polymorphism in single fibers of chronically stimulated rabbit fast-twitch muscle
Pfl�gers Archiv European Journal of Physiology, 1987Rabbit tibialis anterior (TA) muscles were indirectly stimulated (10 Hz, 24 h/d) for 30 d and 60 d and single fibers were analysed using a combined histochemical and biochemical technique (Staron and Pette 1986, 1987a, b). After 30 d of chronic stimulation there was a pronounced increase in the normally rare (0.5%) C fiber population (i.e., fibers ...
R S, Staron, B, Gohlsch, D, Pette
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Fiber transformation and replacement in low-frequency stimulated rabbit fast-twitch muscles
Cell and Tissue Research, 1996The fast-to-slow conversion of rabbit skeletal muscles by chronic low-frequency (10 Hz, 12 h daily) stimulation involves (1) sequential fast-to-slow fiber-type transitions in the order of type IID-->type IIA-->type I, and (2) the replacement of deteriorating fast-twitch glycolytic fibers by new fibers derived from satellite cells and myotubes.
M, Schuler, D, Pette
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Fine structure of fast‐twitch and slow‐twitch guinea pig muscle fibers
Journal of Morphology, 1973AbstractThe guinea pig soleus muscle is a convenient model for the study of slow‐twitch intermediate (STI) fiber ultrastructure because it is composed entirely of fibers of this class. Such fibers were compared with fast‐twitch red (FTR) and fast‐twitch white (FTW) fibers from the vastus lateralis muscle.FTW fibers are characterized by small, sparse ...
R J, Tomanek +3 more
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Journal of Muscle Research & Cell Motility, 1999
We used double label immunofluorescence and confocal microscopy to examine the organization of beta-spectrin and dystrophin at the sarcolemma of fast twitch myofibers in the Extensor Digitorum Longus (EDL) of the rat. Both beta-spectrin and dystrophin are concentrated in costameres, a rectilinear sarcolemmal array composed of longitudinal strands and ...
M W, Williams, R J, Bloch
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We used double label immunofluorescence and confocal microscopy to examine the organization of beta-spectrin and dystrophin at the sarcolemma of fast twitch myofibers in the Extensor Digitorum Longus (EDL) of the rat. Both beta-spectrin and dystrophin are concentrated in costameres, a rectilinear sarcolemmal array composed of longitudinal strands and ...
M W, Williams, R J, Bloch
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Journal of Strength and Conditioning Research, 2015
A previous study has demonstrated the ability to roughly estimate the percentage of fast-twitch muscle fibers for the vastus lateralis through the analysis of peak torque values during fatiguing isokinetic testing. We examined whether use of the hamstrings influenced peak torque and electromyographic (EMG) responses for the quadriceps during fatiguing ...
Mota, Jacob A. +5 more
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A previous study has demonstrated the ability to roughly estimate the percentage of fast-twitch muscle fibers for the vastus lateralis through the analysis of peak torque values during fatiguing isokinetic testing. We examined whether use of the hamstrings influenced peak torque and electromyographic (EMG) responses for the quadriceps during fatiguing ...
Mota, Jacob A. +5 more
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Calcium transients in single fibers of low-frequency stimulated fast-twitch muscle of rat
American Journal of Physiology-Cell Physiology, 1999Ca2+transients were investigated in single fibers isolated from rat extensor digitorum longus muscles exposed to chronic low-frequency stimulation for different time periods up to 10 days. Approximately 2.5-fold increases in resting Ca2+ concentration ([Ca2+]) were observed 2 h after stimulation onset and persisted throughout the stimulation period ...
S, Carroll, P, Nicotera, D, Pette
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