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https://www.readbyqxmd.com/read/29154694/gait-and-quiet-stance-performance-among-adolescents-after-concussion-symptom-resolution
#1
Justin Berkner, William P Meehan, Christina L Master, David R Howell
OBJECTIVE:   To prospectively examine adolescent athletes' gait and quiet-stance performance while concurrently completing a cognitive task acutely after concussion and after symptom resolution. SETTING:   Sport concussion clinic. DESIGN:   Participants diagnosed with a concussion completed a symptom inventory and single- and dual-task quiet-stance and gait evaluations within 21 days of injury and then again after symptom resolution...
November 20, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29148135/cadence-tracking-and-disturbance-rejection-in-functional-electrical-stimulation-cycling-for-paraplegic-subjects-a-case-study
#2
Lucas O da Fonseca, Antônio P L Bó, Juliana A Guimarães, Miguel E Gutierrez, Emerson Fachin-Martins
Functional electrical stimulation cycling has been proposed as an assistive technology with numerous health and fitness benefits for people with spinal cord injury, such as improvement in cardiovascular function, increase in muscular mass, and reduction of bone mass loss. However, some limitations, for example, lack of optimal control strategies that would delay fatigue, may still prevent this technology from achieving its full potential. In this work, we performed experiments on a person with complete spinal cord injury using a stationary tadpole trike when both cadence tracking and disturbance rejection were evaluated...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29141826/effects-of-cognitive-versus-motor-dual-task-on-spatiotemporal-gait-parameters-in-healthy-controls-and-multiple-sclerosis-patients-with-and-without-fall-history
#3
Razieh Mofateh, Reza Salehi, Hossein Negahban, Mohammad Mehravar, Shirin Tajali
BACKGROUND: The purpose of the current study was to compare the effects of cognitive or motor tasks on gait performance between healthy controls and multiple sclerosis (MS) patients with and without fall history. METHODS: The investigation included MS patients with fall history (n = 25) and without fall history (n = 25) and matched healthy controls (n = 25). Participants walked at their preferred speed on a motorized treadmill under three walking conditions in a randomized order: walking only, walking while performing a concurrent cognitive task (counting backward aloud by 3s), and walking while performing a concurrent motor task (carrying a tray with glasses)...
November 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29139570/distribution-of-segmental-foot-kinematics-in-patients-with-degenerative-joint-disease-of-the-ankle
#4
Karl Canseco, Karen M Kruger, Jessica M Fritz, Katherine A Konop, Sergey Tarima, Richard M Marks, Gerald F Harris
Degenerative joint disease (DJD) of the ankle is a debilitating chronic disease associated with severe pain and dysfunction resulting in antalgic gait alteration. Little information is available about segmental foot and ankle motion distribution during gait in ankle osteoarthritis. The aim of the current study was to dynamically characterize segmental foot and ankle kinematics of patients with severe ankle arthrosis requiring total ankle replacement. This was a prospective study involving 36 (19 M, 17 F) adult patients with a clinical diagnosis of ankle arthrosis ("DJD" group) and 36 (23 M, 13 F) healthy subjects ("Control" group)...
November 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29135633/manipulating-cadence-for-gait-re-training-in-runners
#5
Christine Martin Morgan, Heather K Vincent
No abstract text is available yet for this article.
November 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29134923/coefficient-of-friction-walking-speed-and-cadence-on-slippery-and-dry-surfaces-shoes-with-different-groove-depths
#6
Mansour Ziaei, Hamid Reza Mokhtarinia, Farhad Tabatabai Ghomshe, Maryam Maghsoudipour
OBJECTIVE: The aim of the present study was to determine the coefficient of friction (COF), walking speed (WS), and cadence while walking on slippery and dry surfaces using shoes with different sole groove depths to predict how much it is likely to fall. BACKGROUND: Design of shoe sole groove is crucial to prevent slipping during walking. METHODS: 22 healthy young men (mean age: 24.5 and body mass index: 22.5) volunteered for this semi-experimental study...
November 14, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/29128629/influence-of-emotional-stimuli-on-lower-limb-cutaneous-reflexes-during-human-gait
#7
Martin Zaback, Brian C Horslen, Taylor W Cleworth, Laurel Collings, Cécile Langlet, J Timothy Inglis, Mark G Carpenter
Previous research has shown that cutaneous reflexes are modulated when walking with a threat to stability. It is unclear if this reflex modulation is purely related to the context of the imposed threat or if emotional changes associated with the threat exert an independent influence on reflex excitability. This study investigated the influence of emotional stimuli on lower limb cutaneous reflexes during treadmill walking. Twenty-eight healthy young adults walked at a self-selected pace while viewing pictures that manipulated emotional arousal and valence (confirmed with electrodermal and self-report measures)...
November 8, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29114508/the-effects-of-ankle-weight-loading-on-the-walking-factors-of-adults-without-symptoms
#8
Jea-Woong Hwang, Su-Kyoung Lee, Jin-Seong Park, Su-Hong Ahn, Kwnag-Jun Lee, Sung-Jae Lee
The purpose of this study was to evaluate the components of walking adults who have no symptoms by integrating the temporal and spatial walking variables obtained from the GAITRite system. The following describes previous debates on weight-loaded walking training. The conclusion was as follows. First, there was a significant difference in walking distance between the 0% group and 1% group and between the 1% group and 2% group (P<0.05). Sencond, there was a significant difference in walking velocity between the 0% group and 1% group and between the 0% group and 2% group (P<0...
August 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29114238/long-term-monitoring-gait-analysis-using-a-wearable-device-in-daily-lives-of-patients-with-parkinson-s-disease-the-efficacy-of-selegiline-hydrochloride-for-gait-disturbance
#9
Mutsumi Iijima, Hiroshi Mitoma, Shinichiro Uchiyama, Kazuo Kitagawa
Objective: The aim of this study was to assess quantitatively the gait disorders in the daily lives of patients with Parkinson's disease (PD) using with a newly developed portable gait rhythmogram (PGR), which has a trunk-mounted acceleration sensor and automatic gait-detection algorithm. Methods: Using the PGR, we recorded the daily walking profiles of 14 PD patients before and after the addition or increase in dose of an MAO-B inhibitor (selegiline, average dose: 4...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29106758/transcriptomic-analysis-of-synovial-extracellular-rna-following-knee-trauma-a-pilot-study
#10
Anthony J Griswold, Jose Perez, Karen Nuytemans, Thomas Strong, Liyong Wang, Danica D Vance, Hayley Ennis, Marvin K Smith, Thomas M Best, Jeffery M Vance, Margaret A Pericak-Vance, Lee D Kaplan
Traumatic knee injuries often result in damage to articular cartilage and other joint structures. Such trauma is a strong risk factor for the future development and progression of osteoarthritis (OA). The molecular mechanisms and signaling pathways modulating response to knee joint trauma remain unclear. Moreover, investigations of biomarkers influencing responses have been targeted rather than broad, unbiased discovery studies. Herein we characterize the complete complement of extracellular RNA (exRNA) in the synovial fluid of 14 subjects following knee injury...
November 6, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29104421/a-prospectus-on-kinetic-heliophysics
#11
Gregory G Howes
Under the low density and high temperature conditions typical of heliospheric plasmas, the macroscopic evolution of the heliosphere is strongly affected by the kinetic plasma physics governing fundamental microphysical mechanisms. Kinetic turbulence, collisionless magnetic reconnection, particle acceleration, and kinetic instabilities are four poorly understood, grand-challenge problems that lie at the new frontier of kinetic heliophysics. The increasing availability of high cadence and high phase-space resolution measurements of particle velocity distributions by current and upcoming spacecraft missions and of massively parallel nonlinear kinetic simulations of weakly collisional heliospheric plasmas provides the opportunity to transform our understanding of these kinetic mechanisms through the full utilization of the information contained in the particle velocity distributions...
May 2017: Physics of Plasmas
https://www.readbyqxmd.com/read/29103048/treadmill-training-with-cues-and-feedback-improves-gait-in-people-with-more-advanced-parkinson-s-disease
#12
Valeria Studer, Roberto Maestri, Ilaria Clerici, Letizia Spina, Ilaria Zivi, Davide Ferrazzoli, Giuseppe Frazzitta
BACKGROUND: Gait disturbances in Parkinson's disease (PD) are highly disabling and poorly responsive to drugs, especially in advanced stages. While the efficacy of a treadmill training based on external feedback and cues (treadmill-plus) on gait disturbances in early PD stages is demonstrated, no definitive evidence exists about advanced stages. OBJECTIVE: We aimed to evaluate the feasibility and the effects of a treadmill-plus training on gait disturbances in advanced PD...
2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/29099665/analysis-of-muscular-activity-and-dynamic-response-of-the-lower-limb-adding-vibration-to-cycling
#13
Marcela Munera, William Bertucci, Sebastien Duc, Xavier Chiementin
Vibration in cycling has been proved to have undesirable effects over health, comfort and performance of the rider. In this study, 15 participants performed eight 6-min sub-maximal pedalling exercises at a constant power output (150W) and pedalling cadence (80 RPM) being exposed to vibration at different frequencies (20, 30, 40, 50, 60, 70 Hz) or without vibration. Oxygen uptake (VO2), heart rate (HR), surface EMG activity of seven lower limb muscles (GMax, RF, BF, VM, GAS, SOL and TA) and 3-dimentional accelerations at ankle, knee and hip were measured during the exercises...
November 3, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29074289/gait-biomechanics-of-skipping-are-substantially-different-than-those-of-running
#14
Jessica McDonnell, John D Willson, Kevin A Zwetsloot, Joseph Houmard, Paul DeVita
The inherit injury risk associated with high-impact exercises calls for alternative ways to achieve the benefits of aerobic exercise while minimizing excessive stresses to body tissues. Skipping presents such an alternative, incorporating double support, flight, and single support phases. We used ground reaction forces (GRFs), lower extremity joint torques and powers to compare skipping and running in 20 healthy adults. The two consecutive skipping steps on each limb differed significantly from each other, and from running...
October 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29065485/a-wearable-magneto-inertial-system-for-gait-analysis-h-gait-validation-on-normal-weight-and-overweight-obese-young-healthy-adults
#15
Valentina Agostini, Laura Gastaldi, Valeria Rosso, Marco Knaflitz, Shigeru Tadano
Background: Wearable magneto-inertial sensors are being increasingly used to obtain human motion measurements out of the lab, although their performance in applications requiring high accuracy, such as gait analysis, are still a subject of debate. The aim of this work was to validate a gait analysis system (H-Gait) based on magneto-inertial sensors, both in normal weight (NW) and overweight/obese (OW) subjects. The validation is performed against a reference multichannel recording system (STEP32), providing direct measurements of gait timings (through foot-switches) and joint angles in the sagittal plane (through electrogoniometers)...
October 21, 2017: Sensors
https://www.readbyqxmd.com/read/29062295/familiar-tonal-context-improves-accuracy-of-pitch-interval-perception
#16
Jackson E Graves, Andrew J Oxenham
A fundamental feature of everyday music perception is sensitivity to familiar tonal structures such as musical keys. Many studies have suggested that a tonal context can enhance the perception and representation of pitch. Most of these studies have measured response time, which may reflect expectancy as opposed to perceptual accuracy. We instead used a performance-based measure, comparing participants' ability to discriminate between a "small, in-tune" interval and a "large, mistuned" interval in conditions that involved familiar tonal relations (diatonic, or major, scale notes), unfamiliar tonal relations (whole-tone or mistuned-diatonic scale notes), repetition of a single pitch, or no tonal context...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29060772/contribution-of-body-movements-on-the-heart-rate-variability-during-high-intensity-running
#17
Iman Alikhani, Kai Noponen, Tapio Seppanen
We studied the association between the heart rate variability (HRV) and the subject's movement during high intensity running. HRV is affected by movement, and this phenomena is known as cardiolocomotor coupling (CLC). Characterization of movement related components on the HRV spectrogram is a principal step toward meaningful interpretation of autonomic nervous system (ANS) activity. According to the literature, the aliases of the first and second harmonics of the cadence frequency are the main contributors affecting HRV...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060719/development-and-assessment-of-a-novel-ankle-rehabilitation-system-for-stroke-survivors
#18
Beom-Chan Lee, Dae-Hee Kim, Younsun Son, Kap-Ho Seo, Sung Ho Park, Dongyual Yoo, Alberto Fung
Spasticity after stroke is a common occurrence and requires treatment with rehabilitative regimens (e.g., stretching exercise). Unfortunately, many challenges (e.g., cost, limited availability of physical therapists, limited access to clinical facilities, etc.) can restrict participation in these rehabilitation regimens. Assistive technologies using robotic systems have been developed to provide an alternative to assist with rehabilitative exercises. However, existing assistive technologies are rarely available in clinical settings due to technical limitations (e...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059831/real-time-gait-analysis-with-accelerometer-based-smart-shoes
#19
R Delgado-Gonzalo, J Hubbard, Ph Renevey, A Lemkaddem, Q Vellinga, D Ashby, J Willardson, M Bertschi
In this paper, we present the evaluation of a new smart shoe capable of performing gait analysis in real time. The system is exclusively based on accelerometers which minimizes the power consumption. The estimated parameters are activity class (rest/walk/run), step cadence, ground contact time, foot impact (zone, strength, and balance), forward distance, and speed. The different parameters have been validated with a customized database of 26 subjects on a treadmill and video data labeled manually. Key measures for running analysis such as the cadence is retrieved with a maximum error of 2%, and the ground contact time with an average error of 3...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29054746/the-influence-of-cadence-and-shoes-on-patellofemoral-joint-kinetics-in-runners-with-patellofemoral-pain
#20
Jason Bonacci, Michelle Hall, Aaron Fox, Natalie Saunders, Tristan Shipsides, Bill Vicenzino
OBJECTIVES: To determine the effect of a combination of a minimalist shoe and increased cadence on measures of patellofemoral joint loading during running in individuals with patellofemoral pain. DESIGN: Within-participant repeated measures with four conditions presented in random order: (1) control shoe at preferred cadence; (2) control shoe with +10% cadence; (3) minimalist shoe at preferred cadence; (4) minimalist shoe with +10% cadence. METHODS: Fifteen recreational runners with patellofemoral pain ran on an instrumented treadmill while three-dimensional motion capture data were acquired...
October 6, 2017: Journal of Science and Medicine in Sport
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