On the Concept of Postural Muscles and Posture in Man

Janda, Vladimír

doi:10.1016/s0004-9514(14)60665-6

Cited by 79 publications

(42 citation statements)

References 2 publications

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“…This adaption to life in the wild might be reflected in the myofiber composition of the skeletal muscle, such that a higher proportion of type II fibers are needed. This is in accordance with the functional differences of type I and II myofibers; type I myofiber-rich muscle is highly oxidative and is adapted to perform for long durations and has low energy consumption (Janda, 1983). Conversely, muscles with a higher proportion of type II myofibers are better adapted for movement (Ng et al, 1998).…”

Section: Analysis Of Myofiber Ratiosupporting

confidence: 76%

Hypoxia-related gene expression in porcine skeletal muscle tissues at different altitude

Zhang

Chen

et al. 2015

Genet. Mol. Res.

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ABSTRACT. Hypoxia influences many physiological processes, such as respiration, cardiovascular, neurophysiology, and digestion. Skeletal muscle is an important motor organ, which relies on oxygen of oxidation; however, the study of hypoxia in skeletal muscle is lacking. In order to understand the effect of hypoxia on skeletal muscle, we determined the expression level of four hypoxia-related genes (ADAM17, ARG2, MMP, and HIF1A) in two distinct skeletal muscle tissues from Tibetan pigs that live at different altitudes (500 and 3650 m). Consistent with the well-characterized role of four hypoxia-related genes in the adaptation to high altitude, we found that, compared with the plain pigs, the plateau pigs had higher mRNA abundances of the four genes and lower myofiber ratio in skeletal muscle. The negative correlation between the myofiber ratio and mRNA abundance of the four hypoxia-related genes highlights their critical roles in skeletal 11588 J. Zhang et al. ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (3): 11587-11593 (2015) muscle. These findings may be important for understanding skeletal muscle adaptation to high altitude and hypoxia-related muscle diseases in humans.

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Section: Analysis Of Myofiber Ratiosupporting

confidence: 76%

Hypoxia-related gene expression in porcine skeletal muscle tissues at different altitude

Zhang

Chen

et al. 2015

Genet. Mol. Res.

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“…Muscles can be categorised functionally as postural (or tonic) and locomotory (or phasic) based on whether they have more MFT-I (slow twitch) or MFT-II (fast twitch) fibres respectively [3]. MFT-I rich muscle is highly oxidative and functions to perform long duration and low energy consumption, postural type work more involved in upholding and maintaining the position rather than the actual movement [5][6][7]. Muscles with a higher MFT-II proportion are more involved in producing movement or locomotion [6].…”

Section: Introductionmentioning

confidence: 99%

Muscle Fibre Type Distribution of the Thoracolumbar and Hindlimb Regions of Horses: Relating Fibre Type and Functional Role

Hyytiäinen

Mykkänen

Hielm‐Björkman

et al. 2014

Equine Veterinary Journal

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Background: Although the majority of equine muscles have a mixed fibre type distribution indicative of diverse functional roles, the predominance of a fibre type can indicate the primary function of a muscle. The deep epaxial musculature has an important role in core spinal stability in humans, reflected as a predominantly muscle fibre type (MFT) I or postural fibre type. The fibre type of the deep epaxial musculature has not been determined in horses. The objective of the study was to determine the MFT distribution in selected muscles of thoracolumbar and hindlimb region of horses. This included deep epaxial and hypaxial muscles that were hypothesised to have a postural stabilising role. A second objective was to examine differences in MFT distribution between horses bred for endurance (Arabian) and sprinting (Quarter horse). Muscle biopsy samples were obtained from selected thoracolumbar and hind limb muscles of 5 Quarter horses, 4 Arabians, and 2 Thoroughbreds. The myosin heavy chain distribution was determined by gel electrophoresis. Mann-Whitney rank test was used to compare the proportional MFT and differences between breeds. Results: Mm. sacrocaudalis dorsalis medialis and diaphragm had the highest proportion of MFT-I. The remaining deep epaxial muscles and the hypaxial muscle m. psoas minor had approximately equal MFT I and II proportions. Mm. psoas major, iliocostalis, longissimus dorsi and the hind limb muscles contained mostly MFT-IIX. The fibre type distribution was similar between Arabians and Quarter horses, although Quarter horses had more MFT-IIX fibres in psoas major (P = 0.02) while Arabians had more MFT-I fibres in m. longissimus dorsi (P = 0.03).

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“…Janda was the first to show that what is important is not how much weight you can lift, but the skill or quality of the movement pattern that is used (Janda, 1978(Janda, , 1983) Bigger isn't necessarily better and the person who can "Lift a house" is typically not the best athlete (see Fig. 11).…”

Section: Myth #5 -Acute and Chronic Pain Are Similarmentioning

confidence: 99%

Musculoskeletal myths

Liebenson¹

2012

Journal of Bodywork and Movement Therapies

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On the Concept of Postural Muscles and Posture in Man

Abstract: Basic human posture should be derived from the principal movement pattern, namely gait. Since we stand on one leg for most of the time during walking, the stance on one leg should be considered to be the typical posture in man; the postural muscles are those which maintain this posture.

Cited by 79 publications

References 2 publications

Hypoxia-related gene expression in porcine skeletal muscle tissues at different altitude

Hypoxia-related gene expression in porcine skeletal muscle tissues at different altitude

Muscle Fibre Type Distribution of the Thoracolumbar and Hindlimb Regions of Horses: Relating Fibre Type and Functional Role

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