muscle fiber

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muscle fiber

[′məs·əl ‚fī·bər]
(histology)
The contractile cell or unit of which muscle is composed.
References in periodicals archive ?
The histological sections of skeletal muscle of group B, showed muscle fibers not extending the entire length of the cell depicting the splitting of myofibers. Splitting of some fibers was also observed which appeared as a transverse invagination or complete separation.
Instead of relying on manual assessment by a pathologist alone, the semiautomated digital image analysis approach validated in this work aimed at providing a tool for dystrophin quantification at the myofiber membrane that can generate more-accurate, reproducible, and fully quantitative data.
In sections of H&E at 2 and 4 days after damaging ECC, a number of swollen myofibers with rounded shape and many inflammatory cells surrounding them were observed in the non-Precon group (Figures 1(c) and 1(e)), while these unfavorable changes dramatically were suppressed in the Precon group (Figures 1(d) and 1(f)).
Yoo, "Optimization of human skeletal muscle precursor cell culture and myofiber formation in vitro," Methods, vol.
An improper endoscopic intralesional injection carries the risk of bleeding and myofiber atrophy because TA must be injected in the submucosa.
To detect the myofiber necrosis and regeneration in mice, TA sections were stained with HE.
Ultrastructural examination on muscle confirmed the mitochondrial alterations with mitochondrial hyperplasia and ring cristae, intramitochondrial lipid inclusion, and mitochondria with transversal orientation to the myofiber (Figure 2).
Satellite cells are located beneath the basal lamina that surround each myofiber and act as myogenic precursors for repair following muscle injury with stem cell-like characteristics [7] Several studies have identified various growth factors and cytokines regulating skeletal muscle and nerve development and regeneration [8].
There was marked variation in myofiber size (Figure 1d) along with CD163-positive macrophages located within the perimysium (Figure 1c).
Also myofiber necrosis and muscular fascia inflammation have been found [11].
FGF21 is associated with myogenic differentiation and regulated by myogenic factor MyoD; also, FGF21 is involved in myofiber type transformation [32, 33].
The heart becomes dilated and cardiac cells develop abnormal ion channel gates, leading to abnormal electrical activation, slow electrical conduction, and disarranged calcium activation, which causes ineffective contraction, dyssynchrony of depolarization, and myofiber shortening, among several other effects.