keyword
MENU ▼
Read by QxMD icon Read
search

gait stability

keyword
https://www.readbyqxmd.com/read/28324949/muscle-synergy-analysis-in-transtibial-amputee-during-ramp-ascending-activity
#1
P Mehryar, M S Shourijeh, H F Maqbool, M Torabi, A A Dehghani-Sanij
In developed countries, the highest number of amputees are elderly with transtibial amputation. Walking on inclined surfaces is difficult for amputees due to loss of muscle volume and strength thereby transtibial amputees (TA) rely on the intact limb to maintain stability. The aim of this study was to use the concatenated non-negative matrix factorization (CNMF) technique to calculate muscle synergy components and compare the difference in muscle synergies and their associated activation profiles in the healthy and amputee groups during ramp ascending (RA) activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28319133/effects-of-sudden-walking-perturbations-on-neuromuscular-reflex-activity-and-three-dimensional-motion-of-the-trunk-in-healthy-controls-and-back-pain-symptomatic-subjects
#2
Juliane Mueller, Tilman Engel, Steffen Mueller, Josefine Stoll, Heiner Baur, Frank Mayer
BACKGROUND: Back pain patients (BPP) show delayed muscle onset, increased co-contractions, and variability as response to quasi-static sudden trunk loading in comparison to healthy controls (H). However, it is unclear whether these results can validly be transferred to suddenly applied walking perturbations, an automated but more functional and complex movement pattern. There is an evident need to develop research-based strategies for the rehabilitation of back pain. Therefore, the investigation of differences in trunk stability between H and BPP in functional movements is of primary interest in order to define suitable intervention regimes...
2017: PloS One
https://www.readbyqxmd.com/read/28302314/a-new-measure-of-trip-risk-integrating-minimum-foot-clearance-and-dynamic-stability-across-the-swing-phase-of-gait
#3
Brian W Schulz
Minimum toe clearance (MTC) is thought to quantify the risk of the toe contacting the ground during the swing phase of gait and initiating a trip, but there are methodological issues with this measure and the risk of trip-related falls has been shown to also be associated with gait speed and dynamic stability. This paper proposes and evaluates a new measure, trip risk integral (TRI), that circumvents many issues with MTC as typically calculated at a single point by considering minimum foot clearance across the entire swing phase and taking into account dynamic stability to estimate risk of falling due to a trip rather than risk of the foot contacting the floor...
February 27, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28299643/retention-of-the-first-trial-effect-in-gait-slip-among-community-living-older-adults
#4
Xuan Liu, Tanvi Bhatt, Shuaijie Wang, Feng Yang, Yi-Chung Clive Pai
"First-trial effect" characterizes the rapid adaptive behavior that changes the performance outcome (from fall to non-fall) after merely a single exposure to postural disturbance. The purpose of this study was to investigate how long the first-trial effect could last. Seventy-five (≥ 65 years) community-dwelling older adults, who were protected by an overhead full body harness system, were retested for a single slip 6-12 months after their initial exposure to a single gait-slip. Subjects' body kinematics that was used to compute their proactive (feedforward) and reactive (feedback) control of stability was recorded by an eight-camera motion analysis system...
February 2017: Geroscience
https://www.readbyqxmd.com/read/28297181/the-biomechanical-and-energetic-advantages-of-a-mediolaterally-wide-pelvis-in-women
#5
Cara M Wall-Scheffler, Marcella J Myers
Here, we argue that two key shifts in thinking are required to more clearly understand the selection pressures shaping pelvis evolution in female hominins: (1) the primary locomotor mode of female hominins was loaded walking in the company of others, and (2) the periodic gait of human walking is most effectively explained as a biomechanically controlled process related to heel-strike collisions that is tuned for economy and stability by properly-timed motor inputs (a model called dynamic walking). In the light of these two frameworks, the evidence supports differences between female and male upper-pelvic morphology being the result of the unique reproductive role of female hominins, which involved moderately paced, loaded walking in groups...
April 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28293751/linear-and-nonlinear-gait-features-in-older-adults-walking-on-inclined-surfaces-at-different-speeds
#6
Marcus Fraga Vieira, Fábio Barbosa Rodrigues, Gustavo Souto de Sá E Souza, Rina Márcia Magnani, Georgia Cristina Lehnen, Adriano O Andrade
This study evaluated linear and nonlinear gait features in healthy older adults walking on inclined surfaces at different speeds. Thirty-seven active older adults (experimental group) and fifty young adults (control group) walked on a treadmill at 100% and ±20% of their preferred walking speed for 4 min under horizontal (0%), upward (UP) (+8%), and downward (DOWN) (-8%) conditions. Linear gait variability was assessed using the average standard deviation of trunk acceleration between strides (VAR). Gait stability was assessed using the margin of stability (MoS)...
March 14, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28291734/safety-assessment-of-the-aqueous-extract-of-the-flowers-of-nymphaea-lotus-linn-nymphaeaceae-acute-neuro-and-subchronic-oral-toxicity-studies-in-albinos-wistar-rats
#7
Mireille Kameni Poumeni, Danielle Claude Bilanda, Paul Désiré Dzeufiet Djomeni, Yolande Sandrine Mengue Ngadena, Marguerite Francine Mballa, Madeleine Chantal Ngoungoure, Agnès Carolle Ouafo, Théophile Dimo, Pierre Kamtchouing
BACKGROUND: Nymphaea lotus Linn (N. lotus) is a medicinal plant widely used in Cameroon popular medicine, to treat neuropsychiatric conditions, male sexual disorders or as food supplement. However, scientific data on the pharmacotoxic profile of this plant are not available. The safety of N. lotus was assessed in acute, neuro- and subchronic toxicity studies by following the OECD guidelines. Effectively, no data have been published until now in regard to its safety on the nervous system...
March 14, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28285142/effects-of-hip-abduction-and-adduction-accuracy-on-post-stroke-gait
#8
Jesse C Dean, Aaron E Embry, Katy H Stimpson, Lindsay A Perry, Steven A Kautz
BACKGROUND: Gait instability often limits post-stroke function, although the mechanisms underlying this instability are not entirely clear. Our recent work has suggested that one possible factor contributing to post-stroke gait instability is a reduced ability to accurately control foot placement. The purpose of the present experiments was to investigate whether post-stroke gait function is related to the ability to accurately abduct and adduct the hip, as required for accurate foot placement...
March 2, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28284144/effects-of-visual-deprivation-on-stability-among-young-and-older-adults-during-treadmill-walking
#9
Fabricio Saucedo, Feng Yang
The purposes of this study were 1) to investigate the effect of visual deprivation on stability during treadmill walking in older and young adults, and 2) to examine if such an effect differs between age groups. Under the protection of a safety harness, 10 young (23.20±2.44years) and six older adults (67.83±2.48years) participants performed two 90-s walking trials (one with eyes open or EO and the other with eyes closed or EC) at their self-selected treadmill walking speeds determined during EO walking. The step length, step width, foot landing angle, the duration of stance phase, and cadence were calculated from the foot kinematics collected for each participant...
March 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28271903/effects-of-corrective-taping-on-balance-and-gait-in-patients-with-hallux-valgus
#10
Gozde Gur, Ozden Ozkal, Burcu Dilek, Songul Aksoy, Nilgun Bek, Yavuz Yakut
BACKGROUND: Taping is an effective temporary therapy for improving hallux valgus (HV) in adults. Although HV has been demonstrated to impair postural balance, there is a lack of information about how corrective taping affects balance and gait patterns in adults with HV deformity. METHODS: Eighteen middle-aged female patients (average age, 53.5 years) with HV were included. Corrective tape was applied to correct HV angulation. A series of balance and gait stability tests were performed before applying tape and 1 hour after the tape was applied with a Balance Master computerized posturography device...
December 1, 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/28269706/a-stimulation-driven-exoskeleton-for-walking-after-paraplegia
#11
Sarah R Chang, Mark J Nandor, Lu Li, Kevin M Foglyano, John R Schnellenberger, Rudi Kobetic, Roger D Quinn, Ronald J Triolo
An untethered version of a stimulation-driven exoskeleton was evaluated for its ability to restore walking after paralysis from spinal cord injury. The hybrid neuroprosthesis (HNP) combined a passive variable-constraint exoskeleton for stability and support with functional neuromuscular stimulation (FNS) to contract the paralyzed muscles to drive limb movement. This self-contained HNP was operated by an onboard controller that sampled sensor signals, generated appropriate commands to both the exoskeletal constraints and integrated stimulator, and transmitted data wirelessly via Bluetooth to an off-board computer for real-time monitoring and recording for offline analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269309/a-control-method-for-transfemoral-prosthetic-knees-in-level-walking-and-stair-ascending-based-on-thigh-angular-motion
#12
K Inoue, A Pripunnochai, T Wada
Regaining the locomotive ability is necessary to maintain the activities of daily living in lower extremity amputees. Recently, the stability of the gait and multifunctionality of transfemoral prosthetic knees have drastically improved with the use of microprocessor-controlled knees, such as Genium ® (Otto Bock, GmbH). However, these knees, which also include products from other companies, are very expensive. Therefore, the purpose of the present study was to develop a control method for transfemoral prosthetic knees in order to perform level walking and stairs ascending safely, with fewer sensors or simpler procedures...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268650/detection-of-compensatory-balance-responses-using-wearable-electromyography-sensors-for-fall-risk-assessment
#13
Mina Nouredanesh, Sunil L Kukreja, James Tung
Loss of balance is prevalent in older adults and populations with gait and balance impairments. The present paper aims to develop a method to automatically distinguish compensatory balance responses (CBRs) from normal gait, based on activity patterns of muscles involved in maintaining balance. In this study, subjects were perturbed by lateral pushes while walking and surface electromyography (sEMG) signals were recorded from four muscles in their right leg. To extract sEMG time domain features, several filtering characteristics and segmentation approaches are examined...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267989/responses-to-gait-perturbations-in-stroke-survivors-who-prospectively-experienced-falls-or-no-falls
#14
Michiel Punt, Sjoerd M Bruijn, Sanne Roeles, Ingrid G van de Port, Harriet Wittink, Jaap H van Dieën
BACKGROUND: Steady-state gait characteristics appear promising as predictors of falls in stroke survivors. However, assessing how stroke survivors respond to actual gait perturbations may result in better fall predictions. We hypothesize that stroke survivors who fall have a diminished ability to adequately adjust gait characteristics after gait is perturbed. This study explored whether gait characteristics of perturbed gait differ between fallers and non fallers. METHOD: Chronic stroke survivors were recruited by clinical therapy practices...
February 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28264903/longitudinal-quasi-static-stability-predicts-changes-in-dog-gait-on-rough-terrain
#15
Simon Wilshin, Michelle A Reeve, G Clark Haynes, Shai Revzen, Daniel E Koditschek, Andrew J Spence
Legged animals utilize gait selection to move effectively and must re-cover from environmental perturbations. We show that on rough terrain domestic dogs, Canis lupus familiaris, spend more time in longitudinal quasi-statically stable patterns of movement. Here longitudinal refers to the rostro-caudal, axis. We used an existing model in the literature to quantify the longitudinal quasi-static stability of gaits neighbouring the walk, and found that trot-like gaits are more stable. We thus hypothesized that when perturbed, the rate of return to a stable gait would depend on the direction of perturbation, such that perturbations towards less quasi-statically stable patterns of movement would be more rapid than those towards more stable patterns of movement...
March 6, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28259041/trunk-sway-in-idiopathic-normal-pressure-hydrocephalus-quantitative-assessment-in-clinical-practice
#16
Tomas Bäcklund, Jennifer Frankel, Hanna Israelsson, Jan Malm, Nina Sundström
BACKGROUND: In diagnosis and treatment of patients with idiopathic normal pressure hydrocephalus (iNPH), there is need for clinically applicable, quantitative assessment of balance and gait. Using a body-worn gyroscopic system, the aim of this study was to assess postural stability of iNPH patients in standing, walking and during sensory deprivation before and after cerebrospinal fluid (CSF) drainage and surgery. A comparison was performed between healthy elderly (HE) and patients with various types of hydrocephalus (ventriculomegaly (VM))...
February 24, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28254638/deliberately-light-interpersonal-contact-affects-the-control-of-head-stability-during-walking-in-children-and-adolescents-with-cerebral-palsy
#17
Katrin Hanna Schulleri, Frauke Burfeind, Beate Höß-Zenker, Éva Feketené Szabó, Nadine Herzig, Annick Ledebt, Leif Johannsen
OBJECTIVE: To evaluate the potential of deliberately light interpersonal touch (IPT) for reducing excessive head and trunk sway during self-paced walking in children and adolescents with cerebral palsy (CP). DESIGN: Quasi-experimental, proof-of-concept study with between-groups comparison. SETTING: Ambulant care facility, community center. PARTICIPANTS: 26 individuals with CP (spastic and ataxic; GMFCS I-III; mean=9...
February 27, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28244503/validation-of-the-instrumented-evaluation-of-spatio-temporal-gait-parameters-in-patients-with-motor-incomplete-spinal-cord-injury
#18
A I Pérez-Sanpablo, J Quinzaños-Fresnedo, R Loera-Cruz, I Quiñones-Uriostegui, G R Reyes, R Pérez-Zavala
STUDY DESIGN: Observational, descriptive, transversal. OBJECTIVES: To evaluate the validity and reliability of spatio-temporal gait parameters measured by GaitRite in motor incomplete spinal cord-injured (SCI) patients. SETTING: National Institute of Rehabilitation, Mexico city. METHODS: 23 motor subacute and chronic incomplete SCI American Spinal Cord Injury Association Impairment Scale (AIS) D subjects were measured...
February 28, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28243195/part-2-adaptation-of-gait-kinematics-in-unilateral-cerebral-palsy-demonstrates-preserved-independent-neural-control-of-each-limb
#19
Thomas C Bulea, Christopher J Stanley, Diane L Damiano
Motor adaptation, or alteration of neural control in response to a perturbation, is a potential mechanism to facilitate motor learning for rehabilitation. Central nervous system deficits are known to affect locomotor adaptation; yet we demonstrated that similar to adults following stroke, children with unilateral brain injuries can adapt step length in response to unilateral leg weighting. Here, we extend our analysis to explore kinematic strategies underlying step length adaptation and utilize dynamical systems approaches to elucidate how neural control may differ in those with hemiplegic CP across legs and compared to typically developing controls...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28241769/instrumented-gait-analysis-a-measure-of-gait-improvement-by-a-wheeled-walker-in-hospitalized-geriatric-patients
#20
Samuel Schülein, Jens Barth, Alexander Rampp, Roland Rupprecht, Björn M Eskofier, Jürgen Winkler, Karl-Günter Gaßmann, Jochen Klucken
BACKGROUND: In an increasing aging society, reduced mobility is one of the most important factors limiting activities of daily living and overall quality of life. The ability to walk independently contributes to the mobility, but is increasingly restricted by numerous diseases that impair gait and balance. The aim of this cross-sectional observation study was to examine whether spatio-temporal gait parameters derived from mobile instrumented gait analysis can be used to measure the gait stabilizing effects of a wheeled walker (WW) and whether these gait parameters may serve as surrogate marker in hospitalized patients with multifactorial gait and balance impairment...
February 27, 2017: Journal of Neuroengineering and Rehabilitation
keyword
keyword
109261
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"