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https://www.readbyqxmd.com/read/28728077/comparison-of-spinal-stability-following-motor-control-and-general-exercises-in-nonspecific-chronic-low-back-pain-patients
#1
MohammadBagher Shamsi, Javad Sarrafzadeh, Aliashraf Jamshidi, Navid Arjmand, Farshid Ghezelbash
BACKGROUND: Motor control exercise was claimed to improve spinal stability in patients with chronic non-specific back pain, but to investigate the effectiveness of this exercise, other outcome measures have been used rather than spinal stability itself. The aim of our study is to assess motor control exercise effects on spinal stability using a biomechanical model. METHODS: Fifty-one patients were assigned to either motor control or general exercises. Before and after trainings, participants were tested for spinal stability at seven isometric tasks...
July 8, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28725192/commentary-proceedings-of-the-first-workshop-on-peripheral-machine-interfaces-going-beyond-traditional-surface-electromyography
#2
COMMENT
Philipp Beckerle
No abstract text is available yet for this article.
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28723717/localized-muscle-vibration-reverses-quadriceps-muscle-hypotrophy-and-improves-physical-function-a-clinical-and-electrophysiological-study
#3
Maria Grazia Benedetti, Gennaro Boccia, Lorenzo Cavazzuti, Elena Magnani, Elisabetta Mariani, Alberto Rainoldi, Roberto Casale
Quadriceps weakness has been associated with knee osteoarthritis (OA). High-frequency localized muscle vibration (LMV) has been proposed recently for quadriceps strengthening in patients with knee OA. The purpose of this study was (a) to investigate the clinical effectiveness of high-frequency LMV on quadriceps muscle in patients with knee OA and (b) to disentangle, by means of surface electromyography (sEMG), the underlying mechanism. Thirty patients, aged between 40 and 65 years, and clinically diagnosed with knee OA were included in this randomized, controlled, single-blinded pilot study...
July 18, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28723713/somatotopic-fascicular-lesions-of-the-brachial-plexus-demonstrated-by-high-resolution-magnetic-resonance-neurography
#4
Tim Hilgenfeld, Johann Jende, Daniel Schwarz, Philipp Bäumer, Jennifer Kollmer, Sabine Heiland, Martin Bendszus, Mirko Pham
OBJECTIVES: The aim of this study was to evaluate whether high-resolution brachial plexus (BP) magnetic resonance neurography (MRN) is capable of (1) distinguishing patients with compressive neuropathy or noncompressive plexopathy from age- and sex-matched controls, (2) discriminating between patients with compressive neuropathy and noncompressive plexopathy, and (3) detecting spatial lesion patterns suggesting somatotopic organization of the BP. MATERIALS AND METHODS: Thirty-six patients (50...
July 18, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28719094/discovery-and-characterization-of-a-novel-tryptophan-hydroxylase-1-inhibitor-as-a-prodrug
#5
Hailong Shi, Yaya Cui, Yifei Qin
Serotonin (5-HT) is an important neurotransmitter and paracrine signaling molecule in the gastrointestinal tract. Two distinct tryptophan hydroxylases (TPH), TPH1 and TPH2 are the rate-limiting enzymes in the 5-HT biosynthesis process. TPH1 expression is mainly limited in the enterochromaffin cells and distributed in peripheries such as the skin and gut, while TPH2 is the predominant isoform in the CNS. In this study, mol002291 was screened as a drug-like compound from the TCM database for the inhibitor of TPH...
July 18, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28718344/knee-extensor-fatigue-developed-during-high-intensity-exercise-limits-lower-limb-power-production
#6
Steven J O'bryan, François Billaut, Janet L Taylor, David M Rouffet
We investigated the association between changes in vastii electromyography (EMG) and knee extensor fatigue during high-intensity cycling, and the subsequent effect on lower-limb power and intermuscular coordination during all-out cycling. On two separate days, participants completed 30-s all-out cycling or 10-min of high-intensity cycling followed by 30-s all-out cycling. EMG for gluteus maximus (GMAX), rectus femoris (RF), vastii (VAS), hamstrings (HAM) and gastrocnemius (GAS); co-activation for GMAX/RF, VAS/HAM and VAS/GAS; isometric maximal voluntary force (IMVF) and resting twitch (RT) of the knee extensors were measured...
July 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28717626/muscle-fatigue-in-participants-of-indoor-cycling
#7
Ricardo de Melo Dos Santos, Flavio Costa E Costa, Thais Sepeda Saraiva, Bianca Callegari
BACKGROUND: Indoor Cycling (IC) has been gaining recognition and popularity within recent years and few studies have investigated its benefits for sedentary participants. OBJECTIVE: The aim of this study was to evaluate differences in the surface electromyography (sEMG) variables, heart rate (HR), and subjective effort in sedentary participants while they performed an IC session and to compare their results with the trained subjects, to answer the question: Are trained cyclists less susceptible to muscle fatigue, since it is expected that they make less effort? DESIGN: Twenty-six volunteers were split into two groups according to their fitness status and weekly training load...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717523/assessment-of-emotional-expressions-after-full-face-transplantation
#8
Çağdaş Topçu, Hilmi Uysal, Ömer Özkan, Özlenen Özkan, Övünç Polat, Merve Bedeloğlu, Arzu Akgül, Ela Naz Döğer, Refik Sever, Nur Ebru Barçın, Kadriye Tombak, Ömer Halil Çolak
We assessed clinical features as well as sensory and motor recoveries in 3 full-face transplantation patients. A frequency analysis was performed on facial surface electromyography data collected during 6 basic emotional expressions and 4 primary facial movements. Motor progress was assessed using the wavelet packet method by comparison against the mean results obtained from 10 healthy subjects. Analyses were conducted on 1 patient at approximately 1 year after face transplantation and at 2 years after transplantation in the remaining 2 patients...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28717355/correlation-of-creatine-kinase-levels-with-clinical-features-and-survival-in-amyotrophic-lateral-sclerosis
#9
Hongfei Tai, Liying Cui, Yuzhou Guan, Mingsheng Liu, Xiaoguang Li, Dongchao Shen, Dawei Li, Bo Cui, Jia Fang, Qingyun Ding, Kang Zhang, Shuangwu Liu
OBJECTIVE: To evaluate serum creatine kinase (CK) levels of amyotrophic lateral sclerosis (ALS) patients and to explore the relationship between CK levels and the clinical characteristics and survival prognosis of ALS patients. METHODS: We analyzed the CK levels of 185 ALS patients who underwent long-term follow-up. The relationship between CK levels and clinical features including sex, age, disease duration, site of onset, body mass index (BMI), serum creatinine (Cr), and spontaneous electromyographic activity was analyzed by univariate analysis and multiple linear regression...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28717078/dermatomyositis-induced-by-hepatitis-b-virus-related-hepatocellular-carcinoma-a-case-report-and-review-of-the-literature
#10
Jen-Wei Chou, Yin-Lan Lin, Ken-Sheng Cheng, Po-Yuan Wu, Teressa Reanne Ju
Dermatomyositis or polymyositis as a paraneoplastic syndrome of hepatocellular carcinoma (HCC) is an uncommon event. Few cases have been reported in the literature. We herein report the case of a 55-year-old man with chronic hepatitis B and alcoholism who presented with skin rash. Abdominal computed tomography revealed multiple hypervascular liver tumors consistent with HCC. He subsequently developed dysphagia with proximal limb weakness. Laboratory tests and electromyography demonstrated inflammatory myopathy...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28716538/reliability-of-pelvic-floor-muscle-electromyography-tested-on-healthy-women-and-women-with-pelvic-floor-muscle-dysfunction
#11
Irene Koenig, Helena Luginbuehl, Lorenz Radlinger
OBJECTIVES: Electromyography (EMG) is a well-established method to quantify the relative pelvic floor muscle (PFM) activity. PFM EMG has shown good reliability in healthy women. However, its reliability has not been tested in women with PFM dysfunction. The reliability of EMG analysis methods concerning EMG normalization needs to be determined to assess specific therapeutic interventions. Therefore, the aim of this study was to investigate the intra-session reliability of PFM EMG variables by using 3 different analysis methods in women with PFM dysfunction...
July 14, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28715712/propriospinal-cutaneous-induced-emg-suppression-is-unaltered-by-anodal-tdcs-of-healthy-motor-cortex
#12
Alana B McCambridge, James W Stinear, Sarah Peek, Winston D Byblow
OBJECTIVE: Cervical propriospinal premotoneurons (PN) relay descending motor commands and integrate peripheral afferent feedback. Effects of anodal transcranial direct current stimulation (a-tDCS) on propriospinal excitability in the upper limbs are unknown. METHODS: Healthy right-handed adults received a-tDCS or sham tDCS over primary motor cortex (M1) at 1mA (Experiment 1, n=18) or 2mA current intensity (Experiment 2, n=15). Propriospinal excitability was assessed by suppression of background electromyography (EMG) in extensor carpi radialis (ECR) from electrical stimulation of the superficial radial nerve during bilateral (Experiment 1 and 2) or unilateral (Experiment 2 only) activation of the left and/or right ECR...
June 28, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28714838/lower-extremity-muscle-activity-kinematics-and-dynamic-postural-control-in-individuals-with-patellofemoral-pain
#13
Shiho Goto, Naoko Aminaka, Phillip A Gribble
CONTEXT: Altered lower extremity muscle activity has been suggested to be associated with lower extremity kinematics in individuals with patellofemoral pain (PFP). However, few studies examined these relationships and the results are inconsistent. OBJECTIVES: To compare the lower extremity muscle activity, kinematics, pain level, and reach distance during the anterior reach of the Star Excursion Balance Test (SEBT) between participants with PFP and healthy individuals (CON)...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28714764/abdominal-hollowing-reduces-lateral-trunk-displacement-during-single-leg-squats-in-healthy-females-but-does-not-affect-peak-hip-abduction-angle-or-knee-abductio-angle-moment
#14
Lukas D Linde, Jessica Archibald, Eve C Lampert, John Z Srbely
CONTEXT: Females suffer 4-6 times more non-contact anterior cruciate ligament (ACL) injuries than males due to neuromuscular control deficits of the hip musculature leading to increases in hip adduction angle, knee abduction angle, and knee abduction moment during dynamic tasks such as single-leg squats. Lateral trunk displacement has been further related to ACL injury risk in females, leading to the incorporation of core strength/stability exercises in ACL preventative training programs...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28714757/comparative-effects-of-four-single-leg-squat-exercises-in-subjects-with-gluteus-medius-weakness
#15
Hae-Rim Han, Chung-Hwi Yi, Sung-Hyun You, Heon-Seock Cynn, One-Bin Lim, Jae-Ik Son
CONTEXT: Of the weight bearing exercises, single leg squat (SLS) represents one of the most commonly used hip strengthening exercises that require more gluteus medius (GMED) activity. To date, no studies have investigated how the four SLS exercises affects muscle imbalance of GMED, tensor fasciae latae (TFL), and adductor longus (AL), and kinematics of hip. OBJECTIVE: To investigate the hip muscle activities, onset time, and kinematics during four different SLS exercises (unilateral squat, unilateral wall-squat, lateral step-down, and front step-down) in subjects with GMED weakness...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28714749/the-influence-of-verbal-and-tactile-feedback-on-electromyographic-amplitude-of-the-shoulder-musculature-during-common-therapeutic-exercises
#16
Sean A Jones, Derek N Pamukoff, Timothy C Mauntel, J Troy Blackburn, Joseph B Myers
CONTEXT: Verbal and tactile feedback during rehabilitation exercises can improve muscle activation, thus improving the therapeutic benefits. However, it is unclear which feedback method elicits the greatest electromyographic (EMG) amplitude. OBJECTIVE: To determine if the addition of tactile to verbal feedback increases EMG amplitude of selected shoulder musculature during scapular plane elevation (Y's), shoulder horizontal abduction with external rotation (T's), and scapular retraction with external rotation (W's)...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28714587/stretchable-dry-electrodes-with-concentric-ring-geometry-for-enhancing-spatial-resolution-in-electrophysiology
#17
Kaiping Wang, Udit Parekh, Tejaswy Pailla, Harinath Garudadri, Vikash Gilja, Tse Nga Ng
The multichannel concentric-ring electrodes are stencil printed on stretchable elastomers modified to improve adhesion to skin and minimize motion artifacts for electrophysiological recordings of electroencephalography, electromyography, and electrocardiography. These dry electrodes with a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate interface layer are optimized to show lower noise level than that of commercial gel disc electrodes. The concentric ring geometry enables Laplacian filtering to pinpoint the bioelectric potential source with spatial resolution determined by the ring distance...
July 17, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28713810/a-biomechanical-comparison-of-proportional-electromyography-control-to-biological-torque-control-using-a-powered-hip-exoskeleton
#18
Aaron J Young, Hannah Gannon, Daniel P Ferris
BACKGROUND: Despite a large increase in robotic exoskeleton research, there are few studies that have examined human performance with different control strategies on the same exoskeleton device. Direct comparison studies are needed to determine how users respond to different types of control. The purpose of this study was to compare user performance using a robotic hip exoskeleton with two different controllers: a controller that targeted a biological hip torque profile and a proportional myoelectric controller...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28711602/contribution-of-5-ht2a-receptors-on-diaphragmatic-recovery-after-chronic-cervical-spinal-cord-injury
#19
Kun-Ze Lee, Elisa J Gonzalez-Rothi
Unilateral C2 spinal cord hemisection (C2Hx) interrupts bulbospinal respiratory pathways innervating ipsilateral phrenic motoneurons, resulting in cessation of ipsilateral diaphragm motor output. Plasticity within the spinal neural circuitry controlling the diaphragm can induce partial recovery of phrenic bursting which correlates with the time-dependent return of spinal serotonin (5-HT) immunoreactivity in the vicinity of phrenic motoneurons. The 5-HT2A receptor subtype is present on phrenic motoneurons and its expression is up-regulated after cervical spinal cord injury; however the functional role of these receptors following injury has not been clearly defined...
July 12, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28709418/single-leg-squat-performance-in-physically-and-non-physically-active-individuals-a-cross-sectional-study
#20
Silvia Gianola, Greta Castellini, Elena Stucovitz, Alice Nardo, Giuseppe Banfi
BACKGROUND: Single-leg squat (SLS) is a functional test visually rated by clinicians for assessing lower limb function as a preventive injury strategy. SLS clinical rating is a qualitative evaluation and it does not count objective outcomes as kinematics data and surface electromyography (sEMG) assessment. Based on the SLS rating, the aims of this study were (i) to determine the clinical rating agreement among six raters and (ii) to assess kinematic and sEMG predictors of good SLS performance in physically and non-physically active individuals...
July 14, 2017: BMC Musculoskeletal Disorders
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