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https://www.readbyqxmd.com/read/29791977/no-association-between-rate-of-torque-development-and-onset-of-muscle-activity-with-increased-risk-of-hamstring-injury-in-elite-football
#1
Nicol van Dyk, Roald Bahr, Angus F Burnett, Evert Verhagen, Damien von Tiggelen, Erik Witvrouw
INTRODUCTION: Hamstring injuries remain a significant burden in sports that involve high speed running. In elite male football, hamstring injury has repeatedly been identified as the most common noncontact injury, representing 12% of all injuries. As the incidence remains high, investigations are aimed at better understanding how to improve prevention efforts. Intrinsic risk factors such as strength have been investigated extensively in a cohort of professional football players; however, other intrinsic measures of neuromuscular function have not been studied in this cohort...
May 23, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29776601/echo-intensity-versus-muscle-function-correlations-in-older-adults-are-influenced-by-subcutaneous-fat-thickness
#2
Matt S Stock, Morgan Whitson, Adam M Burton, Nicole T Dawson, Eric J Sobolewski, Brennan J Thompson
Recently, an equation that allows investigators to correct echo intensity for subcutaneous fat was developed. We evaluated correlations between uncorrected and corrected echo intensity versus measures of lower-extremity function. Twenty-three older adults (11 men, 12 women; mean age = 72 y) participated. B-Mode ultrasonography was used to quantify rectus femoris echo intensity and subcutaneous fat thickness. Knee extensor isometric peak torque and rate of torque development at 200 ms (RTD200) were determined (joint angle = 90°)...
May 15, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29775802/nonoperative-management-of-a-severe-proximal-rectus-femoris-musculotendinous-injury-in-a-recreational-athlete-a-case-report
#3
Park Ck, Zlomislic V, Du J, Huang Bk, Chang Ey, Chang Dg
This report describes a severe injury to the proximal rectus femoris (RF) muscle in a 37-year-old recreational athlete. This injury is a relatively rare occurrence in both the general and elite athletic populations. Acute and long-term imaging and functional outcomes are described. This athlete was able to return to full activity without surgical intervention. Follow-up imaging demonstrated gross healing of both complete (or near complete) muscle and tendon tears.
May 15, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29774307/bethlem-myopathy-in-a-portuguese-patient-case-report
#4
Ana Inês Martins, Cristin Maarque, Jorge Pinto-Basto, Luis Negrão
Mutations of the encoding genes of collagen VI (COL6A1, COL6A2 and COL6A3 ), are responsible for two classical phenotypes (with a wide range of severity), the Ullrich congenital muscular dystrophy (UCMD) and the Bethlem myopathy (BM). We present a male patient of 49 years old, with symptoms of muscle weakness beginning in childhood and of very slowly progression. At the age of 42, the neurological examination revealed proximal lower limb muscle weakness and contractures of fingers flexors muscles, positive Gowers manoeuvre and a waddling gait...
September 2017: Acta Myologica: Myopathies and Cardiomyopathies: Official Journal of the Mediterranean Society of Myology
https://www.readbyqxmd.com/read/29770501/correlation-between-cycling-power-and-muscle-thickness-in-cyclists
#5
Hyung-Jin Lee, Kang-Woo Lee, Yong-Woo Lee, Hee-Jin Kim
INTRODUCTION: The aim of this study was to determine the correlation between muscle thickness (MT) and cycling power in varsity cyclists using ultrasonography (US) and to identify any differences in MT between short- and long-distance cyclists. MATERIALS AND METHODS: Twelve cyclists participated in this study. Real-time two-dimensional B-mode US was used to measure the MT in the anterior thigh, anterior lower leg, and trunk, especially in the abdominal and lumbar regions...
May 17, 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29769821/validity-and-reliability-of-surface-electromyography-measurements-from-a-wearable-athlete-performance-system
#6
Scott K Lynn, Casey M Watkins, Megan A Wong, Katherine Balfany, Daniel F Feeney
The Athos ® wearable system integrates surface electromyography (sEMG ) electrodes into the construction of compression athletic apparel. The Athos system reduces the complexity and increases the portability of collecting EMG data and provides processed data to the end user. The objective of the study was to determine the reliability and validity of Athos as compared with a research grade sEMG system. Twelve healthy subjects performed 7 trials on separate days (1 baseline trial and 6 repeated trials). In each trial subjects wore the wearable sEMG system and had a research grade sEMG system's electrodes placed just distal on the same muscle, as close as possible to the wearable system's electrodes...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29768096/lower-extremity-muscle-function-of-front-row-rugby-union-scrummaging
#7
Mostafa Yaghoubi, Sally D Lark, Wyatt H Page, Philip W Fink, Sarah P Shultz
A rugby scrum's front row must act uniformly to transfer maximal horizontal force and improve performance. This study investigated the muscle activation patterns of lower extremity muscles in front row forwards during live and machine scrums at professional and amateur levels. Electromyography was collected bilaterally on vastus lateralis, rectus femoris and gastrocnemius muscles of 75 male rugby prop players during live and machine scrums. ANOVAs compared muscle reaction time, rate of change in muscle amplitude and muscle amplitude between groups and conditions...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29765882/relationship-between-functional-level-and-muscle-thickness-in-young-children-with-cerebral-palsy
#8
Yeo Reum Choe, Joo Sup Kim, Kee Hoon Kim, Tae Im Yi
Objective: To investigate the relationship between functional level and muscle thickness (MT) of the rectus femoris (RF) and the gastrocnemius (GCM) in young children with cerebral palsy (CP). Methods: The study participants were comprised of 26 children (50 legs) with spastic CP, aged 3-6 years, and 25 age-matched children with typical development (TD, 50 legs). The MT of the RF, medial GCM, and lateral GCM was measured with ultrasound imaging. The functional level was evaluated using the Gross Motor Function Measurement-88 (GMFM-88), Gross Motor Function Classification System (GMFCS), and based on the mobility area of the Korean version of the Modified Barthel Index (K-MBI)...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29765878/effects-of-very-high-stimulation-frequency-and-wide-pulse-duration-on-stimulated-force-and-fatigue-of-quadriceps-in-healthy-participants
#9
Kitima Rongsawad, Jonjin Ratanapinunchai
Objective: To determine the effect of very high stimulation frequency (150 and 200 Hz) with wide pulse duration versus 50 Hz with wide pulse duration on stimulated force and fatigue of quadriceps femoris in healthy participants. Methods: Thirty-four healthy participants underwent fatigue test using three stimulation frequency conditions (50, 150, and 200 Hz) with pulse duration of 0.9 ms. Normalized force values at the end of each fatigue protocol and curve fitting patterns were compared among stimulated frequencies...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29762339/the-relationship-between-fear-avoidance-and-neuromuscular-measures-of-function-in-patients-with-adult-degenerative-scoliosis
#10
Ram Haddas, Isador H Lieberman, Andrew Block
STUDY DESIGN: A prospective cohort study. OBJECTIVE: To examine the relationship of fear-avoidance beliefs and neuromuscular activity during gait in adult degenerative scoliosis (ADS) patients. SUMMARY OF BACKGROUND DATA: Among patients with chronic spine pain, fear-avoidance beliefs are predictive of poor surgical outcomes. Fear-avoidance occurs when patients perceive that movement will worsen underlying physical problems. This process leads them to restrict activity, which further heightens emotional distress...
May 14, 2018: Spine
https://www.readbyqxmd.com/read/29761113/differences-in-hip-joint-biomechanics-and-muscle-activation-in-individuals-with-femoroacetabular-impingement-compared-with-healthy-asymptomatic-individuals-is-level-ground-gait-analysis-enough
#11
Derek J Rutherford, Janice Moreside, Ivan Wong
Background: Femoroacetabular impingement (FAI) is a recognized cause of hip and groin pain and a significant factor in hip joint function during sport. Objective tests for understanding hip function are lacking in this population. Purpose: To determine whether biomechanical and electromyographic features of hip function during level-ground walking differ between a group diagnosed with FAI and those with no symptoms of FAI. Study Design: Controlled laboratory study...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29760352/time-dependent-changes-in-local-and-serum-levels-of-inflammatory-cytokines-as-markers-for-incised-wound-aging-of-skeletal-muscles
#12
Mohammed Hassan Gaballah, Tetsuya Horita, Masataka Takamiya, Keisuke Yokoji, Mamiko Fukuta, Hideaki Kato, Yasuhiro Aoki
Wound age estimation is an important research field in forensic pathology. The expression levels of cytokines in the incised skeletal muscle were analyzed using a mouse model to explore the applicability for wound aging. A 5-mm long incisional wound was made at the biceps femoris muscle, and the muscle and serum were sampled at 6, 12, 24 and 48 hours after injury. Using a multiplex bead-based immunoassay, we measured the tissue levels of nine cytokines (IL-1β, IL-6, IL-7, CCL2, CCL3, CCL4, CXCL1, CXCL2, and CXCL10), which are all involved in the pathways of inflammatory response and tissue injury...
2018: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29757913/association-between-muscle-wasting-and-muscle-strength-in-patients-who-developed-severe-sepsis-and-septic-shock
#13
Rodrigo Cerqueira Borges, Francisco Garcia Soriano
PURPOSE: To evaluate the association between the rectus femoris cross-sectional area (RFCSA) and the muscular strength obtained at the bedside in patients forwarded to the intensive care unit (ICU) for severe sepsis and septic shock. METHODS: A prospective cohort study. RFCSA was assessed by ultrasound on the following day of the ICU admission and monitored during hospitalization. The patients performed clinical tests of muscle strength (Medical Research Council (MRC) scale and handgrip dynamometry), when they could understand the verbal commands of the examiners...
May 11, 2018: Shock
https://www.readbyqxmd.com/read/29751090/sex-dependent-and-sex-independent-muscle-activation-patterns-in-adult-gait-as-a-function-of-age
#14
Christopher A Bailey, Federica Corona, Giuseppina Pilloni, Micaela Porta, Maria Chiara Fastame, Paul Kenneth Hitchcott, Maria Pietronilla Penna, Massimiliano Pau, Julie N Côté
INTRODUCTION: Aging leads to poorer neuromuscular control that may impact mobility. However, the specific decades when these changes occur, and whether these time-based changes are sex-specific, are unclear. METHODS: Adults aged 20-82 years (N = 93, 51 females) walked six gait trials at their preferred speed over a 10-m platform. Electromyography (EMG) of the rectus femoris (RF), tibialis anterior (TA), and gastrocnemius lateralis (GL) were measured using wireless surface sensors...
May 8, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29746792/the-modulation-of-corticospinal-excitability-and-inhibition-following-acute-resistance-exercise-in-males-and-females
#15
Christopher Latella, Ashlee Hendy, Dan Vanderwesthuizen, Wei-Peng Teo
OBJECTIVE: The acute responses to resistance training (RT) between males and females are poorly understood, especially from a neural perspective. Therefore, we aimed to compare the corticospinal and intracortical responses during fatigue and recovery following RT. METHODS: Twenty-two participants (12M, 10F) completed one-session of RT (3 × 12 repetition maximum) unilateral leg extensions with 60 s recovery. Single- and paired-pulse transcranial magnetic stimulation measured changes in the motor-evoked potential (MEP), corticospinal silent period (CSP), CSP/MEP ratio, and intracortical facilitation/inhibition (ICF, SICI)...
May 10, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29745890/pattern-of-muscle-involvement-in-inclusion-body-myositis-a-sonographic-study
#16
Jemima Albayda, Lisa Christopher-Stine, Clifton O Bingham Iii, Julie J Paik, Eleni Tiniakou, Seth Billings, O Manny Uy, Philippe Burlina
OBJECTIVES: Imaging plays a role in myositis assessment by detecting muscle changes indicative of pathology. This study was conducted to determine the ultrasonographic pattern of muscle involvement in patients with inclusion body myositis (IBM) through an assessment of muscle echointensity. METHODS: Sixty-two individuals were consecutively studied, 18 with IBM, 16 with polymyositis or dermatomyositis and 28 normal controls. Standardised scans were completed bilaterally for the deltoids, biceps, flexor digitorum profundus (FDP), flexor carpi ulnaris, rectus femoris, tibialis anterior and gastrocnemius assessing for muscle echointensity changes...
May 8, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29740557/hip-and-trunk-muscles-activity-during-nordic-hamstring-exercise
#17
Shideh Narouei, Atsushi Imai, Hiroshi Akuzawa, Kiyotaka Hasebe, Koji Kaneoka
The nordic hamstring exercise (NHE) is a dynamic lengthening hamstring exercise that requires trunk and hip muscles activation. Thigh muscles activation, specifically hamstring/quadriceps contractions has been previously examined during NHE. Trunk and hip muscles activity have not been enough studied. The aim of this study was to analyze of hip and trunk muscles activity during NHE. Surface electromyography (EMG) and kinematic data were collected during NHE. Ten healthy men with the age range of 21-36 years performed two sets of two repetitions with downward and upward motions each of NHE...
April 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29737543/temozolomide-regresses-a-doxorubicin-resistant-undifferentiated-spindle-cell-sarcoma-patient-derived-orthotopic-xenograft-pdox-precision-oncology-nude-mouse-model-matching-the-patient-with-effective-therapy
#18
Kentaro Igarashi, Kei Kawaguchi, Tasuku Kiyuna, Kentaro Miyake, Masuyo Miyake, Yunfeng Li, Scott D Nelson, Sarah M Dry, Arun S Singh, Irmina A Elliott, Tara A Russell, Mark A Eckardt, Norio Yamamoto, Katsuhiro Hayashi, Hiroaki Kimura, Shinji Miwa, Hiroyuki Tsuchiya, Fritz C Eilber, Robert M Hoffman
Undifferentiated spindle-cell sarcoma (USCS) is a recalcitrant cancer, resistant to conventional chemotherapy. A patient with high-grade USCS from a striated muscle was implanted orthotopically in the right biceps femoris muscle of mice to establish a patient-derived orthotopic xenograft (PDOX) model. The PDOX models were randomized into the following groups when tumor volume reached 100 mm3 : G1, control without treatment; G2, doxorubicin (DOX) (3 mg/kg, intraperitoneal [i.p.] injection, weekly, for 2 weeks); G3, temozolomide (TEM) (25 mg/kg, p...
May 8, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29731409/penetrating-anorectal-injury-caused-by-a-wild-boar-attack-a-case-report
#19
Ichiro Okano, Yuki Midorikawa, Nobumasa Kushima, Yui Watanabe, Takuya Sugiyama, Katsutaka Mitachi, Kazuaki Shinohara, Takatoshi Sawada, Katsunori Inagaki
Wild boar attacks have rarely been reported in the medical literature. This is the case of an 83-year-old male farmer who was assaulted from behind by an injured adult wild boar. He presented with hemorrhagic shock after sustaining injuries to the right profunda femoris artery and right sciatic nerve as well as significant soft-tissue injuries, bilateral iliac wing fractures, an open pneumothorax, and an anorectal injury. The anorectal injury was treated with fecal diversion but was complicated by soft-tissue infection in the surrounding dead space...
May 3, 2018: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/29730703/narrowing-of-ischiofemoral-and-quadratus-femoris-spaces-in-pediatric-ischiofemoral-impingement
#20
Shlomit Goldberg-Stein, Avi Friedman, Qi Gao, Jaeun Choi, Jacob Schulz, Eric Fornari, Benjamin Taragin
OBJECTIVE: To correlate MRI findings of quadratus femoris muscle edema (QFME) with narrowing of the ischiofemoral space (IFS) and quadratus femoris space (QFS) in children, and to identify threshold values reflecting an anatomic architecture that may predispose to ischiofemoral impingement. MATERIALS AND METHODS: A case-control retrospective MRI review of 49 hips in 27 children (mean, 13 years) with QFME was compared to 49 hips in 27 gender and age-matched controls...
May 5, 2018: Skeletal Radiology
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