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Showing 1 to 20 of 20 for “"muscle fiber type"”.
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Examining the Influence of Muscle Fiber Type on Protein Turnover Signaling in Growing Pigs
Postnatal skeletal muscle growth occurs through myonuclear accretion and high protein turnover rate. While fiber type composition of the muscle could affect protein turnover rate, less is known about how fiber type influences the regulation of protein synthesis and degradation signaling pathways. …
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Association of Masseter Muscle PITX2, ENPP1 and ESR1 Expression, Muscle Fiber Type, Temporomandibular Joint Disorders and Subclassifications of Craniofacial Asymmetry
… associations with functional properties in muscle and bone. The objectives of this study are to investigate how PITX2, ENPP1 and ESR1 gene expression associates with four subclassifications of craniofacial asymmetry, temporomandibular disorders and fiber type differences compared between …
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Effects of Lubabegron supplementation on carcass traits, muscle fiber type, proteome profile and meat quality attributes of finished feedlot steers
… (MS), adjusted fat thickness (aFT), longissimus muscle area (LMA), kidney pelvic and heart fat percentage (KPH), and USDA calculated yield grade (YG) were evaluated for all carcasses (N = 2160). No dose x feeding duration (FD) interaction (P > 0.05) was present for any of the characteristics …
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The Influence of Age and Sampling Depth on Muscle Fiber Type Percentages and Enzyme Activities of Equine Middle Gluteal Muscle
The effects of age and sampling depth on histochemical and biochemical properties of equine gluteus medius were examined.
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THE RELATIONSHIP OF BODY COMPOSITION, MUSCLE FUNCTION, AND MUSCLE FIBER TYPE TO LOWER BODY PHYSICAL PERFORMANCE IN OVERWEIGHT AND OBESE OLDER ADULTS
… the relationship of body composition, muscle function and fiber type and lower body physical performance, in overweight and obese older adults.
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Pectoralis muscle of turkey displays divergent function as correlated with meat quality
… by a myriad of biological factors which include muscle fiber type composition and heme protein concentrations. These factors either contribute to or are subject to the biochemical events involved in the conversion of muscle to meat. Subtle deviations in the processing environment can also result …
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K(ATP) channel Kir62 subunit distribution differs between muscles and between fiber types in skeletal muscle
… homeostasis and cytoprotection. In skeletal muscle specifically, the channel has been shown to be involved in cell volume regulation, modulation of glucose uptake, and the prevention of fiber damage and contractile dysfunction during fatigue. The extent of the cytoprotective capabilities of …
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Investigating a non-invasive method for determining muscle fiber composition
… aims to explore a new method for analysis of muscle fiber type, using data collected from weightlifts on a leg press. A dynamic muscle model is developed, which utilizes the Descherevskii kinetic theory in combination with a muscle "matrix" model to predict net muscle contraction forces and …
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Fiber Type-specific Desmin Content in Human Single Muscle Fibers
… have been shown to differ on the basis of fiber type in whole muscle homogenates. The purpose of this study was to compare the content of the intermediate filament protein, desmin, between type I and type IIa single muscle fibers from a mixed muscle in human subjects. Biopsies were taken …
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Whole-Body Metabolic Flexibility is Discordant with Skeletal Muscle Metabolism
… in response to substrate availability. Skeletal muscle (SkM) is a regulator of metabolic flexibility as it is the primary tissue responsible for post-prandial substrate handling, and metabolic inflexibility can be seen in the SkM of individuals with metabolic disease. As Western style diets are …
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Biochemical Basis of Fresh Ham Color Development
… cut surface, especially the semimembranosus (SM) muscle. This variation in fresh ham color, or two-toning, persists through further processing and contributes to production of a less desirable end product. In an attempt to understand the underlying source of this color variation, we evaluated the …
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Expression and Putative Functions of Fibroblast Growth Factor 10 (Fgf10) in Developing and Adult Skeletal Muscles
… studied, the intrinsic mechanisms controlling muscle fiber-type specification and maturation are much less understood. Fibroblast growth factors (Fgfs) are potent regulators of myoblast proliferation and differentiation in vitro. However, their in vivo functions in myogenesis have yet to be …
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The fiber type specific response of single muscle fiber contractile performance to endurance and resistance exercise training in healthy, sedentary adults
It is well documented that human skeletal muscle is highly responsive to exercise training. However, the impact of endurance and resistance exercise training on single muscle fiber (SMF) physiology has not been well studied in healthy, sedentary individuals. The current study documented the fiber …
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Critical analysis of techniques for normalising electromyographic data : from laboratory to clinical research
Measurements of muscle activity derived from surface EMG electrodes are variable due to both intrinsic and extrinsic factors. The intrinsic factors are endogenous in nature (features within the body) and include muscle fiber type, muscle fiber diameter and length, the amount of tissue between …
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Effects of emphysema and chronic hypoxemia on skeletal muscle oxygen supply and demand
Skeletal muscle dysfunction in chronic obstructive pulmonary disease (COPD) is a condition in which peripheral skeletal muscle undergoes myopathic changes which impair muscle function, limit physical performance, and can lead to significant disability. While the etiology of the dysfunction is …
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Effects of Extrinsic and Intrinsic Factors on Meat Quality and Muscle Biology of Livestock
… most common factors to improve meat quality and muscle growth. The objective of this thesis is to perform a horizontal comparison of the effects of crude protein levels, breeds, and topsoil on the growth performance, muscle development, and meat quality of livestock, and also a longitudinal …
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The Impacts of Intramuscular Fat Content and Other Biochemical Attributes of Fresh Pork Loins on Sensory Characteristics
… improves sensory properties within a single genotype. Loins were collected from pigs to range from 1% to 8% marbling while holding as many other factors as possible constant. Regression analysis was used to determine the effects of increasing fat level and R 2 values did not exceed 0.13 for any …
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Effect of increased carcass weight on fresh pork quality and sensory traits
… 30% of the population. Myosin heavy chain fiber type determination was completed on 49 carcasses. Slopes of regression lines and coefficients of determination between HCW and quality traits were calculated using the REG procedure in SAS and considered significantly different from 0 at P ≤ …
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Role of SH3 and Cysteine-Rich Domain 3 (STAC3) in Skeletal Muscle Development, Postnatal Growth and Contraction
… gene is expressed specifically in skeletal muscle and essential for skeletal muscle contraction and postnatal life in mice. In this dissertation project, I conducted two studies to further understand the role of STAC3 in skeletal muscle development, growth, and contraction. In the first …
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Vulnerability of ex vivo α-motor nerve terminals to hypoxia-reperfusion injury.
… system was generated in which ex vivo skeletal muscle preparations could be maintained in an hypoxic environment, at an O2 concentration below in vivo normoxic values (<0.25% O2), for 2hr followed by 2hr reperfusion (2H-2R). Using this model system combined with quantitative assessment of …