Dependence of muscle and deep fascia stiffness on the contraction levels of the quadriceps: An in vivo supersonic shear-imaging study

Otsuka, Shun; Shan, Xiyao; Kawakami, Yasuo

doi:10.1016/j.jelekin.2019.02.003

Cited by 41 publications

(39 citation statements)

References 37 publications

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“…Ultrasound Shear Wave Elastography (SWE) provides a reliable estimate of muscle shear modulus, an index of muscle stiffness (10). A strong linear relationship between muscle shear modulus and muscle force has been reported (11)(12)(13)(14)(15), which aligns with in-vitro experiments performed on stimulated frog muscle fibre and showing that the active stiffness at the muscle…”

Section: Introductionsupporting

confidence: 80%

“…Muscle shear modulus was measured using an Aixplorer ultrasonic scanner (version 6.1.1, Supersonic Imagine, Aix en Provence, France), coupled with a linear transducer array (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) MHz, field of view: 5.4 cm, SuperLinear 15-4, Vermon, Tours, France). The scanner was used in the musculo-skeletal preset of the SWE mode (options: penetration, no persistence, and no spatial smoothing).…”

Section: Elastographymentioning

confidence: 99%

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Reduced Active Muscle Stiffness after Intermittent Submaximal Isometric Contractions

Morel

Hug

Nordez

et al. 2019

Medicine &Amp; Science in Sports &Amp; Exercise

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Whether muscle stiffness is influenced by fatigue remains unclear. Classical methods used to assess muscle stiffness provide a global measure at the joint level. As fatigue may selectively affect specific muscles, a joint-level approach may not be sensitive enough to detect potential changes in muscle stiffness. Taking advantage of ultrasound shear wave elastography, this study aimed to determine the influence of a fatiguing protocol involving intermittent submaximal isometric contractions on muscle shear modulus (an index of stiffness). Methods: Shear modulus was measured on either the vastus lateralis (VL; n=9) or the abductor digiti minimi (ADM; n=10) before and after 15-mins of intermittent submaximal isometric contractions at 60% of maximal voluntary contraction (MVC; 4 s ON, 4 s OFF). An index of active muscle stiffness was estimated PRE and POST-fatigue as the slope of the linear regression established between shear modulus and absolute joint force up to 60% MVC. Results: After the fatiguing exercise, MVC was significantly decreased by 22 ± 7 % and 32 ± 15 % for knee extension and little finger abduction, respectively (p<0.001). When compared to PRE-fatigue, the index of active muscle stiffness was 12 ± 15 % lower for the VL (p < 0.031) and 44 ± 19 % lower for the ADM (p < 0.001) POST-fatigue. Conclusion: Although the present results cannot clearly determine the involved mechanisms, they demonstrate a decreased active muscle stiffness after a fatiguing task involving intermittent submaximal isometric contractions. Further studies should now determine whether this change in stiffness affects performance and risk of injury.

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Section: Introductionsupporting

confidence: 80%

Section: Elastographymentioning

confidence: 99%

Reduced Active Muscle Stiffness after Intermittent Submaximal Isometric Contractions

Morel

Hug

Nordez

et al. 2019

Medicine &Amp; Science in Sports &Amp; Exercise

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“…The methodology presented here is not an in vivo study; thus, both the contribution of the muscle activation and the effect of fat, superficial fascia and skin, on the deep fascia behavior are ignored. In vivo mechanical properties of fascia lata obtained using elastography have been reported (Otsuka et al, 2019) but such observations are still limited to a transversal section and small area of interest. Partial strain maps obtained in situ could be used as first validation data of passive numerical simulations.…”

Section: Discussionmentioning

confidence: 99%

“…To assess the effect of muscular activation on fascia strain field, which could then be implemented in leg numerical models, different approaches could be investigated. Firstly, using obtained strain maps in situ, specific areas of interest could be then studied in vivo using elastography measurements as proposed by Otsuka et al (2019) and other electromyography measurements. We can also think of strain field acquisition on the skin, as proposed here on fascia.…”

Section: Discussionmentioning

confidence: 99%

Strain Assessment of Deep Fascia of the Thigh During Leg Movement: An in situ Study

Sednieva

Viste

Naaïm

et al. 2020

Front. Bioeng. Biotechnol.

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Fascia is a fibrous connective tissue present all over the body. At the lower limb level, the deep fascia that is overlying muscles of the outer thigh and sheathing them (fascia lata) is involved in various pathologies. However, the understanding and quantification of the mechanisms involved in these sheathing effects are still unclear. The aim of this study is to observe and quantify the strain field of the fascia lata, including the iliotibial tract (ITT), during a passive movement of the knee. Three fresh postmortem human subjects were studied. To measure hip and knee angles during knee flexion-extension, passive movements from 0 • to around 120 • were recorded with a motion analysis system and strain fields of the fascia were acquired using digital image correlation. Strains were computed for three areas of the fascia lata: anterior fascia, lateral fascia, and ITT. Mean principal strains showed different strain mechanisms depending on location on the fascia and knee angle. For anterior and lateral fascia, a tension mechanism was mainly observed with major strain greater than minor strain in absolute value. While for the ITT, two strain mechanisms were observed depending on knee movement: tension is observed when the knee is extended relatively to reference position of 47 • , however, pure shear can be observed when the knee is flexed. In some cases, minor strain can also be higher than major strain in absolute value, suggesting high tissue compression probably due to microstructural fiber rearrangements. This in situ study is the first attempt to quantify the superficial strain field of fascia lata during passive leg movement. The study presents some limitations but provides a step in understanding strain mechanism of the fascia lata during passive knee movement.

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“…SSI is a valid and reliable technique to evaluate stiffness and morphology of skeletal muscles, tendons, and fasciae in vivo. [26][27][28] SSI uses acoustic push pulses that propagate in the soft tissues and measures their velocity (ie, shear wave velocity: SWV) as an index of stiffness. 29,30 We recently developed a technique using SSI to measure localized SWV values and thickness of PF with high repeatability.…”

Section: Ultrasound Measurementsmentioning

confidence: 99%

Acute effects of long‐distance running on mechanical and morphological properties of the human plantar fascia

Shiotani

Mizokuchi

Yamashita

et al. 2020

Scandinavian Med Sci Sports

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Long‐distance running (LDR) can induce transient lowering of the foot arch, which may be associated with mechanical fatigue of the plantar fascia (PF). However, this has not been experimentally tested in vivo. The purpose of this study was to test our hypothesis that LDR induces transient and site‐specific changes in PF stiffness and morphology and that those changes are related to the lowering of the foot arch. Ten male recreational long‐distance runners and 10 untrained men were requested to run overground for 10 km. Before and after running, shear wave velocity (SWV: an index of soft tissue stiffness) and thickness of PF at three different sites from its proximal to distal end were measured using supersonic shear imaging and B‐mode ultrasonography. Foot dimensions including the navicular height were measured using a three‐dimensional foot scanner. SWV at the proximal site of PF and navicular height was significantly decreased in both groups after running, with a higher degree in untrained men (−21.9% and −14.1%, respectively) than in runners (−4.0% and −6.3%, respectively). The relative change (%Δ) in SWV was positively correlated with %Δnavicular height in both groups (r = .69 and r = .65, respectively). Multiple regression analysis revealed that %ΔSWV at the proximal site solely explained 72.7% of the total variance in %Δnavicular height. It is concluded that LDR induces transient and site‐specific decreases in PF stiffness. These results suggest that the majority of running‐induced lowering of the foot arch is attributable to the reduction of PF stiffness at the proximal site.

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Dependence of muscle and deep fascia stiffness on the contraction levels of the quadriceps: An in vivo supersonic shear-imaging study

Cited by 41 publications

References 37 publications

Reduced Active Muscle Stiffness after Intermittent Submaximal Isometric Contractions

Reduced Active Muscle Stiffness after Intermittent Submaximal Isometric Contractions

Strain Assessment of Deep Fascia of the Thigh During Leg Movement: An in situ Study

Acute effects of long‐distance running on mechanical and morphological properties of the human plantar fascia

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