Results 251 to 260 of about 1,375,049 (303)

Hyperinnervation of Skeletal Muscle Fibers: Dependence on Muscle Activity

Science, 1973
After the motor nerve to the rat soleus muscle was blocked reversibly by local anesthesia, individual muscle fibers became innervated by a transplanted motor nerve without losing their original innervation. Such cross-innervation of the denervated soleus muscle by the same foreign nerve was largely reduced by direct electrical stimulation of the muscle.
J K, Jansen, T, Lomo, K, Nicolaysen, R H, Westgaard   +3 more
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Analysis of the composition of skeletal muscle fibers in skaters' muscles

Bulletin of Experimental Biology and Medicine, 1988
Muscle fibers composition was investigated in vastus lateralis muscles of 103 skaters. In the total population of skaters muscle fibers composition was as follows: muscle fibers, type I--in 54 +/- 2%, muscle fibers, type II A--in 35 +/- 1% and muscle fibers, type II B--in 11 +/- 1%.
V V, Iazvikov, S A, Morozov, A N, Nekrasov   +2 more
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The Adaptive Potential of Skeletal Muscle Fibers

Canadian Journal of Applied Physiology, 2002
Mammalian skeletal muscle fibers display a great adaptive potential. This potential results from the ability of muscle fibers to adjust their molecular, functional, and metabolic properties in response to altered functional demands, such as changes in neuromuscular activity or mechanical loading.
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Calcium sparks in skeletal muscle fibers

Cell Calcium, 2005
Ca(2+) sparks monitor transient local releases of Ca(2+) from the sarcoplasmic reticulum (SR) into the myoplasm. The release takes place through ryanodine receptors (RYRs), the Ca(2+)-release channels of the SR. In intact fibers from frog skeletal muscle, the temporal and spatial properties of voltage-activated Ca(2+) sparks are well simulated by a ...
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Effects of myotoxins on skeletal muscle fibers

Progress in Neurobiology, 1995
This review highlights various aspects of a number of experimental myological alterations, induced by different chemical toxicants, including anticholinesterase, colchicine, vincristine, chloroquine, tetanus toxin, botulinum toxin, reserpine and emetine.
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Junctional and extrajunctional acetylcholinesterase in skeletal muscle fibers

Chemico-Biological Interactions, 2005
The asymmetric A12 acetylcholinesterase (AChE) molecular form, consisting of three tetrameric catalytic oligomers and three non-catalytic subunits of collagen Q (ColQ), is the functional AChE form in the neuromuscular junction. Its extremely high concentration and sharp localization in the junction is mostly due to the binding of this AChE form to ...
Neva, Crne-Finderle, Peter, Pregelj, Janez, Sketelj   +2 more
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Intracellular bicarbonate in single skeletal muscle fibers

Pfl�gers Archiv European Journal of Physiology, 1974
This is the first direct potentiometric determination of intracellular bicarbonate concentration. The new method involves the use of a double-barrelled HCO3 −-selective liquid ion-exchange microelectrode that permits the simultaneous determination of intracellular [HCO3 −] and membrane PD of single cells.
R N, Khuri, K K, Bogharian, S K, Agulian
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Sarcomeric Oscillations in Frog Skeletal Muscle Fibers

Science, 1968
Brief asynchronous, small-amplitude, cyclic, longitudinal displacements of the striations of frog skeletal muscle fibers were observed with ordinary light microscopy after application of caffeine and certain quaternary ammonium compounds. With time these oscillations became synchronized and evolved into peristaltic-like movements. The oscillations were
L A, Marco, W L, Nastuk
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The skeletal muscle fiber: a mechanically sensitive cell

European Journal of Applied Physiology, 2019
The plasticity of skeletal muscle, whether an increase in size, change in metabolism, or alteration in structural properties, is in a continuous state of flux largely dependent upon physical activity. Much of the past research has expounded upon these ever-changing aspects of the muscle fiber following exercise.
Luke A. Olsen, Justin X. Nicoll, Andrew C. Fry   +2 more
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Capillaries within Human Skeletal Muscle Fibers

Pathology - Research and Practice, 1991
Internalized capillaries, i.e. capillaries within muscle fibers, represent a rare myopathological feature. This was systematically studied in 923 muscle biopsy specimens and found in 24, chiefly in the gastrocnemius muscle, more rarely in the biceps and quadriceps muscles affecting males more often than females and most frequently associated with ...
R, Wolf, H H, Goebel, L, Gutmann, S, Schochet   +3 more
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