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Journal of Neuroengineering and Rehabilitation

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https://www.readbyqxmd.com/read/28915834/skeletal-muscle-mechanics-questions-problems-and-possible-solutions
#1
REVIEW
Walter Herzog
Skeletal muscle mechanics have been studied ever since people have shown an interest in human movement. However, our understanding of muscle contraction and muscle mechanical properties has changed fundamentally with the discovery of the sliding filament theory in 1954 and associated cross-bridge theory in 1957. Nevertheless, experimental evidence suggests that our knowledge of the mechanisms of contraction is far from complete, and muscle properties and muscle function in human movement remain largely unknown...
September 16, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28915821/assessment-of-the-underlying-systems-involved-in-standing-balance-the-additional-value-of-electromyography-in-system-identification-and-parameter-estimation
#2
J H Pasma, J van Kordelaar, D de Kam, V Weerdesteyn, A C Schouten, H van der Kooij
BACKGROUND: Closed loop system identification (CLSIT) is a method to disentangle the contribution of underlying systems in standing balance. We investigated whether taking into account lower leg muscle activation in CLSIT could improve the reliability and accuracy of estimated parameters identifying the underlying systems. METHODS: Standing balance behaviour of 20 healthy young participants was measured using continuous rotations of the support surface (SS). The dynamic balance behaviour obtained with CLSIT was expressed by sensitivity functions of the ankle torque, body sway and muscle activation of the lower legs to the SS rotation...
September 15, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28903772/transcranial-direct-current-stimulation-tdcs-for-improving-capacity-in-activities-and-arm-function-after-stroke-a-network-meta-analysis-of-randomised-controlled-trials
#3
REVIEW
Bernhard Elsner, Gert Kwakkel, Joachim Kugler, Jan Mehrholz
BACKGROUND: Transcranial Direct Current Stimulation (tDCS) is an emerging approach for improving capacity in activities of daily living (ADL) and upper limb function after stroke. However, it remains unclear what type of tDCS stimulation is most effective. Our aim was to give an overview of the evidence network regarding the efficacy and safety of tDCS and to estimate the effectiveness of the different stimulation types. METHODS: We performed a systematic review of randomised trials using network meta-analysis (NMA), searching the following databases until 5 July 2016: Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, CINAHL, AMED, Web of Science, and four other databases...
September 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28903771/novel-spatiotemporal-analysis-of-gait-changes-in-body-weight-supported-treadmill-trained-rats-following-cervical-spinal-cord-injury
#4
Nathan D Neckel
BACKGROUND: Common gait measures such as stride length, cycle time, and step height are not independent variables, but different aspects of the same multidimensional step. This complicates comparisons between experimental groups. Here we present a novel multidimensional gait analysis method and use this method to assess the ability of body weight supported treadmill training (BWSTT) to improve rodent stepping after spinal cord injury (SCI). METHODS: In lieu of reducing a step to a collection of gait measures and comparing the means of several of these, we developed a multidimensional analysis technique that compares the step as a whole...
September 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28899433/wearable-sensors-to-predict-improvement-following-an-exercise-intervention-in-patients-with-knee-osteoarthritis
#5
Dylan Kobsar, Sean T Osis, Jeffrey E Boyd, Blayne A Hettinga, Reed Ferber
BACKGROUND: Muscle strengthening exercises consistently demonstrate improvements in the pain and function of adults with knee osteoarthritis, but individual response rates can vary greatly. Identifying individuals who are more likely to respond is important in developing more efficient rehabilitation programs for knee osteoarthritis. Therefore, the purpose of this study was to determine if pre-intervention multi-sensor accelerometer data (e.g., back, thigh, shank, foot accelerometers) and patient reported outcome measures (e...
September 12, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28893295/a-brain-computer-interface-driven-by-imagining-different-force-loads-on-a-single-hand-an-online-feasibility-study
#6
Kun Wang, Zhongpeng Wang, Yi Guo, Feng He, Hongzhi Qi, Minpeng Xu, Dong Ming
BACKGROUND: Motor imagery (MI) induced EEG patterns are widely used as control signals for brain-computer interfaces (BCIs). Kinetic and kinematic factors have been proved to be able to change EEG patterns during motor execution and motor imagery. However, to our knowledge, there is still no literature reporting an effective online MI-BCI using kinetic factor regulated EEG oscillations. This study proposed a novel MI-BCI paradigm in which users can online output multiple commands by imagining clenching their right hand with different force loads...
September 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28893292/reorganization-of-finger-coordination-patterns-through-motor-exploration-in-individuals-after-stroke
#7
Rajiv Ranganathan
BACKGROUND: Impairment of hand and finger function after stroke is common and affects the ability to perform activities of daily living. Even though many of these coordination deficits such as finger individuation have been well characterized, it is critical to understand how stroke survivors learn to explore and reorganize their finger coordination patterns for optimizing rehabilitation. In this study, I examine the use of a body-machine interface to assess how participants explore their movement repertoire, and how this changes with continued practice...
September 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28893285/estimates-of-individual-muscle-power-production-in-normal-adult-walking
#8
Ross A Bogey, Lee A Barnes
BACKGROUND: The purpose of this study was to determine the contribution of individual hip muscles to the net hip power in normal adult self-selected speed walking. A further goal was to examine each muscle's role in propulsion or support of the body during that task. METHODS: An EMG-to-force processing (EFP) model was developed which scaled muscle-tendon unit (MTU) force output to gait EMG. Active muscle power was defined as the product of MTU forces (derived from EFP) and that muscle's contraction velocity...
September 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28893279/biomechanics-and-neural-control-of-movement-20%C3%A2-years-later-what-have-we-learned-and-what-has-changed
#9
REVIEW
Andrew D Nordin, William Z Rymer, Andrew A Biewener, Andrew B Schwartz, Daofen Chen, Fay B Horak
We summarize content from the opening thematic session of the 20th anniversary meeting for Biomechanics and Neural Control of Movement (BANCOM). Scientific discoveries from the past 20 years of research are covered, highlighting the impacts of rapid technological, computational, and financial growth on motor control research. We discuss spinal-level communication mechanisms, relationships between muscle structure and function, and direct cortical movement representations that can be decoded in the control of neuroprostheses...
September 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28886720/development-of-an-electrooculogram-based-eye-computer-interface-for-communication-of-individuals-with-amyotrophic-lateral-sclerosis
#10
Won-Du Chang, Ho-Seung Cha, Do Yeon Kim, Seung Hyun Kim, Chang-Hwan Im
BACKGROUND: Electrooculogram (EOG) can be used to continuously track eye movements and can thus be considered as an alternative to conventional camera-based eye trackers. Although many EOG-based eye tracking systems have been studied with the ultimate goal of providing a new way of communication for individuals with amyotrophic lateral sclerosis (ALS), most of them were tested with healthy people only. In this paper, we investigated the feasibility of EOG-based eye-writing as a new mode of communication for individuals with ALS...
September 8, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28877750/mit-skywalker-considerations-on-the-design-of-a-body-weight-support-system
#11
Rogério Sales Gonçalves, Hermano Igo Krebs
BACKGROUND: To provide body weight support during walking and balance training, one can employ two distinct embodiments: support through a harness hanging from an overhead system or support through a saddle/seat type. This paper presents a comparison of these two approaches. Ultimately, this comparison determined our selection of the body weight support system employed in the MIT-Skywalker, a robotic device developed for the rehabilitation/habilitation of gait and balance after a neurological injury...
September 6, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28854939/weight-supported-training-of-the-upper-extremity-in-children-with-cerebral-palsy-a-motor-learning-study
#12
Jeffrey W Keller, Hubertus J A van Hedel
BACKGROUND: Novel neurorehabilitation technologies build upon treatment principles derived from motor learning studies. However, few studies have investigated motor learning with assistive devices in children and adolescents with Cerebral Palsy (CP). The aim of this study was to investigate whether children with CP who trained with weight support in a playful, virtual environment would improve upper extremity task performance (i.e. skill acquisition), transfer, and retention, three aspects that indicate whether motor learning might have occurred or not...
August 30, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28851391/surface-emg-signals-in-very-late-stage-of-duchenne-muscular-dystrophy-a-case-study
#13
Joan Lobo-Prat, Mariska M H P Janssen, Bart F J M Koopman, Arno H A Stienen, Imelda J M de Groot
BACKGROUND: Robotic arm supports aim at improving the quality of life for adults with Duchenne muscular dystrophy (DMD) by augmenting their residual functional abilities. A critical component of robotic arm supports is the control interface, as is it responsible for the human-machine interaction. Our previous studies showed the feasibility of using surface electromyography (sEMG) as a control interface to operate robotic arm supports in adults with DMD (22-24 years-old). However, in the biomedical engineering community there is an often raised skepticism on whether adults with DMD at the last stage of their disease have sEMG signals that can be measured and used for control...
August 29, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28841920/ipsilateral-eeg-mu-rhythm-reflects-the-excitability-of-uncrossed-pathways-projecting-to-shoulder-muscles
#14
Keita Hasegawa, Shoko Kasuga, Kenichi Takasaki, Katsuhiro Mizuno, Meigen Liu, Junichi Ushiba
BACKGROUND: Motor planning, imagery or execution is associated with event-related desynchronization (ERD) of mu rhythm oscillations (8-13 Hz) recordable over sensorimotor areas using electroencephalography (EEG). It was shown that motor imagery involving distal muscles, e.g. finger movements, results in contralateral ERD correlating with increased excitability of the contralateral corticospinal tract (c-CST). Following the rationale that purposefully increasing c-CST excitability might facilitate motor recovery after stroke, ERD recently became an attractive target for brain-computer interface (BCI)-based neurorehabilitation training...
August 25, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28810928/gait-characteristics-and-their-discriminative-power-in-geriatric-patients-with-and-without-cognitive-impairment
#15
Lisette H J C Kikkert, Nicolas Vuillerme, Jos P van Campen, Bregje A Appels, Tibor Hortobágyi, Claudine J Lamoth
BACKGROUND: A detailed gait analysis (e.g., measures related to speed, self-affinity, stability, and variability) can help to unravel the underlying causes of gait dysfunction, and identify cognitive impairment. However, because geriatric patients present with multiple conditions that also affect gait, results from healthy old adults cannot easily be extrapolated to geriatric patients. Hence, we (1) quantified gait outcomes based on dynamical systems theory, and (2) determined their discriminative power in three groups: healthy old adults, geriatric patients with- and geriatric patients without cognitive impairment...
August 15, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28807038/nlr-mlp-svm-and-lda-a-comparative-analysis-on-emg-data-from-people-with-trans-radial-amputation
#16
Alberto Dellacasa Bellingegni, Emanuele Gruppioni, Giorgio Colazzo, Angelo Davalli, Rinaldo Sacchetti, Eugenio Guglielmelli, Loredana Zollo
BACKGROUND: Currently, the typically adopted hand prosthesis surface electromyography (sEMG) control strategies do not provide the users with a natural control feeling and do not exploit all the potential of commercially available multi-fingered hand prostheses. Pattern recognition and machine learning techniques applied to sEMG can be effective for a natural control based on the residual muscles contraction of amputated people corresponding to phantom limb movements. As the researches has reached an advanced grade accuracy, these algorithms have been proved and the embedding is necessary for the realization of prosthetic devices...
August 14, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28807025/changes-in-tibialis-anterior-architecture-affect-the-amplitude-of-surface-electromyograms
#17
Taian M Vieira, Maria Cristina Bisi, Rita Stagni, Alberto Botter
BACKGROUND: Variations in the amplitude of surface electromyograms (EMGs) are typically considered to advance inferences on the timing and degree of muscle activation in different circumstances. Surface EMGs are however affected by factors other than the muscle neural drive. In this study, we use electrical stimulation to investigate whether architectural changes in tibialis anterior (TA), a key muscle for balance and gait, affect the amplitude of surface EMGs. METHODS: Current pulses (500 μs; 2 pps) were applied to the fibular nerve of ten participants, with the ankle at neutral, full dorsi and full plantar flexion positions...
August 14, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28806995/robot-supported-assessment-of-balance-in-standing-and-walking
#18
REVIEW
Camila Shirota, Edwin van Asseldonk, Zlatko Matjačić, Heike Vallery, Pierre Barralon, Serena Maggioni, Jaap H Buurke, Jan F Veneman
Clinically useful and efficient assessment of balance during standing and walking is especially challenging in patients with neurological disorders. However, rehabilitation robots could facilitate assessment procedures and improve their clinical value. We present a short overview of balance assessment in clinical practice and in posturography. Based on this overview, we evaluate the potential use of robotic tools for such assessment. The novelty and assumed main benefits of using robots for assessment are their ability to assess 'severely affected' patients by providing assistance-as-needed, as well as to provide consistent perturbations during standing and walking while measuring the patient's reactions...
August 14, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28806980/factors-influencing-outcomes-after-medial-hamstring-lengthening-with-semitendinosus-transfer-in-patients-with-cerebral-palsy
#19
Ki Hyuk Sung, Jaebong Lee, Chin Youb Chung, Kyoung Min Lee, Byung Chae Cho, Seung Jun Moon, Jaeyoung Kim, Moon Seok Park
BACKGROUND: Although several studies have investigated the outcomes after distal hamstring lengthening (DHL), no study has undertaken an approach that included all or most of the important factors that could influence the results. This study was performed to evaluate the outcomes after DHL and analyze the factors that influence the improvement and serial change in knee motion after surgery in patients with cerebral palsy (CP), using a linear mixed model (LMM). METHODS: The study included 314 ambulatory CP patients (594 limbs) with spsastic diplegia who were followed up after undergoing DHL as part of a single-event multilevel surgery and who underwent preoperative and postoperative 3-dimensional (3D) gait analyses...
August 14, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28800738/advances-in-closed-loop-deep-brain-stimulation-devices
#20
REVIEW
Mahboubeh Parastarfeizabadi, Abbas Z Kouzani
BACKGROUND: Millions of patients around the world are affected by neurological and psychiatric disorders. Deep brain stimulation (DBS) is a device-based therapy that could have fewer side-effects and higher efficiencies in drug-resistant patients compared to other therapeutic options such as pharmacological approaches. Thus far, several efforts have been made to incorporate a feedback loop into DBS devices to make them operate in a closed-loop manner. METHODS: This paper presents a comprehensive investigation into the existing research-based and commercial closed-loop DBS devices...
August 11, 2017: Journal of Neuroengineering and Rehabilitation
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