myofiber


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myofiber

/myo·fi·ber/ (-fi´ber) muscle fiber.

myofiber

(mī″ō-fī′bĕr)
A skeletal muscle cell.

type 1 myofiber

A skeletal muscle cell that has a rich concentration of myoglobin and oxidative enzymes. Also known as “red” or “slow twitch” myofibers, these cells rely principally on aerobic metabolism for energy.

type II myofiber

A skeletal muscle cell with little myoglobin content. Also known as “white” or “fast-twitch” myofibers, these cells rely principally on anaerobic metabolism for energy.

myofiber

muscle fiber.

myofiber hyperplasia
an inherited marked increase in the number of fibers in the muscle masses of affected cattle. There is a corresponding diminution in the amount of fat and connective tissue in the carcass. There is no deleterious effect on the animals except a higher prevalence of dystocia, and some other minor musculoskeletal defects, including elso-heel. Called also culard, doppellender, doppellendigkeit, double muscle.
References in periodicals archive ?
Insufficient fiber growth as a cause of small myofiber size.
Potent myofiber hypertrophy during resistance training in humans is associated with satellite cell-mediated myonuclear addition: A cluster analysis.
The salient common morphological features were : fiber size variability, hypertrophic fibers, increased internalisation of nuclei, opaque fibers, increased endomysial fibrosis, fat metaplasia, inflammation around the necrotic fibers, fiber splitting, regenerative myofibers, roundening of fibers, nuclear chains, myophagocytosis etc.
Effect of arginine on the development of the pectoralis muscle and the diameter and the protein:deoxyribonucleic acid rate of its skeletal myofibers in broilers.
The myofibers containing centralized nuclei in soleus muscles isolated from mice were assessed under high-powered field (200x magnification; five fields per sample).
The increased chamber stiffness is due to structural abnormalities, hypertrophy and myofiber disarray often with interstitial and perivascular fibrosis, with up to eightfold greater amount of matrix collagen compared with normal controls (3,5).
A new function of a previously isolated compound that stimulates activation and differentiation of myogenic precursor cells leading to efficient myofiber regeneration and muscle repair.
Necropsy of one of these calves revealed multifocal, severe, myofiber degeneration and fibrosis during histological inspection of skeletal muscle.
In this study, adult mice lacking miR-133a developed progressive CNM, as well as mitochondrial dysfunction and fast-to-slow myofiber conversion.
BF muscle had higher proportion of type I myofiber (red and oxidative) than beef GM muscle [20], which could be related to the elevated GSH-Px activity.
In ovo exposure to monochromatic green light promotes skeletal muscle cell proliferation and affects myofiber growth in posthatch chicks.
Histopathologic examination of multiple sections of skeletal muscle from the left thigh revealed increased amounts of fibrous connective tissue within the perimysium and diffuse variation in myofiber size (Fig 5).