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Dynamic postural stability

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https://www.readbyqxmd.com/read/29775954/a-new-methodology-based-on-functional-principal-component-analysis-to-study-postural-stability-post-stroke
#1
M Luz Sánchez-Sánchez, Juan-Manuel Belda-Lois, Silvia Mena-Del Horno, Enrique Viosca-Herrero, Celedonia Igual-Camacho, Beatriz Gisbert-Morant
BACKGROUND: A major goal in stroke rehabilitation is the establishment of more effective physical therapy techniques to recover postural stability. Functional Principal Component Analysis provides greater insight into recovery trends. However, when missing values exist, obtaining functional data presents some difficulties. The purpose of this study was to reveal an alternative technique for obtaining the Functional Principal Components without requiring the conversion to functional data beforehand and to investigate this methodology to determine the effect of specific physical therapy techniques in balance recovery trends in elderly subjects with hemiplegia post-stroke...
May 5, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29765190/evaluating-equilibrium-in-anterior-cruciate-ligament-reconstruction
#2
REVIEW
Forough Ferdowsi, Zahra Sadat Rezaeian
[Purpose] The purpose of this review was to summarize available methods and equipment which are administered to evaluate the balance in anterior cruciate ligament reconstruction. [Subjects and Methods] A literature search was performed and reviewed using the narrative approach. This study reviewed English articles concerning balance assessment methods in anterior cruciate ligament reconstruction subjects from 1985 to 2015 using the following key words: Anterior Cruciate Ligament Injury, Anterior Cruciate Ligament Reconstruction, Postural Control, Equilibrium, Balance and Stability...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29753125/adaptation-of-kinematic-synergy-and-postural-control-to-mechanical-ankle-constraint-on-an-unsteady-stance-surface
#3
Yi-Ying Tsai, Gwo-Ching Chang, Ing-Shiou Hwang
Joint constraint interferes with the coordinative structure in joint movements used to optimize postural stability. This study aimed to investigate changes in postural synergy when the ankle joints were bilaterally braced during a stabilometer stance. Twenty-four young adults stood on a stabilometer plate while wearing a pair of ankle-foot orthoses, which were either unlocked or locked to restrict ankle motion (the ankle constraint (AC) and non-constraint (NC) conditions). Although ankle constraint did not significantly affect the dynamics of the stabilometer movements, the size and regularity of the first principal component (PC1), which explained more than 80% of the variance of joint movements in the lower limb, were increased...
May 9, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29747067/more-symmetrical-gait-after-split-belt-treadmill-walking-does-not-modify-dynamic-and-postural-balance-in-individuals-post-stroke
#4
Carole Miéville, Séléna Lauzière, Martina Betschart, Sylvie Nadeau, Cyril Duclos
Spontaneous gait is often asymmetrical in individuals post-stroke, despite their ability to walk more symmetrically on demand. Given the sensorimotor deficits in the paretic limb, this asymmetrical gait may facilitate balance maintenance. We used a split-belt walking protocol to alter gait asymmetry and determine the effects on dynamic and postural balance. Twenty individuals post-stroke walked on a split-belt treadmill. In two separate periods, the effects of walking with the non-paretic leg, and then the paretic one, on the faster belt on spatio-temporal symmetry and balance were compared before and after these perturbation periods...
April 24, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29740569/kinetic-analysis-of-downward-step-posture-according-to-the-foothold-heights-and-visual-information-blockage-in-cargo-truck
#5
Seung-Hyun Hyun, Che-Cheong Ryew
The study was undertaken to compare and analyze kinetic variables during downward foot-on according to the foothold heights under interrupted-visual information on 25-t cargo truck. Skilled adult male drivers (n=10) engaged in cargo truck driving over 1 year participated in the experiment. The results obtained from cinematographic and ground reaction force data during downward foot-on as follows; First, leg stiffness, peak vertical force (PVF) and loading rate showed significant difference as an increase of foothold heights, that is, interrupted-visual information showed greater impulse force than as was not...
April 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29718807/regulation-of-dynamic-postural-control-to-attend-manual-steadiness-constraints
#6
Luis Augusto Teixeira, Joane Figueiredo Serpa Coutinho, Daniel Boari Coelho
In daily living activities, performance of spatially accurate manual movements in upright stance depends on postural stability. In the present investigation, we aimed to evaluate the effect of the required manual steadiness (task constraint) on the regulation of dynamic postural control. A single group of young participants (n=20) were evaluated in the performance of a dual posturo-manual task of balancing on a platform oscillating in sinusoidal translations at 0.4 Hz (low) or 1 Hz (high) frequencies while stabilizing a cylinder on a handheld tray...
May 2, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29704750/active-mechanosensory-feedback-during-locomotion-in-the-zebrafish-spinal-cord
#7
REVIEW
Steven Knafo, Claire Wyart
The investigation of mechanosensory feedback to locomotion has been hindered by the challenge of recording neurons in motion. Genetic accessibility and optical transparency of zebrafish larvae provide means to revisit this question. Glutamatergic Rohon-Beard (RB) and GABAergic CSF-contacting neurons (CSF-cNs) are spinal mechanosensory neurons. Recent studies combining bioluminescence, silencing and optogenetic activation show that mechanosensory neurons enhance speed and stabilize posture during locomotion...
April 25, 2018: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/29692699/a-control-scheme-that-uses-dynamic-postural-synergies-to-coordinate-a-hybrid-walking-neuroprosthesis-theory-and-experiments
#8
Naji A Alibeji, Vahidreza Molazadeh, Brad E Dicianno, Nitin Sharma
A hybrid walking neuroprosthesis that combines functional electrical stimulation (FES) with a powered lower limb exoskeleton can be used to restore walking in persons with paraplegia. It provides therapeutic benefits of FES and torque reliability of the powered exoskeleton. Moreover, by harnessing metabolic power of muscles via FES, the hybrid combination has a potential to lower power consumption and reduce actuator size in the powered exoskeleton. Its control design, however, must overcome the challenges of actuator redundancy due to the combined use of FES and electric motor...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29689764/a-speed-based-approach-to-vestibular-rehabilitation-for-peripheral-vestibular-hypofunction-a-retrospective-chart-review
#9
Robert Alan Roller, Courtney D Hall
BACKGROUND: Current vestibular rehabilitation for peripheral vestibular hypofunction is an exercise-based approach that improves symptoms and function in most, but not all patients, and includes gaze stabilization exercises focused on duration of head movement. One factor that may impact rehabilitation outcomes is the speed of head movement during gaze stability exercises. OBJECTIVE: Examine outcomes of modified VOR X1 exercises that emphasize a speed-based approach for gaze stabilization while omitting substitution and habituation exercises...
April 18, 2018: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29672558/the-effects-of-unexpected-mechanical-perturbations-during-treadmill-walking-on-spatiotemporal-gait-parameters-and-the-dynamic-stability-measures-by-which-to-quantify-postural-response
#10
Forough Madehkhaksar, Jochen Klenk, Kim Sczuka, Katharina Gordt, Itshak Melzer, Michael Schwenk
Most falls occur after a loss of balance following an unexpected perturbation such as a slip or a trip. Greater understanding of how humans control and maintain stability during perturbed walking may help to develop appropriate fall prevention programs. The aim of this study was to examine changes in spatiotemporal gait and stability parameters in response to sudden mechanical perturbations in medio-lateral (ML) and anterior-posterior (AP) direction during treadmill walking. Moreover, we aimed to evaluate which parameters are most representative to quantify postural recovery responses...
2018: PloS One
https://www.readbyqxmd.com/read/29668375/evaluation-of-pelvis-postural-systems-in-spinal-cord-injury-patients-outcome-research
#11
Serena Dattoli, Mariele Colucci, Maria Grazia Soave, Rita De Santis, Leandro Segaletti, Claudia Corsi, Marco Tofani, Donatella Valente, Giovanni Galeoto
OBJECTIVES: Compare three commercially available postural systems to determine the best for treatment of patients suffering from spinal cord injury lesion below the cervical spine. DESIGN: Outcome Research. SETTING: Ambulatory. PARTICIPANTS: Thirteen patients were recruited for this study between March 2016 and July 2016 from the Occupational Therapy clinic of "Policlinico Umberto I" hospital in Rome and Occupational Therapy of "CPO" hospital in Ostia...
April 18, 2018: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29668299/effects-of-using-insoles-of-different-thicknesses-in-older-adults-which-thickness-has-the-best-impact-on-postural-stability-and-risk-of-falling
#12
Öznur Büyükturan, Serdar Demirci, Buket Büyükturan, Yavuz Yakut
BACKGROUND: Postural stability (PS) problems arise as an individual grows older, and as a result, risk of falling (RoF) increases in older adults. The purpose of this study was to examine the effects of insoles of various thicknesses on PS and RoF in older adults. METHODS: Fifty-six individuals participated in the study. PS and RoF were evaluated both statically and dynamically using Biodex Balance System. PS and RoF assessments were perfomed under five different conditions: 1) barefoot, 2) only shoes, 3) with 5 mm insole, 4) with 10 mm insole, 5) with 15 mm insole...
April 18, 2018: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/29653405/modeling-margin-of-stability-with-feet-in-place-following-a-postural-perturbation-effect-of-altered-anthropometric-models-for-estimated-extrapolated-centre-of-mass
#13
Keaton A Inkol, Andrew H Huntley, Lori Ann Vallis
BACKGROUND: Maintaining the centre of mass (CoM) of the body within the base of support is a critical component of upright balance; the ability to accurately quantify balance recovery mechanisms is critical for many research teams. RESEARCH QUESTION: The purpose of this study was to investigate how exclusion of specific body segments in an anthropometric CoM model influenced a dynamic measure of postural stability, the margin of stability (MoS), following a support-surface perturbation...
March 30, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29607762/hip-strength-and-range-of-movement-are-associated-with-dynamic-postural-control-performance-in-individuals-scheduled-for-arthroscopic-hip-surgery
#14
Matthew Freke, Joanne Kemp, Adam Semciw, Kevin Sims, Trevor Russell, Parminder Singh, Kay Crossley
Study Design Cross-sectional. Background Hip pain is associated with reduced muscle strength and range of movement (ROM). These impairments may contribute to decreased postural stability and balance. The Star Excursion Balance Test (SEBT) is a reliable and valid method to measure dynamic postural control. Objectives To evaluate the association between SEBT performance and hip strength, hip ROM, trunk endurance, and group characteristics in individuals with hip pain. Methods One hundred eleven individuals with hip pain, scheduled for arthroscopic hip surgery, were matched with 62 healthy controls...
April 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29601222/effects-of-dance-based-movement-therapy-on-balance-gait-and-psychological-functions-in-severe-cerebellar-ataxia-a-case-study
#15
Yong-Gwan Song, Young-Uk Ryu, Seung-Jin Im, Ye-Seung Lee, Jin-Hoon Park
PURPOSE: Individuals in the later stages of cerebellar ataxia usually experience serious balance and immobility problems. Currently, there is a lack of adequate rehabilitative programs for individuals with severe cerebellar ataxia that can help improve ataxia-related motor impairment. The purpose of the present study was to explore the potential physiotherapeutic benefits of partnered dance on balance, motor functions, and psychological well-being in an individual demonstrating severe cerebellar ataxia symptoms...
March 30, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29589078/effects-of-a-cognitive-dual-task-on-variability-and-local-dynamic-stability-in-sustained-repetitive-arm-movements-using-principal-component-analysis-a-pilot-study
#16
Alessia Longo, Peter Federolf, Thomas Haid, Ruud Meulenbroek
In many daily jobs, repetitive arm movements are performed for extended periods of time under continuous cognitive demands. Even highly monotonous tasks exhibit an inherent motor variability and subtle fluctuations in movement stability. Variability and stability are different aspects of system dynamics, whose magnitude may be further affected by a cognitive load. Thus, the aim of the study was to explore and compare the effects of a cognitive dual task on the variability and local dynamic stability in a repetitive bimanual task...
March 27, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29581654/the-effects-of-shoulder-stabilization-exercises-and-pectoralis-minor-stretching-on-balance-and-maximal-shoulder-muscle-strength-of-healthy-young-adults-with-round-shoulder-posture
#17
Mi-Kyoung Kim, Jung Chul Lee, Kyung-Tae Yoo
[Purpose] The purpose of this study was to analyze the effects of pectoralis minor stretching and shoulder strengthening with an elastic band on balance and maximal shoulder muscle strength in young adults with rounded shoulder posture. [Subjects and Methods] Nineteen subjects with rounded shoulder posture were randomly divided into 2 groups: a shoulder stabilization exercise group and a stretching exercise group. The groups performed each exercise for 40 minutes, 3 times a week, for 4 weeks. Static balance (eyes open and closed), dynamic balance (the limits of stability in 4 directions) and shoulder muscle strength in 5 directions were measure before and after the exercises...
March 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29563049/noisy-vestibular-stimulation-increases-gait-speed-in-normals-and-in-bilateral-vestibulopathy
#18
Shinichi Iwasaki, Chisato Fujimoto, Naoya Egami, Makoto Kinoshita, Fumiharu Togo, Yoshiharu Yamamoto, Tatsuya Yamasoba
BACKGROUND: Galvanic vestibular stimulation delivered as zero-mean current noise (noisy GVS) has been shown to improve static and dynamic postural stability probably by enhancing vestibular information. OBJECTIVE: /Hypothesis: To examine the effect of an imperceptible level of noisy GVS on dynamic locomotion in normal subjects as well as in patients with bilateral vestibulopathy. METHODS: Walking performance of 19 healthy subjects and 12 patients with bilateral vestibulopathy at their preferred speed was examined during application of noisy GVS with an amplitude ranging from 0 to 1000 μA...
March 10, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29562564/innovative-robotic-hippotherapy-improves-postural-muscle-size-and-postural-stability-during-the-quiet-stance-and-gait-initiation-in-a-child-with-cerebral-palsy-a-single-case-study
#19
Ji-Ho Park, Joshua Sung H You
BACKGROUND: Postural instability is an important pathomarker in children with cerebral palsy (CP), and is often implicated in gait disturbance. OBJECTIVE: The purpose of this study was to investigate the therapeutic effects of long-term robotic hippotherapy (HPOT) on postural muscles size and static and dynamic postural stability in a child with CP. METHODS: Ultrasonography was used to measure postural muscles size. We also evaluated the magnitude of the separation between the center of pressure (COP) and center of mass (COM) during quiet stance and gait initiation (GI) using an eight-camera motion capture system and two force plates...
2018: NeuroRehabilitation
https://www.readbyqxmd.com/read/29550696/does-kinesiology-tape-counter-exercise-related-impairments-of-balance-in-the-elderly
#20
Simona Hosp, Robert Csapo, Dieter Heinrich, Michael Hasler, Werner Nachbauer
BACKGROUND: Maintaining balance is an essential requirement for the performance of daily tasks and sporting activities, particularly in older adults to prevent falls and associated injuries. Kinesiology tape has gained great popularity in sports and is frequently used as a tool for performance enhancement. However, there is little research investigating its influence on balance. RESEARCH QUESTION: The purpose of this study was to evaluate the effect of Kinesiology tape on dynamic balance, postural stability and knee proprioception after physical activity in healthy, older adults...
March 10, 2018: Gait & Posture
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