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IEEE Transactions on Neural Systems and Rehabilitation Engineering

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https://www.readbyqxmd.com/read/29752247/correction-to-mixed-modality-stimulation-to-evoke-two-modalities-simultaneously-in-one-channel-for-electrocutaneous-sensory-feedback
#1
Kyunghwan Choi, Pyungkang Kim, Kyung-Soo Kim, Soohyun Kim
In the above paper [1], the authors' photographs and biographies should have appeared as follows.
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752246/a-novel-stimulation-paradigm-to-limit-the-habituation-of-the-nociceptive-withdrawal-reflex
#2
Sabata Gervasio, Christian B Laursen, Ole K Andersen, Kristian Hennings, Erika G Spaich
In gait rehabilitation, combining gait therapy with functional electrical stimulation based on the nociceptive withdrawal reflex (NWR) improves walking velocity and gait symmetry of hemiparetic patients. However, habituation of the NWR can affect the efficacy of training. The current study aimed at identifying the stimulation parameters that would limit, in healthy participants, the habituation of the NWR. The NWR was elicited at every heel-off while the participants walked on a treadmill. Three stimulation paradigms were tested: deterministic paradigm (fixed parameters), stochastic pulse duration paradigm (varying the pulse duration of the stimuli), and stochastic frequency paradigm (varying the frequency of the stimuli)...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752245/modeling-and-characterization-of-capacitive-elements-with-tissue-as-dielectric-material-for-wireless-powering-of-neural-implants
#3
Reza Erfani, Fatemeh Marefat, Amir M Sodagar, Pedram Mohseni
This paper reports on the modeling and characterization of capacitive elements with tissue as the dielectric material, representing the core building block of a capacitive link for wireless power transfer to neural implants. Each capacitive element consists of two parallel plates that are aligned around the tissue layer and incorporate a grounded, guarded, capacitive pad to mitigate the adverse effect of stray capacitances and shield the plates from external interfering electric fields. The plates are also coated with a biocompatible, insulating, coating layer on the inner side of each plate in contact with the tissue...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752244/spatial-temporal-dynamics-of-the-sensorimotor-cortex-sustained-and-transient-activity
#4
E Salari, Z V Freudenburg, M J Vansteensel, N F Ramsey
How the sensorimotor cortex is organized with respect to controlling different features of movement is unclear. One unresolved question concerns the relation between the duration of an action and the duration of the associated neuronal activity change in the sensorimotor cortex. Using subdural electrocorticography electrodes, we investigated in five subjects, whether high frequency band (HFB; 75-135 Hz) power changes have a transient or sustained relation to speech duration, during pronunciation of the Dutch /i/ vowel with different durations...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752243/mechanical-stimulation-of-the-retina-therapeutic-feasibility-and-cellular-mechanism
#5
Corey M Rountree, Chen Meng, John B Troy, Laxman Saggere
Retinal prostheses that seek to restore vision by artificially stimulating retinal neurons with electrical current are an emerging treatment for photoreceptor degenerative diseases but face difficulties achieving naturalistic vision with high spatial resolution. Here, we report the unexpected discovery of a technique for mechanically stimulating retinal neurons with the potential to bypass the limitations of electrical stimulation. We found that pulsatile injections of standard Ames medium solution into explanted retinas of wild type rats under certain injection conditions (pulse-width > 50ms at 0...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752242/automated-fes-for-upper-limb-rehabilitation-following-stroke-and-spinal-cord-injury
#6
Edmund F Hodkin, Yuming Lei, Jonathan Humby, Isabel S Glover, Supriyo Choudhury, Hrishikesh Kumar, Monica A Perez, Helen Rodgers, Andrew Jackson
Neurorehabilitation aims to induce beneficial neural plasticity in order to restore function following injury to the nervous system. There is an increasing evidence that appropriately timed functional electrical stimulation (FES) can promote associative plasticity, but the dosage is critical for lasting functional benefits. Here, we present a novel approach to closed-loop control of muscle stimulation for the rehabilitation of reach-to-grasp movements following stroke and spinal cord injury (SCI). We developed a simple, low-cost device to deliver assistive stimulation contingent on users' self-initiated movements...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752241/upper-limb-prosthesis-control-for-high-level-amputees-via-myoelectric-recognition-of-leg-gestures
#7
Kenneth R Lyons, Sanjay S Joshi
Recognition of motion intent via surface electromyography (EMG) has become increasingly practical for prosthesis control, but lacking residual muscle sites remains a major obstacle to its use by high-level amputees. Currently, there are few approaches to upper limb prosthesis control for individuals with amputations proximal to the elbow, all of which suffer from one or more of three primary problems: invasiveness, the need for intensive training, and lacking functionality. Using surface EMG sensors placed on the lower leg and a natural mapping between degrees of freedom of the leg and the arm, we tested a noninvasive control approach by which high-level amputees could control prosthetic elbow, wrist, and hand movements with minimal training...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752240/evaluating-internal-model-strength-and-performance-of-myoelectric-prosthesis-control-strategies
#8
Ahmed W Shehata, Erik J Scheme, Jonathon W Sensinger
On-going developments in myoelectric prosthesis control have provided prosthesis users with an assortment of control strategies that vary in reliability and performance. Many studies have focused on improving performance by providing feedback to the user but have overlooked the effect of this feedback on internal model development, which is key to improve long-term performance. In this paper, the strength of internal models developed for two commonly used myoelectric control strategies: raw control with raw feedback (using a regression-based approach) and filtered control with filtered feedback (using a classifier-based approach), were evaluated using two psychometric measures: trial-by-trial adaptation and just-noticeable difference...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752239/development-of-an-ankle-foot-orthosis-that-provides-support-for-flaccid-paretic-plantarflexor-and-dorsiflexor-muscles
#9
Dymphy van der Wilk, Roy Reints, Klaas Postema, Tom Gort, Jaap Harlaar, Juha Markus Hijmans, Gijsbertus Jacob Verkerke
ADJUST, a novel ankle-foot orthosis (AFO) that we have developed, allows the ankle a normal range of motion (ROM) while providing support for flaccid ankle-muscle paresis. It consists of two leaf-spring hinges that independently control plantarflexion and dorsiflexion stiffness. To evaluate whether ADJUST meets the minimum mechanical requirements, we quantified its ankle ROM and stiffness. To evaluate whether it meets the minimum ankle kinematic and kinetic goals for normal gait, a patient with both plantarflexor and dorsiflexor paralysis used it, and his own AFO, to walk...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752238/robotic-spine-exoskeleton-rose-characterizing-the-3-d-stiffness-of-the-human-torso-in-the-treatment-of-spine-deformity
#10
Joon-Hyuk Park, Paul R Stegall, David P Roye, Sunil K Agrawal
Spine deformity is typically treated with a brace that fits around the torso and hips to correct the abnormal curve of the spine. While bracing has been shown to curtail progression of abnormal spine curves, current braces impose several limitations due to their rigid, static, and sensor-less designs: (1) forces and moments exerted by the brace cannot be measured or modulated and (2) the 3-D stiffness of the human torso has not been characterized-these may be important factors to be considered in bracing treatment...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752237/cross-comparison-of-motor-unit-potential-features-used-in-emg-signal-decomposition
#11
Mohsen Ghofrani Jahromi, Hossein Parsaei, Ali Zamani, Daniel W Stashuk
Feature extraction is an important step of resolving an electromyographic (EMG) signal into its component motor unit potential trains, commonly known as EMG decomposition. Until now, different features have been used to represent motor unit potentials (MUPs) and improve decomposition processing time and accuracy, but a major limitation is that no systematic comparison of these features exists. In an EMG decomposition system, like any pattern recognition system, the features used for representing MUPs play an important role in the overall performance of the system...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752236/effect-of-the-synchronization-based-control-of-a-wearable-robot-having-a-non-exoskeletal-structure-on-the-hemiplegic-gait-of-stroke-patients
#12
Noriaki Mizukami, Shizue Takeuchi, Mikio Tetsuya, Atsushi Tsukahara, Kunihiro Yoshida, Akira Matsushima, Yoichi Maruyama, Kenji Tako, Minoru Hashimoto
We have been developing the robotic wear curara as both a welfare device and rehabilitation robot that assists the elderly and disabled. curara is aimed at user friendliness. We have, thus, chosen a non-exoskeleton structure made of a plastic so that the robot is as light in weight as possible and to minimize the restraining stress against natural human movement. We verified the assistance effect of curara on 15 hemiplegic patients with stroke by comparing gait parameters (i.e., velocity, step length, cadence, and symmetry of joint angles) among three conditions...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752235/minimizing-postural-demands-of-walking-while-still-emphasizing-locomotor-force-generation-for-nonimpaired-individuals
#13
Sarah A Graham, Christopher P Hurt, David A Brown
In motor control studies, the interdependent nature of the neural controllers for posture and locomotion makes it difficult to separate components of stepping control from postural maintenance functions. To better understand the separate influences of postural versus locomotor control during walking, we fabricated a novel postural support apparatus. This apparatus was intended to minimize the postural demands of walking but allow for matched locomotor force generation, thus isolating the control of stepping...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752234/a-stair-ascent-and-descent-controller-for-a-powered-ankle-prosthesis
#14
Steven Culver, Harrison Bartlett, Amanda Shultz, Michael Goldfarb
This paper presents a control system for a powered transtibial prosthesis that provides stair ascent and descent capability, as well as ability for user-controlled transitions between walking, standing, stair ascent, and stair descent. The control system was implemented on a powered prosthesis and evaluated on a single unilateral transtibial amputee subject. The ability of the prosthesis to provide appropriate functionality during stair ascent and descent was assessed by comparing gait kinematics and kinetics of the prosthesis to those of a passive dynamic elastic response prosthesis and those of a set of non-amputee subjects...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752233/electro-physiology-of-coupling-model-and-its-impact-on-naja-kaouthia-venom-treated-sciatic-nerves-of-toad
#15
H K Das, P P Sahu
Demyelination in peripheral nerves causes dysfunction of slowing down and stoppage of nerve impulses causing many neurological diseases, such as chronic inflammatory demyelinating polyneuropathy, Guillain-Barre syndrome, etc. This paper aims to develop a recovery model having interaction of a demyelinated nerve with a normal myelinated nerve. We validated the model by coupling between peripheral nerve of toad (demyelinated with Naja kaouthia venom) and a normal nerve of toad. An increase in both nerve conduction velocity as well as compound action potential amplitude is observed in the repetition of the experiments indicating gradual recovery of the patients...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752232/modulation-of-spectral-power-and-functional-connectivity-in-human-brain-by-acupuncture-stimulation
#16
Haitao Yu, Xinyu Wu, Lihui Cai, Bin Deng, Jiang Wang
Acupuncture, as an external stimulation, can produce clinical effects via the central nervous system. In order to investigate the modulatory efficacy of acupuncture on brain activity, multichannel EEG signals evoked by acupuncture at "Zusanli" acupoint were recorded from healthy humans in three states: pre-acupuncture, acupuncture, and post-acupuncture. Power spectral density is first used to analyze the EEG power change during acupuncture process. It is found that EEG power significantly increased in the delta and alpha bands under acupuncture and high power level remained in alpha band after acupuncture...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752231/temporal-neuromodulation-of-retinal-ganglion-cells-by-low-frequency-focused-ultrasound-stimulation
#17
Qiuju Jiang, Guofeng Li, Huixia Zhao, Wenlong Sheng, Lan Yue, Min Su, Shijun Weng, Leanne Lai-Hang Chan, Qifa Zhou, Mark S Humayun, Weibao Qiu, Hairong Zheng
Significant progress has been made recently in treating neurological blindness using implantable visual prostheses. However, implantable medical devices are highly invasive and subject to many safety, efficacy, and cost issues. The discovery that ultrasound (US) may be useful as a noninvasive neuromodulation tool has aroused great interest in the field of acoustic retinal prostheses (ARPs). We have investigated the responsiveness of rat retinal ganglion cells (RGCs) to low-frequency focused US stimulation (LFUS) at 2...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752230/highly-efficient-compression-algorithms-for-multichannel-eeg
#18
Laxmi Shaw, Daleef Rahman, Aurobinda Routray
The difficulty associated with processing and understanding the high dimensionality of electroencephalogram (EEG) data requires developing efficient and robust compression algorithms. In this paper, different lossless compression techniques of single and multichannel EEG data, including Huffman coding, arithmetic coding, Markov predictor, linear predictor, context-based error modeling, multivariate autoregression (MVAR), and a low complexity bivariate model have been examined and their performances have been compared...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752229/correlated-component-analysis-for-enhancing-the-performance-of-ssvep-based-brain-computer-interface
#19
Yangsong Zhang, Daqing Guo, Fali Li, Erwei Yin, Yu Zhang, Peiyang Li, Qibin Zhao, Toshihisa Tanaka, Dezhong Yao, Peng Xu
A new method for steady-state visual evoked potentials (SSVEPs) frequency recognition is proposed to enhance the performance of SSVEP-based brain-computer interface (BCI). Correlated component analysis (CORCA) is introduced, which originally was designed to find linear combinations of electrodes that are consistent across subjects and maximally correlated between them. We propose a CORCA algorithm to learn spatial filters with multiple blocks of individual training data for SSVEP-based BCI scenario. The spatial filters are used to remove background noises by combining the multichannel electroencephalogram signals...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752228/exploring-cognitive-flexibility-with-a-noninvasive-bci-using-simultaneous-steady-state-visual-evoked-potentials-and-sensorimotor-rhythms
#20
Bradley J Edelman, Jianjun Meng, Nicholas Gulachek, Christopher C Cline, Bin He
EEG-based brain-computer interface (BCI) technology creates non-biological pathways for conveying a user's mental intent solely through noninvasively measured neural signals. While optimizing the performance of a single task has long been the focus of BCI research, in order to translate this technology into everyday life, realistic situations, in which multiple tasks are performed simultaneously, must be investigated. In this paper, we explore the concept of cognitive flexibility, or multitasking, within the BCI framework by utilizing a 2-D cursor control task, using sensorimotor rhythms (SMRs), and a four-target visual attention task, using steady-state visual evoked potentials (SSVEPs), both individually and simultaneously...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
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