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https://www.readbyqxmd.com/read/29335773/effects-of-combining-ergonomic-interventions-and-motor-control-exercises-on-muscle-activity-and-kinematics-in-people-with-work-related-neck-shoulder-pain
#1
Sharon M H Tsang, Billy C L So, Rufina W L Lau, Jie Dai, Grace P Y Szeto
PURPOSE: This study compared the effects of "Ergomotor" intervention and conventional physiotherapy, on influencing the motor control in the neck-shoulder region in people with work-related neck-shoulder pain (WRNSP). METHODS: 101 patients (age range 20-54 years) diagnosed with chronic WRNSP were randomized into control (CO) group (n = 50) and Ergomotor (EM) group (n = 51). Each group received a 12-week intervention. Participants in CO group received treatment for pain relief and general exercises...
January 15, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29334165/3d-printing-of-liquid-crystal-elastomeric-actuators-with-spatially-programed-nematic-order
#2
Arda Kotikian, Ryan L Truby, John William Boley, Timothy J White, Jennifer A Lewis
Liquid crystal elastomers (LCEs) are soft materials capable of large, reversible shape changes, which may find potential application as artificial muscles, soft robots, and dynamic functional architectures. Here, the design and additive manufacturing of LCE actuators (LCEAs) with spatially programed nematic order that exhibit large, reversible, and repeatable contraction with high specific work capacity are reported. First, a photopolymerizable, solvent-free, main-chain LCE ink is created via aza-Michael addition with the appropriate viscoelastic properties for 3D printing...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29332059/analysis-of-skeletal-muscle-performance-using-piezoelectric-film-sensors
#3
Anat Ratnovsky, Emanuel Kusayev, Sara Naftali
A flexible piezoelectric thin film sensor has been proposed recently in several studies for detection of muscle movements. The objective of this study was to investigate the ability of this sensor to assess skeletal muscle performance and fatigue under isokinetic contractions. Simultaneous noninvasive measurements of muscles activity were done using surface electromyography (EMG) electrodes and two thin film piezoelectric sensors. Measurements were taken from the biceps during slow and fast elbow flexion with and without strong grip, during different weight lifting and from the gastrocnemius during treadmill marching at speeds of 4 and of 10 kph...
January 5, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29332031/difference-of-the-thickness-and-activation-of-trunk-muscles-during-static-stoop-lift-at-different-loads-between-subjects-with-and-without-low-back-pain
#4
Hoe-Song Yang
BACKGROUND: Patients suffering from low back pain (LBP) have been reported to alter muscle contraction strategies. OBJECTIVE: To compare activity and thickness of the trunk muscles (external oblique (EO), internal oblique (IO), transversus abdominis (TrA), and lumbar multifidus (LM)) during static stoop lift at different lifting loads between the subjects with and without LBP. METHODS: Twenty eight subjects with LBP and twenty healthy subjects were recruited...
December 29, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29276459/immediate-effect-of-lumbar-mobilization-on-activity-of-erector-spinae-and-lumbar-multifidus-muscles
#5
Fahed Mehyar, Marcio Santos, Sara E Wilson, Vincent S Staggs, Neena K Sharma
Objective: The purpose of this study was to investigate the effect of grade IV lumbar mobilization on the activity/contraction of erector spinae (ES) and lumbar multifidus (LM) muscles in healthy people. Methods: A randomized, repeated-measures design was used. Sixteen healthy subjects attended 3 testing sessions with a different intervention in each session (no intervention, grade IV central lumbar mobilization at L4, and placebo/light touch). Lying in a prone position, subjects lifted a light weight with their right arm while ultrasound images of LM and surface electromyography signals of ES were captured before and immediately after application of the intervention in the session...
December 2017: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/29220323/grasp-performance-of-a-soft-synergy-based-prosthetic-hand-a-pilot-study
#6
Alycia S Gailey, Sasha Blue Godfrey, Ryan E Breighner, Karen L Andrews, Kristin D Zhao, Antonio Bicchi, Marco Santello
Current prosthetic hands are frequently rejected in part due to limited functionality and versatility. We assessed the feasibility of a novel prosthetic hand, the SoftHand Pro (SHP), whose design combines soft robotics and hand postural synergies. Able-bodied subjects ( ) tracked cursor motion by opening and closing the SHP and performed a grasp-lift-hold-release (GLHR) task with a sensorized cylindrical object of variable weight. The SHP control was driven by electromyographic (EMG) signals from two antagonistic muscles...
December 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29171976/right-versus-left-side-bridge-static-endurance-ability-among-healthy-collegiate-students-at-taibah-university
#7
Tarek M El-Gohary, Samiha M Abd Elkader, Hatem A Emara, Mahmoud I Ibrahim, Osama A Khaled, Mostafa S Ahmed
BACKGROUND: Spinal muscles endurance is fundamental for providing adequate trunk stability. OBJECTIVE: The purpose of this study was to compare the side bridge static endurance ability of the right versus left side. METHODS: Forty right hand dominant students, aged between 18 and 25 years, were recruited from Taibah University. Every participant had to lie down on his side and bear trunk weight on the arm with shoulder abducted to 90∘ and elbow flexed to 90∘...
November 17, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29106420/a-small-graphene-oxide-sheet-polyvinylidene-fluoride-bilayer-actuator-with-large-and-rapid-responses-to-multiple-stimuli
#8
Guochuang Xu, Miao Zhang, Qinqin Zhou, Hongwu Chen, Tiantian Gao, Chun Li, Gaoquan Shi
A high-performance actuator should be able to deliver large-shape deformations, fast actuations and sensitive responses to multiple stimuli. Here, we report such an actuator constructed from one layer of polyvinylidene fluoride (PVDF) with a high coefficient of thermal expansion (CTE), and another layer of small sheets of graphene oxide (SGO) with a negative CTE. The opposite deformations of both actuation layers make the SGO/PVDF bilayer actuator highly sensitive to the temperature stimulus with a large bending sensitivity of 1...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29089111/trunk-response-and-stability-in-standing-under-sagittal-symmetric-pull-push-forces-at-different-orientations-elevations-and-magnitudes
#9
Z El Ouaaid, A Shirazi-Adl, A Plamondon
To reduce lifting and associated low back injuries, manual material handling operations often involve pulling-pushing of carts at different weights, orientations, and heights. The loads on spine and risk of injury however need to be investigated. The aim of this study was to evaluate muscle forces, spinal loads and trunk stability in pull-push tasks in sagittal-symmetric, static upright standing posture. Three hand-held load magnitudes (80, 120 and 160 N) at four elevations (0, 20, 40 and 60 cm to the L5-S1) and 24 force directions covering all pull/push orientations were considered...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29076958/gluteus-maximus-and-hamstring-activation-during-selected-weight-bearing-resistance-exercises
#10
Kevin McCurdy, John Walker, Derrick Yuen
McCurdy, K, Walker, J, and Yuen, D. Gluteus maximus and hamstring activation during selected weight-bearing resistance exercises. J Strength Cond Res XX(X): 000-000, 2017-The purpose of this study was to compare the gluteus maximus (GM) and hamstring group (HG) electromyographic (EMG) activation levels among selected weight-bearing resistance exercises. Eighteen young adult females with previous resistance training experience completed the study. Strength was assessed on the bilateral squat (BS) (3 repetition maximum [RM]), modified single-leg squat (MSLS) (3RM), and stiff-leg deadlift (SLDL) (8RM) to determine an 8RM load for all lifts...
October 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29075819/augmentation-mastopexy-with-a-dermal-encapsulated-round-or-anatomic-autoprosthesis
#11
Safvet Ors
INTRODUCTION: Several factors, such as aging, pregnancy, and weight loss, reduce the elasticity of the breast tissue, and ptosis occurs. Due to aging and gravity, it is not possible to completely prevent breast ptosis. The goal is to delay the recurrence of ptosis as much as possible. PATIENTS AND METHODS: This study included 20 female patients aged 25-55 years. The patients who underwent surgery had different levels of ptosis. Although the patients wanted their breasts to be lifted and an increase in projection, they did not want implants to be used...
October 26, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29064986/male-surgical-neck-rejuvenation
#12
REVIEW
Ronald L Moy, Lauren Moy
BACKGROUND: Patients who are aging, with weight gain, and increased skin laxity, request dermatologists to improve their neck area. Surgical and nonsurgical options are reviewed as well as benefits and side effects. This article will focus on how surgical techniques can be applied for male patients in particular. OBJECTIVE: To review surgical neck rejuvenation therapies available currently to find the best option for male patients. CONCLUSION: Surgical treatment of the male neck to improve mandibular contour and loose neck skin requires tightening of the platysmal muscle and usually skin removal in the postauricular sulcus and into the hairline...
November 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29059498/respiratory-reflex-generated-by-movement-of-the-arms
#13
Ranjit K Mal
In their article "Motor control of the trunk during a modified clean and jerk lift", Eriksson Crommert, Ekblom and Thortensson(1) measured the intra-abdominal pressure (IAP) and trunk muscle activity at various stages of lifting a 30-kg weight. They observed that the "TrA (transversus abdominis muscle) was more active in a position with augmented postural demand, i.e., with the arms above the head" and that "The activation of TrA was relatively low in the lower parts of the lift, despite a higher load in terms of imposed flexor moment (judged from the sketches in the figures, not calculated) corroborated by increases in ES activation and IAP amplitude, both providing the extensor moment necessary to raise the trunk...
October 23, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29054327/sex-differences-in-anticipatory-postural-adjustments-during-rapid-single-leg-lift
#14
Melanie D Bussey, Marcelo Peduzzi de Castro, Daniela Aldabe, Jonathan Shemmell
The aim of this study was to assess the influence of sex on the kinetic, kinematic and neuromuscular correlates of anticipatory postural adjustments (APAs) during a single leg lift task performed by healthy participants. Fifty healthy age and body mass index matched participants (25 women and 25 men) performed 20 single leg lift task (hip flexion to 90 ° as quickly as possible) with their dominant and their non-dominant lower limbs. A force plate was used to determine the medial-lateral displacement of the center of pressure (COPML), and the initiation of weight shift (T0); kinematics was used to determine leg lift (T1); and electromyography was used to determine onset times from eight muscles: bilateral external oblique, internal oblique and lumbar multifidus, and unilateral (stance limb) gluteus maximus and biceps femoris...
October 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28965479/effects-of-the-weight-configuration-of-hand-load-on-trunk-musculature-during-static-weight-holding
#15
Saman Madinei, Xiaopeng Ning
The performance of manual material handling tasks is one major cause of lower back injuries. In the current study, we investigated the influence of the weight configuration of hand loads on trunk muscle activities and the associated spinal stability. Thirteen volunteers each performed static weight holding tasks using two different 9 kg weight bars (with medial and lateral weight configurations) at two levels of heights (low and high) and one fixed horizontal distance (which resulted in constant spinal joint moment across conditions)...
October 2, 2017: Ergonomics
https://www.readbyqxmd.com/read/28932006/a-newly-developed-floor-chair-placed-on-an-office-chair-reduces-lumbar-muscle-fatigue-by-cyclically-changing-its-lumbar-supporting-shape
#16
Tadamitsu Matsuda, Takayuki Koyama, Yasushi Kurihara, Miki Tagami, Yasuaki Kusumoto, Osamu Nitta
[Purpose] This study investigated lumbar muscle fatigue before and after maintaining a seated position for one hour, lumbar and pelvic inclination angle change, in subjects with and without active lumber support. [Subjects and Methods] Fourteen healthy subjects randomized into two groups sat on a floor chair, placed on an office chair, that cyclically changed its lumbar supporting shape to provide active lumbar support (ALS) or no ALS for one hour. Before and after, we measured the frequency of muscle waveforms of the trunk extensor muscles when the subjects lifted an object weighing 10% of their body weight, using both hands while seated...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28900561/effects-of-a-band-loop-on-lower-extremity-muscle-activity-and-kinematics-during-the-barbell-squat
#17
Ryan C A Foley, Brittany D Bulbrook, Duane C Button, Michael W R Holmes
BACKGROUND: Medial knee collapse can signal an underlying movement issue that, if uncorrected, can lead to a variety of knee injuries. Placing a band around the distal thigh may act as a proprioceptive aid to minimize medial collapse of the knee during squats; however, little is known about EMG and biomechanics in trained and untrained individuals during the squat with an elastic band added. HYPOTHESIS/PURPOSE: To investigate the effects of the TheraBand® Band Loop on kinematics and muscle activity of the lower extremity during a standard barbell back squat at different intensities in both trained and untrained individuals...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28813796/feedforward-model-based-arm-weight-compensation-with-the-rehabilitation-robot-armin
#18
Fabian Just, Ozhan Ozen, Stefano Tortora, Robert Riener, Georg Rauter
Highly impaired stroke patients at early stages of recovery are unable to generate enough muscle force to lift the weight of their own arm. Accordingly, task-related training is strongly limited or even impossible. However, as soon as partial or full arm weight support is provided, patients are enabled to perform arm rehabilitation training again throughout an increased workspace. In the literature, the current solutions for providing arm weight support are mostly mechanical. These systems have components that restrict the freedom of movement or entail additional disturbances...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28727649/variables-affecting-intra-abdominal-pressure-during-lifting-in-the-early-postpartum-period
#19
Yvonne Hsu, Robert Hitchcock, Stefan Niederauer, Ingrid E Nygaard, Janet M Shaw, Xiaoming Sheng
OBJECTIVES: Intra-abdominal pressure (IAP) may contribute to pelvic floor health, although the direction and magnitude of such an effect, if any, are not yet known. Identifying individual characteristics, and in particular modifiable factors, associated with higher IAP during recovery from vaginal childbirth might serve to mitigate early pelvic floor dysfunction. The aim of this study was to identify characteristics associated with maximal IAP during lifting in postpartum primiparous women who delivered vaginally...
July 20, 2017: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/28695558/rehabilitation-in-patients-with-pulmonary-arterial-hypertension
#20
Stephan Keusch, Alexander Turk, Stéphanie Saxer, Nicola Ehlken, Ekkehard Grunig, Silvia Ulrich, On Behalf Of The Swiss Society Of Pulmonary Hypertension
Exertional dyspnoea is a leading symptom in patients with pulmonary arterial hypertension (PAH). Patients suffering from PAH report poor quality of life, have skeletal muscle dysfunction and in the absence of advanced medical therapy deteriorate progressively due to right heart failure which can lead to death. For decades, patients with PAH were advised to avoid exercise in fear of exacerbated right heart failure. Recently, it has been shown that a highly supervised rehabilitation programme in expert centres leads to significant improvements in symptoms, quality of life, exercise capacity and may even enhance haemodynamics in selected stable patients treated with advanced regimens of PAH-targeted drugs...
July 11, 2017: Swiss Medical Weekly
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