Filtered By:
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering
This page shows you your search results in order of relevance. This is page number 6.
Order by Relevance | Date
Total 279 results found since Jan 2013.
Post-Stroke Lower Limb Spasticity Alters the Interlimb Temporal Synchronization of Centre of Pressure Displacements Across Multiple Timescales
Lower limb spasticity is a common sensorimotor consequence post-stroke, which further complicates stability control by altering the temporal relationship between individual-limb centre of pressure (COP) displacements. The present work employed the discrete wavelet transform to better understand the influence of lower limb spasticity on the control of standing balance, which occurs across multiple timescales. An 8-level decomposition of the individual-limb COP was performed, using retrospective data from 91 stroke survivors with (n = 29) and without (n = 56) lower limb spasticity. Inter-limb temporal synchrony and spatial s...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - September 1, 2015 Category: Neuroscience Source Type: research
Application of the ${rm F}$-Response for Estimating Motor Unit Number and Amplitude Distribution in Hand Muscles of Stroke Survivors
The ${rm F}$-response was used in this study to assess changes in the first dorsal interosseous (FDI) muscle after a hemispheric stroke. The number of motor units and their sizes were estimated bilaterally in 12 stroke survivors by recording both the compound muscle action potential (CMAP) and ${rm F}$ wave responses. These ${rm F}$ waves were induced by applying a large number of electrical stimuli to the ulnar nerve. The amplitude distribution of individual motor unit action potentials (MUAPs) was also compared between paretic and contralateral muscles. When averaged across all the subjects, a significantly lower motor u...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - May 31, 2016 Category: Neuroscience Source Type: research
Compensating Hand Function in Chronic Stroke Patients Through the Robotic Sixth Finger
A novel solution to compensate hand grasping abilities is proposed for chronic stroke patients. The goal is to provide the patients with a wearable robotic extra-finger that can be worn on the paretic forearm by means of an elastic band. The proposed prototype, the Robotic Sixth Finger, is a modular articulated device that can adapt its structure to the grasped object shape. The extra-finger and the paretic hand act like the two parts of a gripper cooperatively holding an object. We evaluated the feasibility of the approach with four chronic stroke patients performing a qualitative test, the Frenchay Arm Test. In this proo...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - January 31, 2017 Category: Neuroscience Source Type: research
Benefits of Using a Voice and EMG-Driven Actuated Glove to Support Occupational Therapy for Stroke Survivors
In conclusion, therapy effectiveness appeared to be increased by employment of the VAEDA glove, which directly targets deficits in muscle activation patterns.
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - March 1, 2017 Category: Neuroscience Source Type: research
Changes of Shoulder, Elbow, and Wrist Stiffness Matrix Post Stroke
Stroke affects multiple joints in the arm with stereotypical patterns of arm deformity involving the shoulder, elbow, wrist, and hand and with disrupted coordination of multiple joints in active movements. However, there is a lack of systematic methods to evaluate multi-joints and multi-degree of freedoms (DOF) neuro-mechanical changes, especially for complex systems with three or more joints/DOFs involved. This paper used a novel systematic method to characterize dynamics and control of the shoulder, elbow, and wrist of the human arm individually and simultaneously, including the couplings across the multiple joints durin...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - July 1, 2017 Category: Neuroscience Source Type: research
Training the Unimpaired Arm Improves the Motion of the Impaired Arm and the Sitting Balance in Chronic Stroke Survivors
Robot-assisted rehabilitation of stroke survivors mainly focuses on the impaired side of the body while the role of the unimpaired side in the recovery after stroke is still controversial. The goal of this study is to investigate the influence on sitting balance and paretic arm functions of a training protocol based on movements of the unimpaired arm. Sixteen chronic stroke survivors underwent nineteen training sessions, in which they performed active movements with the unimpaired arm supported by a passive exoskeleton. Performance of the trunk and upper limbs was evaluated before treatment, after treatment and at six mont...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - July 1, 2017 Category: Neuroscience Source Type: research
Quantitative EEG for Predicting Upper Limb Motor Recovery in Chronic Stroke Robot-Assisted Rehabilitation
Stroke is a leading cause for adult disability, which in many cases causes motor deficits. Despite the developments in motor rehabilitation techniques, recovery of upper limb functions after stroke is limited and heterogeneous in terms of outcomes, and knowledge of important factors that may affect the outcome of the therapy is necessary to make a reasonable prediction for individual patients. In this paper, we assessed the relationship between quantitative electroencephalographic (QEEG) measures and the motor outcome in chronic stroke patients that underwent a robot-assisted rehabilitation program to evaluate the utility ...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - July 1, 2017 Category: Neuroscience Source Type: research
Low-Frequency Intracortical Electrical Stimulation Decreases Sensorimotor Cortex Hyperexcitability in the Acute Phase of Ischemic Stroke
The objective of the present study was to investigate the effects of low-frequency intracortical electrical stimulation (lf-ICES) applied to the ischemia-affected sensorimotor cortex immediately following ischemic stroke. Twenty male Sprague-Dawley rats were instrumented with an intracortical microelectrode array (IC MEA) and a cuff-electrode around the sciatic nerve. Photothrombosis intervention was performed within the sensorimotor cortex and the electrophysiological changes were assessed by analysis of the neural responses to stimulation of the sciatic nerve. Neuroprotection intervention consisted of eight 23 min lf-ICE...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - August 1, 2017 Category: Neuroscience Source Type: research
Portable and Reconfigurable Wrist Robot Improves Hand Function for Post-Stroke Subjects
Rehabilitation robots have become increasingly popular for stroke rehabilitation. However, the high cost of robots hampers their implementation on a large scale. This paper implements the concept of a modular and reconfigurable robot, reducing its cost and size by adopting different therapeutic end effectors for different training movements using a single robot. The challenge is to increase the robot’s portability and identify appropriate kinds of modular tools and configurations. Because literature on the effectiveness of this kind of rehabilitation robot is still scarce, this paper presents the design of a portabl...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - October 1, 2017 Category: Neuroscience Source Type: research
Electrical Impedance Myography for Evaluating Paretic Muscle Changes After Stroke
Electrical impedance myography (EIM) was used to assess the paretic muscle intrinsic electrical properties post stroke. Twenty-seven subjects with chronic hemiparesis participated in this study. Muscle impedance was measured by applying high-frequency, low-intensity alternating current to biceps brachii muscles. Major EIM parameters, resistance ( $R$ ), reactance ( $X$ ), phase angle ( $theta $ ), and electrical anisotropy ratios (AR) of the three parameters, were examined at 50 kHz. Statistical analysis demonstrated significant reduction of reactance, phase angle, AR of resistance, and AR of reactance in the paretic muscl...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - November 1, 2017 Category: Neuroscience Source Type: research
Robot Training With Vector Fields Based on Stroke Survivors’ Individual Movement Statistics
The wide variation in upper extremity motor impairments among stroke survivors necessitates more intelligent methods of customized therapy. However, current strategies for characterizing individual motor impairments are limited by the use of traditional clinical assessments (e.g., Fugl-Meyer) and simple engineering metrics (e.g., goal-directed performance). Our overall approach is to statistically identify the range of volitional movement capabilities, and then apply a robot-applied force vector field intervention that encourages under-expressed movements. We investigated whether explorative training with such customized f...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - February 1, 2018 Category: Neuroscience Source Type: research
Automated FES for Upper Limb Rehabilitation Following Stroke and Spinal Cord Injury
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. T...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - May 1, 2018 Category: Neuroscience Source Type: research
Wrist Robot-Assisted Rehabilitation Treatment in Subacute and Chronic Stroke Patients: From Distal-to-Proximal Motor Recovery
In this paper, the recovery of proximal and distal segments in stroke patients who received distal training alone was investigated. Forty (20 subacute and 20 chronic) stroke patients were recruited to perform wrist robot-assisted rehabilitation training. The upper extremity, shoulder–elbow, and wrist subsections of the Fugl-Meyer assessment scale were used to assess the motor recovery of distal and proximal segments. In addition, the modified Ashworth scale, motricity index, and box and block test were used as clinical outcome measures together with kinematic parameters to evaluate the effects of the training. Signi...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - September 1, 2018 Category: Neuroscience Source Type: research
Camera-Based Mirror Visual Feedback: Potential to Improve Motor Preparation in Stroke Patients
Mirror visual feedback (MVF) is used widely for motor recovery after stroke, but an optimal training setup and systematic procedure are lacking. New optimization strategies have been proposed, one of which is a camera technique. We investigated the effects of a camera-based MVF setup on motor function and motor processes upstream for upper-limb rehabilitation. Seventy-nine stroke patients were assigned randomly to the MVF group (MG; ${N} = {38}$ ) or conventional group (CG; ${N} = {41}$ ), which, respectively, received camera-based MVF and dosage-equivalent physiotherapy or/and occupational therapy for 1 h/day and five day...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - September 1, 2018 Category: Neuroscience Source Type: research
Biomedical Serious Game System for Balance Rehabilitation of Hemiparetic Stroke Patients
Hemiparetic stroke patients can have several muscular and postural disorders which compromise their balance. Serious games (SG) emerged as a new approach to enhance conventional treatment by making it a motivating method to meet individual needs. This paper evaluated the therapeutic effects of a biomedical SG system developed for balance evaluation and training of hemiparetic stroke patients. The system consists of a balance board with inertial sensors and a computer system that runs the game. A novel scoring system for balance evaluation, which extracts metric information regarding patients’ performance while gamin...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - November 1, 2018 Category: Neuroscience Source Type: research
