Stiffness of the infraspinatus and the teres minor muscles during shoulder external rotation: An in-vitro and in-vivo shear wave elastography study

Yuri, Takuma; Trevino, Jose H.; Hatta, Taku; Kiyoshige, Yoshiro; Jacobs, Philip M.; Giambini, Hugo

doi:10.1016/j.clinbiomech.2021.105328

Cited by 8 publications

(8 citation statements)

References 28 publications

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“…2 ) using previously described methods. 6 , 10 , 11 , 19 , 27 These probe orientations were verified through B-mode ultrasound imaging. To measure muscle stiffness, 3 random SWE images were chosen from a continuous recording obtained during the measurements.…”

Section: Methodsmentioning

confidence: 88%

“… 13 During scapular plane abduction (scaption) and rotation, individual SSP and ISP subregions have been shown to present specific activation timing and play specific roles during motion. 10 , 11 , 18 , 26 , 27 We have previously suggested that the middle subregion of the ISP muscle has the potential to compensate for the insufficient activity of the SSP muscle during scaption typically observed with rotator cuff tears. 10 Forward flexion is a common functional motion of the shoulder joint.…”

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confidence: 99%

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The functional role of the supraspinatus and infraspinatus muscle subregions during forward flexion: a shear wave elastography study

et al. 2022

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Section: Methodsmentioning

confidence: 88%

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confidence: 99%

The functional role of the supraspinatus and infraspinatus muscle subregions during forward flexion: a shear wave elastography study

et al. 2022

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“…Yuri et al 9 histologically investigated the anatomical configuration of the ISP tendon along with the ISP subregions and showed the middle subregion to present the thickest tendon bundle. Kuwahara et al 19 and Yuri et al 16 individually investigated muscle stiffness using ultrasound elastography during voluntary muscle contraction and demonstrated that the middle subregion of the ISP muscle was the main region contributing to shoulder external rotation motion, while the superior subregion did not play a significant role. These findings suggest that the inferior half of the ISP tendon, similar to the anterior tendon of the SSP, could be a prime load‐bearing structure with posterior insertion of the rotator cable 33 …”

Section: Discussionmentioning

confidence: 99%

“…Kuwahara et al 19 and Yuri et al 16 individually investigated muscle stiffness using ultrasound elastography during voluntary muscle contraction and demonstrated that the middle subregion of the ISP muscle was the main region contributing to shoulder external rotation motion, while the superior subregion did not play a significant role.…”

Section: Discussionmentioning

confidence: 99%

“…3,10 The SSP includes the anterior and posterior regions, [10][11][12][13][14] and the ISP has three subregions, namely superior, middle, and inferior. 9,15,16 Several studies implementing noninvasive quantitative imaging tools that allow for estimation of tissue properties and function, such as shear wave elastography, have demonstrated different roles of the anatomical subregions of the SSP and ISP rotator cuff muscles during shoulder motions. [16][17][18][19][20] In addition, a 3-dimensional quantitative and volumetric analyses of muscle degeneration in torn shoulders showed that the superficial region of the SSP muscle primarily atrophied, while the deep subregions were mainly affected by fatty infiltration.…”

Section: Introductionmentioning

confidence: 99%

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Strain distribution in the bursal rotator cuff based on whole‐muscle and muscle subregion‐specific loading: A cadaveric study

Yuri

Prado

Trevino

et al. 2023

Journal Orthopaedic Research

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Rotator cuff (RC) tears are common injuries leading to significant dysfunction of the shoulder. Rotator cuff tears alter tension and strain in muscles and tendons. Anatomical studies demonstrated that rotator cuff muscles are comprised of anatomical subregions. However, the strain distribution within the rotator cuff tendons generated from the tension from each anatomical subregion is unknown. We hypothesized that subregions would present distinct 3‐dimensional (3D) strain distributions within the rotator cuff tendons, and that the anatomical insertion configuration of the supraspinatus (SSP) and infraspinatus (ISP) tendons might dictate strain, thus tension, transmission. 3D‐strains in the bursal side of the SSP and ISP tendons of eight fresh‐frozen cadaveric intact shoulders were obtained by applying tension on the whole SSP and ISP muscles, and on their subregions using an MTS system. Strains in the anterior region of the SSP tendon were higher than in the posterior region with whole‐SSP anterior‐region (p < 0.05) and whole‐SSP muscle loading. Higher strains were observed in the inferior half of the ISP tendon with whole‐ISP muscle (p < 0.05), middle‐subregion (p < 0.01), and superior‐subregion (p < 0.05) loading. Tension generating from the posterior‐region of the SSP was primarily transmitted to the middle facet via an overlap between the SSP and ISP tendons insertions, while the anterior‐region mainly distributed its tension into the superior facet. Tension generating from the middle and superior‐regions of the ISP was distributed into the inferior portion of the ISP tendon. These results emphasize the importance of the distinct anatomical subregions of the SSP and ISP muscles in distributing the tension to the tendons.

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Ultrasound shear wave elastography-derived tissue stiffness is positively correlated with rotator cuff tear size and muscular degeneration

Huang

Jiang

Wang

et al. 2022

Knee Surg Sports Traumatol Arthrosc

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PurposeThe purpose of this study is to describe rotator cuff muscle stiffness in patients with different degrees of rotator cuff tear (RCT) severity and to assess its predictive ability for RCT reparability. MethodsOne hundred and thirty‐three consecutive patients who were scheduled to undergo arthroscopic shoulder surgery were prospectively enrolled. Tendon retraction, fatty infiltration, and muscle atrophy were evaluated using magnetic resonance imaging. Shear modulus of supraspinatus (SSP) and infraspinatus (ISP) muscles were measured by ultrasound shear wave elastography (SWE). The tear size and reparability were determined intraoperatively. ResultsThere were 97 patients in RCT group and 36 patients in control group. Bilateral shear modulus discrepancy (Δshear modulus) was used to represent rotator cuff stiffness. Severely fatty‐infiltrated rotator cuff muscles possessed a significantly higher stiffness compared with their counterparts (SSP: CI 27.8–31.8 vs. 13.5–15.6 kPa, ISP: CI 33.2–38.1 vs. 8.8–11.2 kPa, p < 0.001). The same trend applied to muscles with distinct tendon retraction (SSP: CI 27.7–32.3 vs. 10.9–14.9 kPa, ISP: CI 33.2–38.6 vs. 6.5–11.0 kPa, p < 0.001) and obvious muscle atrophy (SSP: CI 27.9–32.1 vs. 13.6–15.8 kPa, ISP: CI 32.9–38.2 vs. 9.0–11.7 kPa, p < 0.001). Irreparable massive RCT (MRCT) patients had significantly stiffer SSP (CI 27.7–31.9 vs. 13.5–16.5 kPa, p < 0.001) and ISP (CI 33.5–37.8 vs. 10.3–14.8 kPa, p < 0.001) than reparable MRCT. The Δshear modulus of the ISP was a highly accurate predictor of RCT reparability. A cutoff value of 18.0 kPa had a sensitivity of 100% and specificity of 98.8% for irreparable MRCT. ConclusionUltrasound SWE‐derived rotator cuff muscle stiffness is closely correlated with RCT size and severity. Level of evidenceI.

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Stiffness of the infraspinatus and the teres minor muscles during shoulder external rotation: An in-vitro and in-vivo shear wave elastography study

Cited by 8 publications

References 28 publications

The functional role of the supraspinatus and infraspinatus muscle subregions during forward flexion: a shear wave elastography study

The functional role of the supraspinatus and infraspinatus muscle subregions during forward flexion: a shear wave elastography study

Strain distribution in the bursal rotator cuff based on whole‐muscle and muscle subregion‐specific loading: A cadaveric study

Ultrasound shear wave elastography-derived tissue stiffness is positively correlated with rotator cuff tear size and muscular degeneration

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