Effect of hip flexion angle on stiffness of the adductor longus muscle during isometric hip flexion

Kato, Takuya; Taniguchi, Keigo; Kikukawa, Daisuke; Kodesho, Taiki; Katayose, Masaki

doi:10.1016/j.jelekin.2020.102493

Cited by 6 publications

(10 citation statements)

References 27 publications

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“…Based on this theory, some researchers have recently reported changes in passive muscle elasticity associated with the joint angle Le et al, 2015) and the effect of stretching on muscle elasticity (Nakao et al, 2018;Taniguchi et al, 2015). In this study, the strong linear relationship between the passive force and the shear modulus passive muscle elasticity of the AL muscle associated with the joint angle reported in previous studies (Kato et al, 2020;Ogawa et al, 2020) is considered to reflect the change in the passive force of the AL muscle.…”

Section: Discussionmentioning

confidence: 76%

“…These results indicate that it is possible to indirectly estimate the passive force change of the AL muscle regardless of the region by measuring the shear modulus change using SWE. Therefore, the change in the passive muscle elasticity of the AL muscle associated with the joint angle reported in previous studies (Kato et al, 2020; Ogawa et al, 2020) is considered to reflect the change in the passive force of the AL muscle.…”

Section: Discussionmentioning

confidence: 99%

“…After fixing the AL muscle to the device, an ultrasound echo pad with a thickness of 30 mm (Echo PAD; Yasojima Proceed Co., Ltd.) was placed under the muscle. The transducer was then placed on the muscles along its longitudinal axis such that it was parallel to the muscle fibers (Kato et al, 2020). Ultrasound gel was applied between the echo pad and muscle, and between the echo pad and transducer.…”

Section: Methodsmentioning

confidence: 99%

“…Consequently, SWE has been recognized as a useful tool for the indirect measurement of the mechanical properties of skeletal muscles, such as passive force. Using this technology, we examined the effect of the hip flexion angle on the shear modulus of the AL muscle at 0° of the hip abduction angle during rest in living humans and showed that the shear modulus of the AL muscle was higher at 0° than at 80° of the hip flexion angle (Kato et al, 2020). Resultantly, we concluded that the mechanical stress of the AL muscle caused by muscle elongation would be higher in the extended hip position.…”

Section: Introductionmentioning

confidence: 99%

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Adductor longus: An anatomical study to better understand groin pain

et al. 2022

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We investigated the shear modulus-passive force relationship in the hip adductor longus (AL) muscles of human cadavers and explored the effect of muscle architecture on the elastic properties of the AL muscle using shear wave elastography (SWE).Nine AL muscles were harvested from a soft, embalmed cadaver. The AL muscles were affixed to a custom-built device comprising two clamps, a pulley, and a cable to provide passive loads, which were increased from 0 to 600 g in 60-g increments. The shear modulus of the AL muscle was measured in the proximal (Pro), middle (Mid), and distal (Dis) regions. The masses and anatomical cross-sectional areas (ACSAs) of the AL muscles were measured. The shear modulus-passive load relationship of each tested muscle region was analyzed by fitting a least-squares regression line. Moreover, the rate of increase in the shear modulus per unit load (s) was calculated. The shear modulus and passive force were linearly correlated for all AL muscles in each region (p < 0.01). The mean coefficients of determination (R 2 ) for Pro, Mid, and Dis were 0.989, 0.986, and 0.982, respectively. The rate of increase in the shear modulus per unit load significantly correlated with the reciprocal of the muscle mass (r = 0.77, p = 0.02) and ACSA (r = 0.43, p = 0.03). Shear wave elastography can be used as an indirect measure of passive force in any region of the AL muscle. Additionally, the rate of increase in the shear modulus per unit load could be associated with muscle architectural parameters.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adductor longus: An anatomical study to better understand groin pain

et al. 2022

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“…Further, the chi‐square test was used to assess the percentage of the dominant shoulder side. Friedman with Dunn's post hoc test was used to compare the SWV of each muscle region and MVIC between groups (Hatta et al, 2016 ; Kato et al, 2021 ). The level of significance was set at 5% for all tests, and data are presented as mean and standard deviation in the text and mean and standard error in the figures.…”

Section: Methodsmentioning

confidence: 99%

Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear

et al. 2021

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This study aimed to compare the effect of the load of the upper limb on the stiffness of supraspinatus muscle regions during isometric shoulder abduction in the scapular plane in healthy individuals and patients with a rotator cuff tear. Thirteen male patients were scheduled for arthroscopic rotator cuff repair, and 13 healthy male individuals were recruited. The movement task involved 30 isometric shoulder abduction in the scapular plane. The tasks included passive abduction, abduction with half-weight of the upper limb (1/2-weight), and full weight of the upper limb (fullweight). The stiffness of the supraspinatus muscle (anterior superficial, anterior deep, posterior superficial, and posterior deep regions) was recorded using ultrasound shear-wave elastography. The stiffness of the anterior superficial region on the affected side was significantly lower than that on the control side for the 1/2-weight and full-weight tasks. The stiffness of the anterior deep, posterior superficial, and

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