Review
Radiology, Nuclear Medicine & Medical Imaging
Jacqueline Roots, Gabriel S. Trajano, Davide Fontanarosa
Summary: This article systematically reviewed the literature on the change in muscle stiffness as measured by ultrasound elastography in stroke survivors. The analysis of 29 relevant studies showed that ultrasound elastography has good validity in assessing muscle stiffness in stroke survivors and identified factors that affect muscle stiffness.
INSIGHTS INTO IMAGING
(2022)
Article
Physiology
Kotono Kobayashi, Masahide Yagi, Hiroshige Tateuchi, Megumi Ota, Jun Umehara, Haruka Sakata, Sayaka Okada, Noriaki Ichihashi
Summary: This study aimed to investigate the effect of age on the mechanical properties, muscle size, and muscle quality in different body parts. The results showed that the effect of age on muscle shear modulus varied depending on body parts, with the lower limb and oblique abdominal muscles negatively associated with age. Additionally, the muscle shear modulus in the relaxed position may be more susceptible to aging than in the stretched position.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Article
Physiology
Sayaka Nakao, Tome Ikezoe, Masahide Yagi, Jun Umehara, Shusuke Nojiri, Noriaki Ichihashi
Summary: This study aimed to investigate muscle elongation by assessing the echo intensity of muscles. Results showed that the echo intensity increased with muscle elongation during passive ankle dorsiflexion, especially in the longitudinal image using the maximum Region of Interest (ROI).
FRONTIERS IN PHYSIOLOGY
(2023)
Review
Radiology, Nuclear Medicine & Medical Imaging
Domenico Albano, Mariachiara Basile, Salvatore Gitto, Carmelo Messina, Stefano Longo, Stefano Fusco, Ziga Snoj, Silvia Gianola, Silvia Bargeri, Greta Castellini, Luca Maria Sconfienza
Summary: This study compares pathological and healthy tendons using shear-wave elastography (SWE) technique.
Article
Acoustics
Anika Obrist, Lisa Ruby, Alexander Martin, Thomas Frauenfelder, Marga Rominger, Catherine Paverd
Summary: The objective of this study was to investigate the impact of confounding factors on liver shear wave speed (SWS) and shear wave dispersion slope (SWDS) measurements using a Canon Aplio clinical ultrasound scanner. It was found that depth had the most significant effect on both SWS and SWDS measurements. The angle, height, width, and ROI size had minimal impact on the measurements. For SWS measurements, the most consistent depth range was between 2 and 4 cm for the top of the acquisition box (AQB) and between 3 and 7 cm for the ROI. However, for SWDS measurements, there was no stable AQB placement or ROI depth due to a significant depth dependency.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2023)
Review
Medicine, General & Internal
Jure Aljinovic, Blaz Barun, Benjamin Benzon, Ana Poljicanin, Tonko Vlak
Summary: Ultrasound shear wave elastography (SWE) can be used as an objective measurement for the initial screening of whiplash injury, but a suitable method for follow-up of recovery is still being sought.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Vinicius P. V. Alves, Jonathan R. Dillman, Jean A. Tkach, Paula S. Bennett, Stavra A. Xanthakos, Andrew T. Trout
Summary: This study found moderate to high correlation between quantitative US shear-wave speed (SWS) and MRI elastography-derived stiffness in children, adolescents, and young adults with liver disease. US SWS was able to predict abnormal liver stiffness with high accuracy.
Review
Acoustics
Laura Daniela Ordierez Zuniga, Carlos Alberto Gaviria Lopez, Elizabeth Roldan Gonzalez
Summary: The study reviews the use of ultrasound elastography techniques for evaluating muscle stiffness caused by spasticity in patients with central nervous system diseases. While showing some limitations in spasticity assessment, the technique holds promise as a diagnostic tool for designing treatment plans and monitoring treatment effectiveness.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Felix-Mihai Maralescu, Milena Chiodan, Alexandru Sircuta, Adalbert Schiller, Ligia Petrica, Flaviu Bob
Summary: The meta-analysis of published literature on renal elastography in patients with CKD revealed that CKD patients have lower kidney SWS compared to healthy controls, and there is a positive association between kidney SWS and eGFR. However, there is high heterogeneity across existing studies, indicating a need for further research to determine the factors influencing kidney SWS in CKD patients and specify the role of renal elastography in clinical practice.
APPLIED SCIENCES-BASEL
(2022)
Article
Acoustics
Jacqueline Roots, Gabriel S. Trajano, Christopher Drovandi, Davide Fontanarosa
Summary: This study assessed the application of wave elastography in muscle stiffness assessment and compared the measurement results of two different devices. The study found significant differences in stiffness variability among different muscle regions, with the 75% location having the lowest variability and highest agreement, suggesting its use in future stiffness assessments.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Anna S. Morr, Helge Herthum, Felix Schrank, Steffen Goerner, Matthias S. Anders, Markus Lerchbaumer, Hans-Peter Mueller, Thomas Fischer, Klaus-Vitold Jenderka, Hendrik H. G. Hansen, Paul A. Janmey, Juergen Braun, Ingolf Sack, Heiko Tzschatzsch
Summary: This study introduces a phantom that mimics the stiffness dispersion of the human liver, allowing for improved standardization of liver elastography across ultrasound and MRI devices. The phantom shows good reproducibility and low variability, making it useful for establishing standard liver stiffness measurements.
INVESTIGATIVE RADIOLOGY
(2022)
Article
Engineering, Biomedical
Miran Goo, Kylie Tucker, Leanne M. Johnston
Summary: In typically developing children, shear modulus of lower limb muscles increases with increasing Net-Longitudinal Tension Angle. Recommendations enable comparison of values across different test positions and populations. Some relation between shear modulus and age was identified, but more research is needed.
CLINICAL BIOMECHANICS
(2021)
Article
Oncology
Xiao Liu, Li Xie, Xianjun Ye, Yayun Cui, Nianan He, Lei Hu
Summary: This study aimed to establish a simple algorithm to reduce unnecessary FNA on TIRADS 4 thyroid nodules using different quantitative parameters of ultrasonic elasticity and the CHAID method. The prediction model using quantitative parameters had high diagnostic performance, quickly distinguishing benign lesions and minimizing subjective influence.
FRONTIERS IN ONCOLOGY
(2022)
Review
Radiology, Nuclear Medicine & Medical Imaging
Xia-Li Wang, Shu Lin, Guo-Rong Lyu
Summary: Changes in tissue stiffness can be identified earlier than clinical features, and elastography techniques provide valuable noninvasive measurement of mechanical properties. Ultrasound elastography plays a critical role in obstetrics and gynecology, especially for uterine tumor diagnosis, preterm birth prediction, and intrauterine insemination.
INSIGHTS INTO IMAGING
(2022)
Article
Engineering, Biomedical
Michael G. Sun, Taeyoon Son, Joseph Crutison, Victor Guaiquil, Shujun Lin, Lara Nammari, Dieter Klatt, Xincheng Yao, Mark I. Rosenblatt, Thomas J. Royston
Summary: The cornea is a highly specialized organ that requires mechanical stiffness to maintain its shape and refractive power. Dynamic optical coherence elastography is a non-contact imaging technique that can be used to measure corneal tissue stiffness. However, the effects of intraocular pressure-induced prestress must be taken into consideration for accurate measurements.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Kosuke Hirata, Hiroaki Kanehisa, Naokazu Miyamoto
Summary: It was found that MTUs with long fascicle and short tendinous tissue are advantageous for joint flexibility. In vivo, MTU architectural parameters are correlated with joint range of motion, particularly with slack angle.
Article
Sport Sciences
Eri Miyamoto-mikami, Hiroshi Kumagai, Kumpei Tanisawa, Yuki Taga, Kosuke Hirata, Naoki Kikuchi, Nobuhiro Kamiya, Ryoko Kawakami, Taishi Midorikawa, Takuji Kawamura, Ryo Kakigi, Toshiharu Natsume, Hirofumi Zempo, Koya Suzuki, Yoshimitsu Kohmura, Kazunori Mizuno, Suguru Torii, Shizuo Sakamoto, Koichiro Oka, Mitsuru Higuchi, Hisashi Naito, Naokazu Miyamoto, Noriyuki Fuku
Summary: The study investigated the association between the COL1A1 rs1107946 variant and fatigue fracture/muscle injury in athletes, and found that C-allele carriers had a higher risk of fatigue fracture but a lower risk of muscle injury. In nonathletes, C-allele carriers showed lower BMD and muscle stiffness.
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2021)
Article
Sport Sciences
Naokazu Miyamoto, Kosuke Hirata
Summary: The study found that differences in muscle stiffness and proximal aponeurosis strain of the biceps femoris long head are minimal across different sites, and there is no exceptional muscle stiffness and proximal aponeurosis strain at moderate-to-high contraction intensity where sprinting-type hamstring strain typically occurs.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2021)
Article
Neurosciences
Ryosuke Ando, Shinya Sato, Naoya Hirata, Hiroki Tanimoto, Naoto Imaizumi, Yasuhiro Suzuki, Kosuke Hirata, Ryota Akagi
Summary: The study found a significant correlation between the resting medial gastrocnemius stiffness and drop jump performance, suggesting that an increase in resting muscle stiffness can enhance explosive athletic performance.
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
(2021)
Article
Physiology
Mikio Shoji, Ryoichi Ema, Kazunori Nosaka, Akihiro Kanda, Kosuke Hirata, Ryota Akagi
Summary: This study found that the recovery rate of MVIC torque predicted changes in neuromuscular function following eccentric exercise of the knee extensors, but was not correlated with muscle soreness and stiffness changes.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Sport Sciences
Yuma Tsuchiya, Naoya Hirata, Takashi Asama, Naomi Osakabe, Kosuke Hirata, Ryota Akagi
Summary: This study found that oral administration of propolis can promote muscle fatigue recovery by reducing central fatigue.
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
(2022)
Article
Physiology
Kosuke Hirata, Natsuki Iida, Akihiro Kanda, Mikio Shoji, Tsukasa Yoshida, Yosuke Yamada, Ryota Akagi
Summary: The association between age-related differences in the intracellular-to-total water ratio and explosive strength of the plantar flexors was investigated. Older participants showed lower intracellular-to-total water ratio, rate of torque development, and longer time-to-peak torque compared to young participants. The intracellular-to-total water ratio was positively associated with rate of torque development and negatively associated with time-to-peak torque, but not with electromyography activity. Rate of torque development was positively associated with electromyography activity. These findings suggest that the intracellular-to-total water ratio may be a useful predictor of age-related decrease in explosive strength and reflects changes in intrinsic contractile properties.
JOURNAL OF PHYSIOLOGICAL ANTHROPOLOGY
(2022)
Article
Physiology
Kosuke Hirata, Mari Ito, Yuta Nomura, Chiho Kawashima, Yuma Tsuchiya, Kosuke Ooba, Tsukasa Yoshida, Yosuke Yamada, Geoffrey A. Power, Neale A. Tillin, Ryota Akagi
Summary: The study investigated associations of muscle quality indices with joint-level power-related measures in older males. Results showed varying correlations between muscle quality indices and power-related measures, indicating lower knee extension power in participants with higher echo intensity, lower intracellular water content, and lower specific muscle strength.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Article
Sport Sciences
Hiroshi Kumagai, Tomoko Kaneko, Yuko Shintake, Eri Miyamoto-Mikami, Hiroyuki Tomita, Makoto Fukuo, Wataru Kawai, Mutsumi Harada, Naoki Kikuchi, Nobuhiro Kamiya, Kosuke Hirata, Hirofumi Zempo, Seiji Maeda, Naokazu Miyamoto, Noriyuki Fuku
Summary: This study found that genetic polymorphisms related to muscular strength and flexibility play important roles in male artistic gymnastics, specifically influencing the performance of events that require muscular strength and flexibility. However, no such associations were observed in female gymnasts.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2023)
Article
Engineering, Biomedical
Yosuke Yamada, Kosuke Hirata, Natsuki Iida, Akihiro Kanda, Mikio Shoji, Tsukasa Yoshida, Motohiko Myachi, Ryota Akagi
Summary: Segmental bioelectrical impedance spectroscopy can be used to measure cell membrane capacitance and characteristic frequencies of tissues. Higher cell membrane capacitance and lower characteristic frequencies are associated with larger surface area of skeletal muscle fibers with T-tubules. Muscle fiber membrane is a significant physiological factor influencing surface electromyograms and the number of motor units recruited. It is suggested that the amplitude of surface electromyograms may be correlated with cell membrane capacitance and characteristic frequencies.
MEDICAL ENGINEERING & PHYSICS
(2022)
Article
Physiology
Kosuke Hirata, Mari Ito, Yuta Nomura, Tsukasa Yoshida, Yosuke Yamada, Ryota Akagi
Summary: Maintenance and improvement of neuromuscular functions is crucial for everyone. Bioelectrical impedance analysis (BIA) can assess body electrical properties, such as phase angle (PhA), which is regarded as a muscle quantity/quality index. This study found that both thigh and whole-body PhA were associated with maximal voluntary muscle strength of the knee extensors, and this association may be due to intrinsic contractile properties but not neural aspects.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Neurosciences
Ryota Akagi, Hiroki Sato, Tatsuya Hirayama, Kosuke Hirata, Masahiro Kokubu, Soichi Ando
Summary: This study investigated the differences in the effects of watching a 2D and 3D movie on cognition and brain activity. The results showed that watching a 3D movie led to visual fatigue, resulting in longer reaction times and decreased brain activity in the right primary somatosensory cortex for the visual task. The effects on the auditory task were not significant. This suggests that performing tasks requiring visual information immediately after using a 3D application may pose unexpected risks.
FRONTIERS IN HUMAN NEUROSCIENCE
(2022)
Article
Geriatrics & Gerontology
Ryota Akagi, Yuta Nomura, Chiho Kawashima, Mari Ito, Kosuke Oba, Yuma Tsuchiya, Geoffrey A. Power, Kosuke Hirata
Summary: This study investigated the association between exercise-induced fatigue resistance and prefatigue neuromuscular strength, finding a negative correlation between prefatigue maximal power output and neuromuscular fatigue resistance.
JOURNAL OF AGING AND PHYSICAL ACTIVITY
(2022)
Article
Physiology
Kosuke Hirata, Ryota Akagi
Summary: This study compared the acute effects of static stretching on non-muscular tissue stiffness in older and young adults and examined whether a decrease in tissue stiffness improves joint flexibility. The results showed that static stretching increased range of motion and decreased joint stiffness in both groups, with no significant differences between the two groups. Only the older adult group exhibited a significant decrease in sciatic nerve stiffness. There was a significant positive correlation between sciatic nerve stiffness and joint stiffness.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Physiology
Kosuke Hirata, Ryota Akagi
Summary: This study aimed to investigate the association between triceps surae muscle stiffness and passive ankle joint stiffness. The results showed that the material properties of the triceps surae affect passive ankle joint stiffness, especially when the muscles are stretched and body size is taken into account.
FRONTIERS IN PHYSIOLOGY
(2022)