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Rectus femoris

Zachariah J Henderson, Paolo Sanzo, Carlos Zerpa, Derek Kivi
OBJECTIVE: To determine if softshell (AE) and semi-rigid (T1) ankle braces affect lower extremity iEMG activity, force, and jump height during a Vertical Jump Test. DESIGN: Repeated measures, crossover. SETTING: Laboratory. PARTICIPANTS: 42 healthy, active individuals. OUTCOME MEASURES: Vertical jump height, iEMG activity, peak vGRF. RESULTS: There was significant change across conditions in lateral gastrocnemius (LG) iEMG activity, F(2,70) = 5...
April 5, 2019: Physical Therapy in Sport
L Eduardo Cofré Lizama, Fary Khan, Mary P Galea
BACKGROUND: The mechanisms by which spasticity reductions after botulinum toxin A (BoNT) affect gait in stroke are not well understood. We systematically reviewed the effects of BoNT on spatiotemporal, kinematic, kinetic and electromyographic (EMG) measures during gait. QUESTION: What are the effects of botulinum toxin on gait mechanics in stroke patients? METHODS: Systematic search using PubMed and Web of Science. We considered all studies that reported laboratory-based and instrumented gait measures as primary or secondary outcomes to determine the effects of BoNT on walking performance in stroke populations only...
April 4, 2019: Gait & Posture
Yusuke Takahashi, Akira Saito, Hiromichi Sato, Kazuyuki Shibata, Kazuki Okura, Kazuo Kinoshita, Arata Seto, Shinjiro Osawa, Masahiko Wakasa, Minoru Kimoto, Kyoji Okada
We aimed to elucidate the relationship between active force production and the curvature of the central aponeurosis (CA) of the rectus femoris in young healthy participants as fundamental data and compare the muscle CA curvature before and after straight leg raising (SLR) training in participants with knee osteoarthritis (OA). Central aponeurosis curvature was determined during submaximal and maximal voluntary contractions (MVCs) using ultrasonography. Twenty-five young healthy female volunteers underwent ultrasonographic measurements under conditions of isometric MVC...
April 5, 2019: Ultrasound Quarterly
Lucas A Pereira, Rodrigo Ramirez-Campillo, Saul Martín-Rodríguez, Ronaldo Kobal, César C C Abad, Ademir F S Arruda, Aristide Guerriero, Irineu Loturco
PURPOSE: This study aimed to examine the variations in the velocity of contraction (Vc) assessed via tensiomyography (TMG), vertical jumping ability, and sprinting speed induced by four different exercise protocols (i.e., strength, sprint, plyometric, and technical training sessions) in fourteen male National Team rugby players (age: 21.8 ± 2.6 years; weight: 83.6 ± 8.5 kg; height: 177.4 ± 6.7 cm). METHODS: Physical tests were conducted immediately pre- and post-four distinct workouts, in the following order: (1) TMG in the rectus femoris (RF) and biceps femoris (BF) muscles; (2) squat and countermovement jumps (SJ and CMJ); and (3) 30-m sprint velocity...
April 8, 2019: International Journal of Sports Physiology and Performance
Vincenzo Ricci, Levent Özçakar
A 30-year-old man presented to our clinic with anterior pain and functional limitation of the left hip for the last two months. The pain had been constant (Numeric Rating Scale: 6/10), and more severe when playing football and climbing the stairs. This article is protected by copyright. All rights reserved.
April 8, 2019: PM & R: the Journal of Injury, Function, and Rehabilitation
Dúcia C Cosme-Trindade, Simone M Baldisserotto, Jefferson F Loss, Rosemary S A Shinkai
Occlusal support may influence muscular function during complex motor tasks. This study evaluated the duration and sequence of muscular activation of masticatory (temporal, masseter), postural head/neck (sternocleidomastoid, trapezius), postural trunk (rectus abdominis, paravertebrals), and low extremity strength (rectus femoris, gastrocnemius) muscles during simulation of activities of daily living (ADL) in edentulous women wearing complete dentures (n = 10) and in dentate women (n = 10). Electromyographic activity was recorded during tests of stand-up/sit down in the Chair, sit up/lie down in the Bed and lift/lower Bags...
April 3, 2019: European Journal of Oral Sciences
Xin Chen, Chenxi Xie, Zhewei Chen, Qiaoliang Li
OBJECTIVES: The purpose of this study was to develop an automatic tracking method for the muscle cross-sectional area (CSA) on ultrasound (US) images using a convolutional neural network (CNN). The performance of the proposed method was evaluated and compared with that of the state-of-the art muscle segmentation method. METHODS: A real-time US image sequence was obtained from the rectus femoris muscle during voluntary contraction. A CNN was built to segment the rectus femoris muscle and calculate the CSA in each US frame...
April 1, 2019: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Ryota Okoba, Masaki Hasegawa, Hisayoshi Yoshizuka, Yuichi Honda, Masayoshi Ichiba, Toyoko Asami
[Purpose] To assess the influence of plantar sensory input and task guidance produced by a protrusion on lower limb joint dynamics during gait by changes in muscle activity and two-dimensional motion analysis. The protrusion seals on the soles of the feet, named "Perceptual Stimulus Protrusion" were used in this study. [Participants and Methods] In this study, 40 and 42 healthy adults were recruited for muscle activity and two-dimensional analysis, respectively. In addition to walking without perceptual stimulus protrusion ("Control" condition), the testing conditions included attachment of the protrusion to the heel ("Heel Condition") and the hallucal ("Hallucal Condition")...
March 2019: Journal of Physical Therapy Science
Philip Malloy, Austin V Stone, Kyle N Kunze, William H Neal, Edward C Beck, Shane J Nho
PURPOSE: To compare the symptomatic hip muscle cross-sectional area (CSA) in patients with unilateral femoroacetabular impingement syndrome (FAIS) with the asymptomatic-side hip muscle CSA and to determine whether correlations exist between the hip muscle CSA and preoperative pain level, preoperative symptom duration, and postoperative function. METHODS: We performed a retrospective review of magnetic resonance imaging data of patients who underwent hip arthroscopy from January 2012 through June 2015 for the treatment of unilateral FAIS and who had a minimum of 2 years' follow-up after hip arthroscopy for FAIS...
March 26, 2019: Arthroscopy: the Journal of Arthroscopic & related Surgery
Latifah Al Mana, Ryan P Coughlin, Veeral Desai, Nicole Simunovic, Andrew Duong, Olufemi R Ayeni
PURPOSE OF REVIEW: To present an updated systematic review of the indications and outcomes of open and arthroscopic labral reconstruction. Due to the increasing popularity and recognition, the arthroscopic procedure has gained in recent years, the aim was to assess for changes in indications, graft selection, and improvement in outcomes within the last 5 years. RECENT FINDINGS: A total of nine eligible studies (six case series, one cohort, and two retrospective comparative studies) with a total of 234 patients (265 hips), and an average 12/16 (non-comparative studies) and 20/24 (comparative studies) quality on the MINORS score were included in this review...
March 27, 2019: Current Reviews in Musculoskeletal Medicine
Tamaya Van Criekinge, Jordi Vermeulen, Keanu Wagemans, Jonas Schröder, Elissa Embrechts, Steven Truijen, Ann Hallemans, Wim Saeys
PURPOSE: The aim of this systematic review was to determine the number of muscle synergies and the distribution of muscle weightings in stroke patients during gait. MATERIAL AND METHODS: This review is registered on PROSPERO (number: CRD42018088701) and is written following the PRISMA guidelines. A systematic search was conducted using following databases: PubMed, Web of Science, Naric, Cochrane and PEDro. Methodological quality was assessed by the Newcastle-Ottawa Scale and data extraction (subject characteristics, outcome measures and walking protocols) was performed by two independent researchers...
March 23, 2019: Disability and Rehabilitation
Willemke Nijholt, Lies Ter Beek, Johannes S M Hobbelen, Hester van der Vaart, Johan B Wempe, Cees P van der Schans, Harriët Jager-Wittenaar
BACKGROUND AND AIMS: Malnutrition and sarcopenia are common nutrition (-related) disorders in patients with COPD and are associated with negative health outcomes and mortality. This study aims to correlate ultrasound measured rectus femoris size with fat-free mass and muscle function in patients with COPD. METHODS: Patients with COPD, at the start of a pulmonary rehabilitation program, were asked to participate in this study. Rectus femoris (RF) size (thickness in cm, cross-sectional area [CSA] in cm2 ) was determined by ultrasound...
April 2019: Clinical Nutrition ESPEN
Branten J Page, Oliver D Mrowczynski, Russell A Payne, Sarah E Tilden, Hector Lopez, Elias Rizk, Kimberly Harbaugh
In peripheral nerve surgery, repair of the femoral nerve (FN) requires identification of normal nerve elements both proximal and distal to the level of the injury. We identified FN branches to the sartorius (SRT) and quadriceps muscles in 16 embalmed specimens and calculated the length of each branch to its point of entry into its respective muscle. The SRT and rectus femoris (RF) muscles were mobilized but not transected to mimic the surgical approach. Ratios of the length of each motor branch as a unit of the total length of the thigh, defined as the FN at the inguinal ligament to the superior margin of the patella were also calculated...
January 14, 2019: Curēus
S M Robbins, M Morelli, P A Martineau, N St-Onge, M Boily, R Dimentberg, J Antoniou
OBJECTIVE: The objective was to compare muscle activation and knee mechanics during gait between participants with non-traumatic knee osteoarthritis (OA), post-traumatic knee OA, and healthy adults. DESIGN: Participants with non-traumatic knee OA (n = 22), post-traumatic knee OA (n = 19), and healthy adults (n = 22) completed gait trials for this observational, cross-sectional study. Post-traumatic OA group had a history of traumatic anterior cruciate ligament (ACL) rupture...
March 18, 2019: Osteoarthritis and Cartilage
Javier Sánchez-Sánchez, Jorge García-Unanue, Enrique Hernando, Jorge López-Fernández, Enrique Colino, Manuel León-Jiménez, Leonor Gallardo
The aim of this study was to analyse the influence of age category on the performance and muscle response after a Repeated Sprint Ability (RSA) test in elite youth soccer players. 62 soccer players from three different age categories (Under 14 [ n = 21], Under 16 [ n = 20], and Under 18 [ n = 21]) were selected to participate in this study. Players completed an RSA test (7 × 30 m) with a 20-s recovery between sprints. The muscular response to an electrical stimulus before and after the test of both the biceps femoris (BF) and the rectus femoris (RF) were evaluated using tensiomyography...
2019: Frontiers in Physiology
Muhammad Osama, Reem Javed Malik
'Salat' is a Muslim prayer mandatory for all Muslims five times a day. It is comparable to performing a mildintensity exercise, because most of the joints and musclesundergo exercise during different positions and movements adopted in Salat. Though Salat is practised by all Muslims, evidence is very limited regarding the biomechanics and therapeutic effects of Salat as an exercise. However, literature shows activation of biceps brachii, triceps brachii, pectoralis major, scapular musculature, rectus femoris, biceps femoris, tibialis anterior and gastrocnemius during different postures of Salat...
March 2019: JPMA. the Journal of the Pakistan Medical Association
Helmy Gueldich, Firas Zghal, Rihab Borji, Hamdi Chtourou, Sonia Sahli, Haithem Rebai
The aim of the present study was to investigate the effects of Ramadan intermittent fasting (RIF) on the underlying mechanisms of force production capacity during maximal voluntary isometric contraction (MVIC) using the superimposed twitch technique. Ten healthy male physical education students performed three MVIC of the knee extensor superimposed with nerve electrical stimulation during four testing phases: one week before Ramadan (BR), at the end of the first week of Ramadan (R-1), during the fourth week of Ramadan (R-4) and two weeks after Ramadan (AR)...
March 20, 2019: Chronobiology International
Xiaoguang Liu, Mengnan Li, Liling Wang, Yan Wang, Xiuling Liu, Hongrui Wang
Muscle fatigue has widespread application in the field of rehabilitation medicine. The paper studies the muscle fatigue using surface electromyogram (sEMG) in the background of rehabilitation training system. The sEMG and ventilatory threshold of vastus lateralis, rectus femoris and erector spinae are collected synchronously and the electromyogram fatigue threshold (EMG FT ) of different sEMG was analyzed by increasing load cycling experiments of 10 healthy subjects. This paper also analyzes the effect of isotonic and isometric contraction on EMG FT ...
February 25, 2019: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
Sili He, Wentao Jiang, Ruiqi Dong, Fei Yan, Zhi Xu, Yubo Fan
This study analyzed the inherent relation between arterial blood mass flow and muscle atrophy of residual limb to provide some necessary information and theoretical support for the clinical rehabilitation of lower limb amputees. Three-dimensional arterial model reconstruction was performed on both intact side and residual limb of a unilateral transfemoral amputee who is the subject. Then hemodynamic calculation was carried out to comparatively analyze the mass flow state at each arterial outlet of both lower extremities...
February 25, 2019: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
Minoru Yamada, Yosuke Kimura, Daisuke Ishiyama, Naohito Nishio, Yuhei Otobe, Tomoya Tanaka, Shunsuke Ohji, Shingo Koyama, Atsushi Sato, Mizue Suzuki, Hideyuki Ogawa, Takeo Ichikawa, Daisuke Ito, Hidenori Arai
AIM: The objective of this trial was to investigate the synergistic effects of bodyweight resistance exercise and a protein supplement with vitamin D on skeletal muscle in sarcopenic or dynapenic older adults. METHODS: This was a four-arm randomized controlled trial. Sarcopenic or dynapenic older adults were recruited for this trial. After screening, a total of 112 older adults were randomly allocated among four groups; 28 older adults each were enrolled in the combined resistance exercise and nutritional supplementation group, the exercise alone group, the nutritional supplementation alone group, and the control group...
March 13, 2019: Geriatrics & Gerontology International
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