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https://www.readbyqxmd.com/read/28339828/single-session-of-functional-electrical-stimulation-assisted-walking-produces-corticomotor-symmetry-changes-related-to-changes-in-poststroke-walking-mechanics
#1
Jacqueline A Palmer, HaoYuan Hsiao, Tamara Wright, Stuart A Binder-Macleod
Background: Recent research demonstrated that symmetry of corticomotor drive to paretic and nonparetic plantarflexor muscles are related to the biomechanical ankle moment strategy that individuals with chronic stroke used to achieve their greatest walking speeds. Rehabilitation strategies that promote corticomotor balance could potentially improve post-stroke walking mechanics and enhance functional ambulation. Objective: To 1) test the effectiveness of a single session of gait training using functional electrical stimulation (FES) to improve plantarflexor corticomotor symmetry and plantarflexion ankle moment symmetry and 2) determine if changes in corticomotor symmetry relate to changes in ankle moment symmetry within the session...
February 23, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28318816/use-of-electromyography-to-optimize-lokomat-%C3%A2-settings-for-subject-specific-gait-rehabilitation-in-post-stroke-hemiparetic-patients-a-proof-of-concept-study
#2
Yosra Cherni, Mickael Begon, Hicham Chababe, Florent Moissenet
OBJECTIVES: While generic protocols exist for gait rehabilitation using robotic orthotics such as the Lokomat(®), several settings - guidance, body-weight support (BWS) and velocity - may be adjusted to individualize patient training. However, no systematic approach has yet emerged. Our objective was to assess the feasibility and effects of a systematic approach based on electromyography to determine subject-specific settings with application to the strengthening of the gluteus maximus muscle in post-stroke hemiparetic patients...
March 16, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314651/gait-and-balance-training-using-virtual-reality-is-more-effective-for-improving-gait-and-balance-ability-after-stroke-than-conventional-training-without-virtual-reality-synopsis
#3
https://www.readbyqxmd.com/read/28314650/gait-and-balance-training-using-virtual-reality-is-more-effective-for-improving-gait-and-balance-ability-after-stroke-than-conventional-training-without-virtual-reality-commentary
#4
https://www.readbyqxmd.com/read/28291737/advantages-of-eeg-phase-patterns-for-the-detection-of-gait-intention-in-healthy-and-stroke-subjects
#5
Andreea Ioana Sburlea, Luis Montesano, Javier Minguez
OBJECTIVE: One use of EEG-based brain-computer interfaces (BCIs) in rehabilitation is the detection of movement intention. In this paper we investigate for the first time the instantaneous phase of movement related cortical potential (MRCP) and its application to the detection of gait intention. APPROACH: We demonstrate the utility of MRCP phase in two independent datasets, in which 10 healthy subjects and 9 chronic stroke patients executed a self-initiated gait task in three sessions...
March 14, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28288334/trunk-biomechanics-during-hemiplegic-gait-after-stroke-a-systematic-review
#6
REVIEW
Tamaya Van Criekinge, Wim Saeys, Ann Hallemans, Silke Velghe, Pieter-Jan Viskens, Luc Vereeck, Willem De Hertogh, Steven Truijen
Stroke commonly results in trunk impairments that are associated with decreased trunk coordination and limited trunk muscle strength. These impairments often result in biomechanical changes during walking. Additionally, the so-called pelvic step might be influenced by these impairments. Therefore, the aim of this review was twofold. First, to gain more insight into trunk biomechanics during walking in stroke patients compared to healthy individuals. Second, to investigate the influence of walking speed on trunk biomechanics...
March 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28287978/on-the-adaptation-of-pelvic-motion-by-applying-3-dimensional-guidance-forces-using-tpad
#7
Jiyeon Kang, Vineet Vashista, Sunil Agrawal
Pelvic movement is important to human locomotion as the center of mass is located near the center of pelvis. Lateral pelvic motion plays a crucial role to shift the center of mass on the stance leg while swinging the other leg and keeping the body balanced. In addition, vertical pelvic movement helps to reduce metabolic energy expenditure by exchanging potential and kinetic energy during the gait cycle. However, patient groups with cerebral palsy or stroke have excessive pelvic motion that leads to high energy expenditure...
March 8, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
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/28284834/the-effectiveness-of-active-cycling-in-subacute-stroke-rehabilitation-a-randomized-controlled-trial
#9
Christel Vanroy, Hilde Feys, Anke Swinnen, Yves Vanlandewijck, Steven Truijen, Dirk Vissers, Marc Michielsen, Kristien Wouters, Patrick Cras
OBJECTIVE: To examine the effects of 3-month aerobic training (AT) followed by coaching on aerobic capacity, strength and gait speed after subacute stroke. DESIGN: Randomized controlled trial SETTING: Inpatient rehabilitation center PARTICIPANTS: Patients (N=59; mean age= 65.4±10.3; 21 women (36%); Barthel Index≤50= 64%) with first stroke and able to cycle at 50 revolutions/minute enrolled in the study 3-10 weeks after stroke onset. INTERVENTIONS: Patients were randomly allocated to a 3-month cycling group (ACG, n=33) and education or to a control group (CG, n=26)...
March 8, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28284572/an-articulated-ankle-foot-orthosis-with-adjustable-plantarflexion-resistance-dorsiflexion-resistance-and-alignment-a-pilot-study-on-mechanical-properties-and-effects-on-stroke-hemiparetic-gait
#10
Toshiki Kobayashi, Michael S Orendurff, Grace Hunt, Lucas S Lincoln, Fan Gao, Nicholas LeCursi, K Bo Foreman
Mechanical properties of an articulated ankle-foot orthosis (AFO) are closely related to gait performance in individuals post-stroke. This paper presents a pilot study on the mechanical properties of a novel articulated AFO with adjustable plantarflexion resistance, dorsiflexion resistance and alignment, and its effect on ankle and knee joint kinematics and kinetics in an individual post-stroke during gait. The mechanical properties of the AFO were quantified. Gait analysis was performed using a 3D motion capture system with a split-belt instrumented treadmill under 12 different settings of the mechanical properties of the AFO [i...
March 8, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28272726/-measurement-of-the-outcomes-in-acquired-brain-injury-in-a-neurorehabilitation-unit-a-long-term-study
#11
V Cruz-Guisado, P Diaz-Borrego, B Romero-Romero, M Rodriguez-Pinero Duran
INTRODUCTION: Following sudden brain damage, there is a loss of capabilities that affects the person's autonomy. Recovery from the physical, psychic and cognitive sequelae requires the application of multiple therapies, the outcomes of which need to be measured objectively. Our aim is to analyse the application of standardised instruments in determining the therapeutic outcomes in acquired brain injury. PATIENTS AND METHODS: We conducted a retrospective descriptive observational study lasting 13 months...
March 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28271220/constraints-on-perception-of-information-from-obstacles-during-foot-clearance-in-people-with-chronic-stroke
#12
Mohsen Shafizadeh, Jonathan Wheat, Keith Davids, Noureddin Nakhostin Ansari, Ali Ali, Samira Garmabi
The aim of this study was to examine effects of different types of task constraints on coupling of perception and action in people with chronic stroke when crossing obstacles during a walking task. Ten participants with hemiplegic chronic stroke volunteered to walk over a static obstacle under two distinct task constraints: simple and dual tasks. Under simple task constraints, without specific instructions, participants walked at their preferred speed and crossed over an obstacle. Under dual task constraints, the same individuals were required to subtract numbers whilst walking...
March 7, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28271039/deep-multi-scale-location-aware-3d-convolutional-neural-networks-for-automated-detection-of-lacunes-of-presumed-vascular-origin
#13
Mohsen Ghafoorian, Nico Karssemeijer, Tom Heskes, Mayra Bergkamp, Joost Wissink, Jiri Obels, Karlijn Keizer, Frank-Erik de Leeuw, Bram van Ginneken, Elena Marchiori, Bram Platel
Lacunes of presumed vascular origin (lacunes) are associated with an increased risk of stroke, gait impairment, and dementia and are a primary imaging feature of the small vessel disease. Quantification of lacunes may be of great importance to elucidate the mechanisms behind neuro-degenerative disorders and is recommended as part of study standards for small vessel disease research. However, due to the different appearance of lacunes in various brain regions and the existence of other similar-looking structures, such as perivascular spaces, manual annotation is a difficult, elaborative and subjective task, which can potentially be greatly improved by reliable and consistent computer-aided detection (CAD) routines...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28269656/automated-classification-of-pathological-gait-after-stroke-using-ubiquitous-sensing-technology
#14
Elham Dolatabadi, Babak Taati, Alex Mihailidis
This study uses machine learning methods to distinguish between healthy and pathological gait. Examples of multi-dimensional pathological and normal gait sequences were collected from post-stroke and healthy individuals in a real clinical setting and with two Kinect sensors. The trajectories of rotational angle and global velocity of selected body joints (hips, spine, shoulders, neck, knees and ankles) over time formed the gait sequences. The combination of k nearest neighbor (kNN) and dynamic time warping (DTW) was used for classification...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269460/monitoring-of-paces-and-gaits-using-binary-pir-sensors-with-rehabilitation-treadmill
#15
Jiang Lu, Ting Zhang, Qingquan Sun, Sanobar Kadiwal, Ishaq Unwala, Fei Hu
Recently, rehabilitation treadmills are designed for helping injured persons such as stroke patients and injury athletes in the process of physical therapy. By monitoring the changes of paces and gaits, one can estimate the progress of rehabilitation. At present, most devices that can estimate paces and gaits are wearable and/or expensive. This paper presents an inexpensive, non-intrusive wireless binary sensor system for pace estimation and lower-extreme gait recognition with low data throughput and high energy efficiency...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268771/knee-orthosis-with-variable-stiffness-and-damping-that-simulates-hemiparetic-gait
#16
Christina-Anne Lahiff, Tyagi Ramakrishnan, Seok Hun Kim, Kyle Reed
Individuals with unilateral stroke have neuromuscular weakness or paralysis on one side of the body caused by some muscles disengaging and others overexciting. Hyperextension of the knee joint and complete lack of plantar flexion of the ankle joint are common symptoms of stroke. This paper focuses on the creation and implementation of a small, lightweight, and adjustable orthotic device to be positioned around the knee of an able-bodied person to simulate hemiparetic gait. Force and range of motion data from able-bodied subjects fitted with the orthosis, inducing hemiparetic gait, was collected using the Computer Assisted Rehabilitation ENvironment (CAREN) system...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268722/wavelet-pca-for-automatic-identification-of-walking-with-and-without-an-exoskeleton-on-a-treadmill-using-pressure-and-accelerometer-sensors
#17
Ganesh R Naik, Gita Pendharkar, Hung T Nguyen
Nowadays portable devices with more number of sensors are used for gait assessment and monitoring for elderly and disabled. However, the problem with using multiple sensors is that if they are placed on the same platform or base, there could be cross talk between them, which could change the signal amplitude or add noise to the signal. Hence, this study uses wavelet PCA as a signal processing technique to separate the original sensor signal from the signal obtained from the sensors through the integrated unit to compare the two types of walking (with and without an exoskeleton)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268625/detecting-voluntary-gait-intention-of-chronic-stroke-patients-towards-top-down-gait-rehabilitation-using-eeg
#18
Junhyuk Choi, Hyolim Kang, Sang Hun Chung, Yeonghun Kim, Ung Hee Lee, Jong Min Lee, Seung-Jong Kim, Min Ho Chun, Hyungmin Kim
One of the recent trends in gait rehabilitation is to incorporate bio-signals, such as electromyography (EMG) or electroencephalography (EEG), for facilitating neuroplasticity, i.e. top-down approach. In this study, we investigated decoding stroke patients' gait intention through a wireless EEG system. To overcome patient-specific EEG patterns due to impaired cerebral cortices, common spatial patterns (CSP) was employed. We demonstrated that CSP filter can be used to maximize the EEG signal variance-ratio of gait and standing conditions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268622/unscented-kalman-filter-for-neural-decoding-of-human-treadmill-walking-from-non-invasive-electroencephalography
#19
Trieu Phat Luu, Yongtian He, Sho Nakagame, Jeffrey Gorges, Kevin Nathan, Jose L Contreras-Vidal
The feasibility of decoding lower limb kinematics in human treadmill walking from noninvasive electroencephalography (EEG) has been demonstrated with linear Wiener filter. However, nonlinear relationship between neural activities and limb movements may challenge the linear decoders in real-time brain computer interface (BCI) applications. In this study, we propose a nonlinear neural decoder using an Unscented Kalman Filter (UKF) to infer lower limb joint angles from noninvasive scalp EEG signals during human treadmill walking...
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
#20
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
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