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Postural stability

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https://www.readbyqxmd.com/read/28431622/quantitative-biomechanical-assessment-of-trunk-control-in-huntington-s-disease-reveals-more-impairment-in-static-than-dynamic-tasks
#1
Deb A Kegelmeyer, Sandra K Kostyk, Nora E Fritz, Marianne M Fiumedora, Ajit Chaudhari, Marilly Palettas, Gregory Young, Anne D Kloos
Postural instability is common in individuals with Huntington's disease (HD), yet little is known about control of the trunk during static and dynamic activities. We compared the trunk motion of 41 individuals with HD and 36 controls at thoracic and pelvic levels during sitting, standing, and walking using wearable iPod sensors. We also examined the ability of individuals with HD to respond to an auditory cue to modify trunk position when the pelvis moved >8° in sagittal or frontal planes during sitting using custom software...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28425239/an-8-week-thoracic-spine-stabilization-exercise-program-improves-postural-back-pain-spine-alignment-postural-sway-and-core-endurance-in-university-students-a-randomized-controlled-study
#2
Şeyda Toprak Çelenay, Derya Özer Kaya
BACKGROUND/AIM: To investigate the effects of an 8-week thoracic stabilization exercise program on back pain, spinal alignment, postural sway, and core endurance in university students. MATERIALS AND METHODS: University students were randomly allocated into exercise (n: 28) and control (n: 25) groups. The exercise program was carried out 3 days a week for 8 weeks. Postural pain, spinal alignment, postural sway, and core endurance were assessed via visual analogue scale, Spinal Mouse, Biodex Balance System, and McGill's trunk muscle endurance tests at the baseline and after 8 weeks of training...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28425221/conceptualizing-movement-by-expert-bobath-instructors-in-neurological-rehabilitation
#3
Julie Vaughan-Graham, Kara Patterson, Karl Zabjek, Cheryl A Cott
RATIONALE, AIMS, AND OBJECTIVES: Movement, a core aspect of physiotherapy practice, and integral to the clinical reasoning process has undergone limited theoretical development. Instead, research has focused on intervention effectiveness embedded within the positivist paradigm. The purpose of this study was to explore how expert neurorehabilitation therapists conceptualize movement as part of their clinical reasoning. METHOD: A qualitative interpretive descriptive approach consisting of stimulated recall using video-recorded treatment sessions and in-depth interviews was used...
April 20, 2017: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/28420971/dynamic-increase-in-corticomuscular-coherence-during-bilateral-cyclical-ankle-movements
#4
Takashi Yoshida, Kei Masani, Karl Zabjek, Robert Chen, Milos R Popovic
In humans, the midline primary motor cortex is active during walking. However, the exact role of such cortical participation is unknown. To delineate the role of the primary motor cortex in walking, we examined whether the primary motor cortex would activate leg muscles during movements that retained specific requirements of walking (i.e., locomotive actions). We recorded electroencephalographic and electromyographic signals from 15 healthy, young men while they sat and performed bilateral, cyclical ankle movements...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28415899/specific-muscle-synergies-in-national-elite-female-ice-hockey-players-in-response-to-unexpected-external-perturbation
#5
Minhee Kim, Yushin Kim, Hyeyoung Kim, BumChul Yoon
This study aimed to investigate specific muscle synergies in elite ice hockey players indicating highly developed postural control strategies used to restore balance against unexpected external perturbations. Seven elite athletes (EA) on the women's national ice hockey team and 7 non-athletes (NA) participated in this study. Based on trajectories of centre of mass (COM), analysis periods were divided into an initial phase (a balance disturbance after perturbation onset) and a reversal phase (a balance recovery response), respectively...
April 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28411444/continuous-and-difficult-discrete-cognitive-tasks-promote-improved-stability-in-older-adults
#6
Yves Lajoie, Deborah A Jehu, Natalie Richer, Alan Chan
Directing attention away from postural control and onto a cognitive task affords the emergence of automatic control processes. Perhaps the continuous withdrawal of attention from the postural task facilitates an automatization of posture as opposed to only intermittent withdrawal; however this is unknown in the aging population. Twenty older adults (69.9±3.5years) stood with feet together on a force platform for 60s while performing randomly assigned discrete and continuous cognitive tasks. Participants were instructed to stand comfortably with their arms by their sides while verbally responding to the auditory stimuli as fast as possible during the discrete tasks, or mentally performing the continuous cognitive tasks...
April 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28411441/longitudinal-gait-and-balance-decline-in-friedreich-s-ataxia-a-pilot-study
#7
Theresa A Zesiewicz, Jeannie B Stephenson, Seok Hun Kim, Kelly L Sullivan, Israt Jahan, Yangxin Huang, Jason L Salemi, Lynn Wecker, Jessica D Shaw, Clifton L Gooch
INTRODUCTION: Friedreich's Ataxia (FA) is a devastating, progressive, neurodegenerative disease. Objective measures that detect changes in neurological function in FA patients are needed to facilitate therapeutic clinical trials. The purpose of this pilot study was to analyze longitudinal changes in gait and balance in subjects with FA using the GAITRite Walkway System(®) and Biodex Balance System™, respectively, and to test the ability of these measures to detect change over time compared to the Friedreich's Ataxia Rating Scale (FARS)...
March 30, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28410250/effects-of-antigravity-treadmill-training-on-gait-balance-and-fall-risk-in-children-with-diplegic-cerebral-palsy
#8
Shamekh Mohamed El-Shamy
OBJECTIVE: The aim of this study was to investigate the effects of antigravity treadmill training on gait, balance, and fall risk in children with diplegic cerebral palsy. DESIGN: Thirty children with diplegic cerebral palsy were selected for this randomized controlled study. They were randomly assigned to (1) an experimental group that received antigravity treadmill training (20 mins/d, 3 d/wk) together with traditional physical therapy for 3 successive mos and (2) a control group that received only traditional physical therapy program for the same period...
April 13, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28409515/effects-of-stretching-and-fatigue-on-peak-torque-muscle-imbalance-and-stability
#9
Pablo B Costa, Cassio V Ruas, Cory M Smith
BACKGROUND: The present study examined the acute effects of hamstrings stretching and fatigue on knee extension and flexion peak torque (PT), hamstrings to quadriceps (H:Q) ratio, and postural stability. METHODS: Seventeen women (mean ± SD age = 21.8 ± 2.1 yrs; body mass = 63.0 ± 10.5 kg; height = 164.7 ± 6.2 cm) and eighteen men (25.8 ± 4.6 yrs; 83.6 ± 13.2 kg; 175.3 ± 6.0 cm) took part in three laboratory visits. The first visit was a familiarization session, and the subsequent two visits were randomly assigned as a control or stretching condition...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28408876/effects-of-age-related-macular-degeneration-on-postural-sway
#10
Hortense Chatard, Laure Tepenier, Olivier Jankowski, Antoine Aussems, Alain Allieta, Talal Beydoun, Sawsen Salah, Maria P Bucci
Purpose: To compare the impact of unilateral vs. bilateral age-related macular degeneration (AMD) on postural sway, and the influence of different visual conditions. The hypothesis of our study was that the impact of AMD will be different between unilateral and bilateral AMD subjects compared to age-matched healthy elderly. Methods: Postural stability was measured with a platform (TechnoConcept®) in 10 elderly unilateral AMD subjects (mean age: 71.1 ± 4.6 years), 10 elderly bilateral AMD subjects (mean age: 70...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28400662/early-anterior-cruciate-ligament-reconstruction-can-save-meniscus-without-any-complications
#11
Chang-Ik Hur, Eun-Kyoo Song, Sung-Kyu Kim, Seung-Hun Lee, Jong-Keun Seon
BACKGROUND: Early ACL reconstruction, before retuning to activity eliminates recurrent episodes of instability and thereby decreases chances of meniscal and cartilage injury. However, there are no clear and uniform guidelines regarding the timing of ACL reconstruction or clarity in the definition of early and delayed reconstruction to reduce the complications after reconstruction in the ACL injured knee. The purpose of this study was to compare the clinical outcome, stability, muscle power, and postural control after early and delayed anterior cruciate ligament (ACL) reconstruction...
March 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28399877/overground-vs-treadmill-based-robotic-gait-training-to-improve-seated-balance-in-people-with-motor-complete-spinal-cord-injury-a-case-report
#12
Amanda E Chisholm, Raed A Alamro, Alison M M Williams, Tania Lam
BACKGROUND: Robotic overground gait training devices, such as the Ekso, require users to actively participate in triggering steps through weight-shifting movements. It remains unknown how much the trunk muscles are activated during these movements, and if it is possible to transfer training effects to seated balance control. This study was conducted to compare the activity of postural control muscles of the trunk during overground (Ekso) vs. treadmill-based (Lokomat) robotic gait training, and evaluate changes in seated balance control in people with high-thoracic motor-complete spinal cord injury (SCI)...
April 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28398555/biophysical-and-functional-characterization-of-hippocalcin-mutants-responsible-for-human-dystonia
#13
Nordine Helassa, Svetlana V Antonyuk, Lu-Yun Lian, Lee P Haynes, Robert D Burgoyne
Dystonia is a neurological movement disorder that forces the body into twisting, repetitive movements or sometimes painful abnormal postures. With the advent of next-generation sequencing technologies, the homozygous mutations T71N and A190T in the neuronal calcium sensor (NCS) hippocalcin were identified as the genetic cause of primary isolated dystonia (DYT2 dystonia). However, the effect of these mutations on the physiological role of hippocalcin has not yet been elucidated. Using a multidisciplinary approach, we demonstrated that hippocalcin oligomerises in a calcium-dependent manner and binds to voltage-gated calcium channels...
April 7, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28396629/effects-of-changing-body-weight-distribution-on-mediolateral-stability-control-during-gait-initiation
#14
Teddy Caderby, Eric Yiou, Nicolas Peyrot, Xavier de Viviés, Bruno Bonazzi, Georges Dalleau
During gait initiation, anticipatory postural adjustments (APA) precede the execution of the first step. It is generally acknowledged that these APA contribute to forward progression but also serve to stabilize the whole body in the mediolateral direction during step execution. Although previous studies have shown that changes in the distribution of body weight between both legs influence motor performance during gait initiation, it is not known whether and how such changes affect a person's postural stability during this task...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28396008/short-latency-muscle-response-patterns-to-multi-directional-unpredictable-perturbations-to-balance-applied-to-the-arm-are-context-dependent
#15
Ali Forghani, Richard Preuss, Theodore Edgar Milner
A number of studies have shown that sensory inputs from the hand can have a profound effect in stabilizing upright posture. This suggests that the central nervous system can extract information about body motion and external forces acting on the body from cutaneous sensory signals. We have recently shown that the central nervous system determines the direction of an unpredictable force applied to the hand so rapidly that it is able to activate ankle muscles in advance of the perturbing effect that this force has at the ankles...
April 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/28392246/the-two-faces-of-postural-control-in-older-adults-stability-and-function
#16
Ruth Rath, Michael G Wade
No abstract text is available yet for this article.
March 25, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28390128/masticatory-muscle-activity-evaluation-by-electromyography-in-subjects-with-zygomatic-implants
#17
M de Rossi, M Palinkas, B Lucas, C Santos, M Semprini, L Oliveira, I Regalo, E Bersani, R Miglioranca, S Siéssere, S Regalo
BACKGROUND: Zygomatic implants are an alternative treatment in the rehabilitation of atrophic maxilla to promote stability in the stomatognathic system. The aim of this study was to compare the electromyographic (EMG) activity of masseter and temporalis muscles in controls and in individuals with complete implant-supported dentures anchored in the zygomatic bone. MATERIALS AND METHODS: Fifty-four volunteers of both genders (mean age 52.5 years) were selected and distributed into two groups: Individuals with zygomatic implant (ZIG; n=27) and fully dentate patients (CG; n=27)...
April 8, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28388780/effect-of-footwear-on-dynamic-stability-during-single-leg-jump-landings
#18
Bradley J Bowser, William C Rose, Robert McGrath, Jilian Salerno, Joshua Wallace, Irene S Davis
Barefoot and minimal footwear running has led to greater interest in the biomechanical effects of different types of footwear. The effect of running footwear on dynamic stability is not well understood. The purpose of this study was to compare dynamic stability and impact loading across 3 footwear conditions; barefoot, minimal footwear and standard running shoes. 25 injury free runners (21 male, 4 female) completed 5 single-leg jump landings in each footwear condition. Dynamic stability was assessed using the dynamic postural stability index and its directional components (mediolateral, anteroposterior, vertical)...
April 7, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28388290/the-role-of-postural-support-in-young-adults-control-of-stationary-kicking
#19
Ben Sidaway, Matthew Bouchard, Julie Chasse, Jonathan Dunn, Andrea Govoni, Breanne McPherson, Katherine Roy, David I Anderson
PURPOSE: The requirement for postural stability during the performance of motor skills has been clearly demonstrated in infants, but the necessity for such a postural substrate is not well documented in adults. The present study investigated the role of postural stability during a ballistic ball-kicking task in adults by providing varying degrees of external postural support. METHOD: In the 1st experiment, 30 participants performed 20 maximal-velocity kicks under each of 3 conditions: grasping a rigid stable handle, light fingertip touch, and grasping a suspended elastic tube...
April 7, 2017: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/28387693/visual-vestibular-processing-deficits-in-mild-traumatic-brain-injury
#20
W G Wright, R T Tierney, J McDevitt
BACKGROUND: The search for reliable and valid signs and symptoms of mild traumatic brain injury (mTBI), commonly synonymous with concussion, has lead to a growing body of evidence that individuals with long-lasting, unremitting impairments often experience visual and vestibular symptoms, such as dizziness, postural and gait disturbances. OBJECTIVE: Investigate the role of visual-vestibular processing deficits following concussion. METHODS: A number of clinically accepted vestibular, oculomotor, and balance assessments as well as a novel virtual reality (VR)-based balance assessment device were used to assess adults with post-acute concussion (n = 14) in comparison to a healthy age-matched cohort (n = 58)...
2017: Journal of Vestibular Research: Equilibrium & Orientation
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