scholarly journals Assessment of posterior shoulder muscle stiffness related to posterior shoulder tightness in college baseball players using shear wave elastography

2017 ◽  
Vol 9 ◽  
pp. 30-31
Author(s):  
Yutaka Mifune ◽  
Atsuyuki Inui ◽  
Fumiaki Takase ◽  
Yasuhiro Ueda ◽  
Takeshi Kataoka ◽  
...  
Keyword(s):  
Shear Wave ◽  
Shear Wave Elastography ◽  
Muscle Stiffness ◽  
Baseball Players ◽  
Shoulder Muscle ◽  
Posterior Shoulder ◽  
College Baseball ◽  
Posterior Shoulder Tightness

scholarly journals Sequential Changes in Posterior Shoulder Muscle Elasticity After Throwing as Assessed via Ultrasound Shear Wave Elastography

2021 ◽  
Vol 9 (8) ◽  
pp. 232596712110213
Author(s):  
Kohei Yamaura ◽  
Yutaka Mifune ◽  
Atsuyuki Inui ◽  
Hanako Nishimoto ◽  
Takeshi Kataoka ◽  
...  
Keyword(s):  
Shear Wave ◽  
Shear Wave Elastography ◽  
Muscle Stiffness ◽  
Serratus Anterior ◽  
Muscle Elasticity ◽  
Time Points ◽  
Posterior Shoulder ◽  
Study Results ◽  
The Mean ◽  
Lower Trapezius

Background: Improvements in ultrasound diagnostic equipment and techniques can enable muscle stiffness to be measured quantitatively as muscle elasticity using ultrasound shear wave elastography (USWE), where high muscle elasticity values represent muscle stiffness. Purpose: To use USWE to analyze the sequential changes in muscle elasticity in the posterior shoulder before and after pitching. Study Design: Descriptive laboratory study. Methods: The authors evaluated 14 baseball players who had played in high school or college at an intermediate level. The elasticity of the supraspinatus, infraspinatus (ISP), middle trapezius, lower trapezius (LT), rhomboideus, and serratus anterior muscles of the throwing shoulder was measured using USWE at 3 time points: before, immediately after, and 24 hours after a throwing session of 100 pitches. The authors analyzed the sequential changes in the mean elasticity values of the respective muscles at the 3 time points. Results: The mean elasticity values before, immediately after, and 24 hours after throwing were as follows: supraspinatus: 32.9, 53.4, 43.8 kPa; ISP: 22.7, 44.8, 43.7 kPa; middle trapezius: 45.1, 70.3, 59.9 kPa; LT: 32.8, 45.5, 46.5 kPa; rhomboideus: 29.1, 47.5, 38.8 kPa; and serratus anterior: 19.2, 36.9, 26.5 kPa, respectively. The mean elasticity values for all tested muscles were significantly higher immediately after throwing compared with before throwing ( P ≤ .0086 for all), and elasticity values in the ISP and LT remained significantly higher 24 hours after throwing compared with before throwing ( P ≤ .019 for both). Conclusion: The study results indicated that pitching significantly increased ISP and LT muscle elasticity even after 24 hours.

scholarly journals Throwing can Increase the Stiffness of the Scalene Muscle

2020 ◽  
Vol 8 (7_suppl6) ◽  
pp. 2325967120S0040
Author(s):  
Tetsuya Takenaga ◽  
Satoshi Takeuchi ◽  
Hideki Murakami ◽  
Katsumasa Sugimoto ◽  
Masahito Yoshida
Keyword(s):  
Surgical Treatment ◽  
Brachial Plexus ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Muscle Stiffness ◽  
Deep Part ◽  
Baseball Players ◽  
Scalene Muscle ◽  
Throwing Motion ◽  
Anterior Scalene Muscle

Objectives: Thoracic outlet syndrome (TOS) has been reported as a set of symptoms due to the compression of the brachial plexus and subclavian vessels in the region of the thoracic outlet1. As a type of TOS, scalenus anticus syndrome involves the compression of the brachial nerves as they pass through the interval surrounded by the anterior and middle scalene muscles, and the first rib bone or cervical rib2. Recently, exercise-induced TOS is becoming more common in athletes, especially for those who perform repetitive overhead and hyperabduction maneuvers with upper limbs, such as baseball players. However, the effect of throwing on the stiffness of the scalene muscles is unknown. Thus, the purpose of this study was to quantitatively measure the stiffness of the scalene muscles using real-time shear wave elastography (SWE). The stiffness of scalene muscles was hypothesized to increase for the throwing side of baseball players. Methods: Thirty college baseball players (age range 19 to 21 years) were included for this study. Ultrasonic SWE with a 2-10 MHz linear array probe transducer (Aixplorer; SuperSonic Imagine, Aix-en-Provence, France) was used to assess the stiffness of the anterior and middle scalene muscles. Each participant was sited. The measurements were performed in two arm positions; 1) adducted and neutral rotation of the shoulder 2)90 degree of abduction and external rotation of shoulder with elbow flexed to simulate a clinical examination known as Roos test3. In both of the arm positions, the transducer was positioned just superior to the clavicular bone, parallel to its axis. Transducer was moved superiorly and tilted to visualize the superior surfaces of the anterior and middle scalene muscles parallel to the surface of the fifth cervical nerve simultaneously (Figure 1A). In this position, shear wave elastography was performed to measure the elasticity of each scalene muscle as its stiffness. Each muscle was divided into superior and deep areas. In both areas of each muscle, three 3mm-diameter circles were set to measure the elasticities of the scalene muscles and its averaged data in each area was defined as each stiffness (Figure 1B). A repeated-measures analysis of variance (ANOVA) was used to compare the elasticity of superior and deep areas in anterior and middle scalene muscles in throwing and non-throwing side. Values of p<0.05 were considered statistically significant. Results: For the throwing side, higher stiffness was found in the deep part of the middle scalene muscle compared to the superior and deep parts of the anterior scalene muscle with an adducted and neutrally rotated shoulder (p=0.0433). Moreover, the muscle stiffness was significantly higher in the superior and deep part of the middle scalene muscle than in the superior and deep parts of anterior scalene muscle in an abducted and externally rotated position of shoulder (p =0.00187). Meanwhile, no significant difference was found in the anterior and middle scalene muscles for the non-throwing side in both arm positions. Conclusion: In professional athletes with TOS who experienced surgical treatment, moderate to severe hypertrophy of the anterior scalenus muscles has been reported to be found4. Meanwhile, although the stiffness of the scalene muscles can be also related to the compression on the brachial plexus and on subclavian vessels in the region of the thoracic outlet, its quantitative measurements in the scalene muscles has not been reported. In this study, at throwing side, the muscle stiffness significantly increased in the superior area of middle scalene muscle in throwing side. While no contribution was identified in the scalene muscles at non-throwing side. As a result, repeat throwing motion can increase the stiffness of the middle scalene muscle. As a result, the brachial plexus and/or the subclavian artery could be compressed at the interscalene triangle. Throwing athletes with TOS should be treated, considering the stiffness of the middle scalene muscle, even conservative or surgical treatment. Our study was the first study to evaluate the effects of throwing on the stiffness of the scalene muscles in throwing athletes. Repetitive throwing motion can affect the stiffness of middle scalene muscle. Reduction of the middle scalene muscle should be considered to treat throwing athlete who has TOS. [Figure: see text]

scholarly journals Can Shoulder Muscle Activity Be Evaluated With Ultrasound Shear Wave Elastography?

2018 ◽  
Vol 476 (6) ◽  
pp. 1276-1283 ◽  
Author(s):  
Kwanwoo Kim ◽  
Hyun-Jung Hwang ◽  
Seul-Gi Kim ◽  
Jin-Hyuck Lee ◽  
Woong Kyo Jeong
Keyword(s):  
Shear Wave ◽  
Muscle Activity ◽  
Shear Wave Elastography ◽  
Shoulder Muscle

Effect of Rest Duration Between Static Stretching on Passive Stiffness of Medial Gastrocnemius Muscle In Vivo

2020 ◽  
Vol 29 (5) ◽  
pp. 578-582
Author(s):  
Masatoshi Nakamura ◽  
Shigeru Sato ◽  
Ryosuke Kiyono ◽  
Nobushige Takahashi ◽  
Tomoichi Yoshida
Keyword(s):  
Elastic Modulus ◽  
Shear Wave ◽  
Repeated Measures ◽  
Shear Wave Elastography ◽  
Muscle Stiffness ◽  
Medial Gastrocnemius ◽  
Static Stretching ◽  
Shear Elastic Modulus ◽  
Before And After

Context: In clinical and sports settings, static stretching (SS) is usually performed to increase range of motion (ROM) and decrease passive muscle stiffness. Recently, the shear elastic modulus was measured by ultrasonic shear wave elastography as an index of muscle stiffness. Previous studies reported that the shear elastic modulus measured by ultrasound shear wave elastography decreased after SS, and the effects of SS on shear elastic modulus were likely affected by rest duration between sets of SS. Objective: To investigate the acute effects of SS with different rest durations on ROM and shear elastic modulus of gastrocnemius and to clarify whether the rest duration between sets of SS decreases the shear elastic modulus. Design: A randomized, repeated-measures experimental design. Setting: University laboratory. Participants: Sixteen healthy males volunteered to participate in the study (age 21.3 [0.8] y; height 171.8 [5.1] cm; weight 63.1 [4.5] kg). Main Outcome Measures: Each participant underwent 3 different rest interval durations during SS (ie, long rest duration: 90 s; normal rest duration: 30 s; and short rest duration: 10 s). This SS technique was repeated 10 times, thus lasting a total of 300 seconds with different rest durations in each protocol. The dorsiflexion ROM and shear elastic modulus were measured before and after SS. Results: Our results revealed that dorsiflexion ROM and shear elastic modulus were changed after 300-second SS; however, no effects of the rest duration between sets of SS were observed. Conclusions: In terms of decreasing the shear elastic modulus, clinicians and coaches should not focus on the rest duration when SS intervention is performed.

The utility of shear wave elastography in the evaluation of muscle stiffness in patients with cerebral palsy after botulinum toxin A injection

2020 ◽  
Vol 47 (4) ◽  
pp. 609-615
Author(s):  
Nurullah Dağ ◽  
Mahi Nur Cerit ◽  
Halit Nahit Şendur ◽  
Murat Zinnuroğlu ◽  
Bilge Nur Muşmal ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Botulinum Toxin ◽  
Shear Wave ◽  
Botulinum Toxin A ◽  
Shear Wave Elastography ◽  
Muscle Stiffness ◽  
Toxin A

Relationship between shear modulus and passive tension of the posterior shoulder capsule using ultrasound shear wave elastography: A cadaveric study

2020 ◽  
Vol 99 ◽  
pp. 109498 ◽  
Author(s):  
Naoya Iida ◽  
Keigo Taniguchi ◽  
Kota Watanabe ◽  
Hiroki Miyamoto ◽  
Tatsuya Taniguchi ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Cadaveric Study ◽  
Passive Tension ◽  
Posterior Shoulder

scholarly journals Muscle stiffness in rheumatoid arthritis is not altered or associated with muscle weakness: A shear wave elastography study

2019 ◽  
Vol 30 (4) ◽  
pp. 617-625 ◽  
Author(s):  
Abdulrahman M. Alfuraih ◽  
Ai Lyn Tan ◽  
Philip O’Connor ◽  
Paul Emery ◽  
Richard J. Wakefield
Keyword(s):  
Rheumatoid Arthritis ◽  
Shear Wave ◽  
Muscle Weakness ◽  
Shear Wave Elastography ◽  
Muscle Stiffness
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