Abstract:
:BACKGROUND: In investigations of the human motor system, two approaches are generally employed toward the identification of common modulating drives from motor unit recordings. One is a frequency domain method and uses the coherence function to determine the degree of linear correlation between each frequency component of the signals. The other is a time domain method that has been developed to determine the strength of low frequency common modulations between motor unit spike trains, often referred to in the literature as 'common drive'. METHODS: The relationships between these methods are systematically explored using both mathematical and experimental procedures. A mathematical derivation is presented that shows the theoretical relationship between both time and frequency domain techniques. Multiple recordings from concurrent activities of pairs of motor units are studied and linear regressions are performed between time and frequency domain estimates (for different time domain window sizes) to assess their equivalence. RESULTS: Analytically, it may be demonstrated that under the theoretical condition of a narrowband point frequency, the two relations are equivalent. However practical situations deviate from this ideal condition. The correlation between the two techniques varies with time domain moving average window length and for window lengths of 200 ms, 400 ms and 800 ms, the r2 regression statistics (p < 0.05) are 0.56, 0.81 and 0.80 respectively. CONCLUSIONS: Although theoretically equivalent and experimentally well correlated there are a number of minor discrepancies between the two techniques that are explored. The time domain technique is preferred for short data segments and is better able to quantify the strength of a broad band drive into a single index. The frequency domain measures are more encompassing, providing a complete description of all oscillatory inputs and are better suited to quantifying narrow ranges of descending input into a single index. In general the physiological question at hand should dictate which technique is best suited.
journal_name
J Neuroeng Rehabiljournal_title
Journal of neuroengineering and rehabilitationauthors
Myers LJ,Erim Z,Lowery MMdoi
10.1186/1743-0003-1-2subject
Has Abstractpub_date
2004-10-14 00:00:00pages
2issue
1issn
1743-0003pii
1743-0003-1-2journal_volume
1pub_type
杂志文章abstract:BACKGROUND:Rehabilitation robotics is progressing towards developing robots that can be used as advanced tools to augment the role of a therapist. These robots are capable of not only offering more frequent and more accessible therapies but also providing new insights into treatment effectiveness based on their ability...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-10-102
更新日期:2013-09-28 00:00:00
abstract:BACKGROUND:Previous reports of the mechanics and energetics of post-stroke hemiparetic walking have either not combined estimates of mechanical and metabolic energy or computed external mechanical work based on the limited combined limbs method. Here we present a comparison of the mechanics and energetics of hemipareti...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-015-0012-x
更新日期:2015-02-27 00:00:00
abstract: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 ER...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-017-0294-2
更新日期:2017-08-25 00:00:00
abstract:BACKGROUND:Cycling has been used in the rehabilitation of individuals with both chronic and post-surgical conditions. Among the challenges with implementing bicycling for rehabilitation is the recruitment of both extremities, in particular when one is weaker or less coordinated. Feedback embedded in virtual reality (VR...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-11-93
更新日期:2014-06-05 00:00:00
abstract:BACKGROUND:It is the purpose of this article to identify and review criteria that rehabilitation technology should meet in order to offer arm-hand training to stroke patients, based on recent principles of motor learning. METHODS:A literature search was conducted in PubMed, MEDLINE, CINAHL, and EMBASE (1997-2007). RE...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章,评审
doi:10.1186/1743-0003-6-1
更新日期:2009-01-20 00:00:00
abstract::Transcranial magnetic stimulation (TMS) has quickly progressed from a technical curiosity to a bona-fide tool for neurological research. The impetus has been due to the promising results obtained when using TMS to uncover neural processes in normal human subjects, as well as in the treatment of intractable neurologica...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章,评审
doi:10.1186/1743-0003-6-7
更新日期:2009-03-02 00:00:00
abstract:BACKGROUND:Treadmill training, with or without body-weight support (BWSTT), typically involves high step count, faster walking speed, and higher heart-rate intensity than overground walking training. The addition of challenging mobility skill practice may offer increased opportunities to improve walking and balance ski...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12984-018-0442-3
更新日期:2018-11-01 00:00:00
abstract::Unfortunately, the original version of this article [1] contained an error. Equation 6 was included incorrectly: in the original equation variable slinks3 was missing.The correct Equation 6 can be found below: ...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 已发布勘误
doi:10.1186/s12984-015-0106-5
更新日期:2015-12-04 00:00:00
abstract:BACKGROUND:Gait abnormalities have been reported in individuals with Chronic Fatigue Syndrome (CFS) however no studies exist to date investigating the kinematics of individuals with CFS in over-ground gait. The aim of this study was to compare the over-ground gait pattern (sagittal kinematics and temporal and spatial) ...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-5-16
更新日期:2008-05-27 00:00:00
abstract:BACKGROUND:An important measure of the performance of a myoelectric (ME) control system for powered artificial limbs is the signal-to-noise ratio (SNR) at the output of ME channel. However, few studies illustrated the neuron-muscular interactive effects on the SNR at ME control channel output. In order to obtain a comp...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-4-29
更新日期:2007-08-08 00:00:00
abstract:OBJECTIVE:To study the effects of reduced lighting on the gait of older adults with a high level gait disorder (HLGD) and to compare their response to that of healthy elderly controls. METHODS:22 patients with a HLGD and 20 age-matched healthy controls were studied under usual lighting conditions (1000 lumens) and in ...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-2-27
更新日期:2005-08-28 00:00:00
abstract::Even though feedback is considered to play an important role in learning how to operate a brain-computer interface (BCI), to date no significant influence of feedback design on BCI-performance has been reported in literature. In this work, we adapt a standard motor-imagery BCI-paradigm to study how BCI-performance is ...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-7-34
更新日期:2010-07-27 00:00:00
abstract:BACKGROUND:For evaluation of upper limb impairment and activity capacity, Fugl-Meyer Assessment of Upper Extremity (FMA-UE) and Action Research Arm Test (ARAT) are recommended to be included in stroke trials. To improve the understanding of mechanisms of motor recovery, and differentiate between restitution and compens...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-019-0551-7
更新日期:2019-07-01 00:00:00
abstract: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 se...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-017-0302-6
更新日期:2017-09-06 00:00:00
abstract:BACKGROUND:Chronic upper limb motor impairment is a common outcome of stroke. Therapeutic training can reduce motor impairment. Recently, a growing interest in evaluating motor training provided by robotic assistive devices has emerged. Robot-assisted therapy is attractive because it provides a means of increasing prac...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-017-0335-x
更新日期:2017-12-06 00:00:00
abstract:BACKGROUND:Textile-based transducers are an emerging technology in which piezo-resistive properties of materials are used to measure an applied strain. By incorporating these sensors into a sock, this technology offers the potential to detect critical events during the stance phase of the gait cycle. This could prove u...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-8-32
更新日期:2011-05-27 00:00:00
abstract:BACKGROUND:Treadmill training with bodyweight support and manual assistance improves walking ability of patients with neurological injury. The purpose of this study was to determine how manual assistance changes muscle activation and kinematic patterns during treadmill training in individuals with incomplete spinal cor...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 临床试验,杂志文章
doi:10.1186/1743-0003-4-32
更新日期:2007-08-21 00:00:00
abstract::The general objective of the "Rehabilitation Medicine Summit: Building Research Capacity" was to advance and promote research in medical rehabilitation by making recommendations to expand research capacity. The five elements of research capacity that guided the discussions were: 1) researchers; 2) research culture, en...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-3-1
更新日期:2006-01-03 00:00:00
abstract:BACKGROUND:Multiple sclerosis (MS) is a disabling disease affecting the central nervous system and consequently the whole body's functional systems resulting in different gait disorders. Fatigue is the most common symptom in MS with a prevalence of 80%. Previous research studied the relation between fatigue and gait im...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-020-00798-9
更新日期:2020-12-18 00:00:00
abstract:BACKGROUND:The use of neurorobotic devices may improve gait recovery by entraining specific brain plasticity mechanisms, which may be a key issue for successful rehabilitation using such approach. We assessed whether the wearable exoskeleton, Ekso™, could get higher gait performance than conventional overground gait tr...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12984-018-0377-8
更新日期:2018-04-25 00:00:00
abstract:BACKGROUND:Individuals with severe physical disabilities and minimal motor behaviour may be unable to use conventional mechanical switches for access. These persons may benefit from access technologies that harness the volitional activity of muscles. In this study, we describe the design and demonstrate the performance...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-7-22
更新日期:2010-05-21 00:00:00
abstract:BACKGROUND:Visual brain-computer interfaces (BCIs) often yield high performance only when targets are fixated with the eyes. Furthermore, many paradigms use intense visual stimulation, which can be irritating especially in long BCI sessions. However, BCIs can more directly directly tap the neural processes underlying v...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-8-24
更新日期:2011-05-05 00:00:00
abstract:BACKGROUND:A complete spinal cord transection results in loss of all supraspinal motor control below the level of the injury. The neural circuitry in the lumbosacral spinal cord, however, can generate locomotor patterns in the hindlimbs of rats and cats with the aid of motor training, epidural stimulation and/or admini...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-9-38
更新日期:2012-06-12 00:00:00
abstract:BACKGROUND:Body weight support (BWS) systems have shown promise as rehabilitation tools for neurologically impaired individuals. This paper reviews the experiment-based research on BWS systems with the aim: (1) To investigate the influence of body weight unloading (BWU) on gait characteristics; (2) To study whether the...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-018-0380-0
更新日期:2018-06-20 00:00:00
abstract::Therapies for motor recovery after stroke or traumatic brain injury are still not satisfactory. To date the best approach seems to be the intensive physical therapy. However the results are limited and functional gains are often minimal. The goal of motor training is to minimize functional disability and optimize func...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章,评审
doi:10.1186/1743-0003-6-8
更新日期:2009-03-17 00:00:00
abstract:BACKGROUND:Rhythmic Auditory Stimulation (RAS) can compensate for the loss of automatic and rhythmic movements in patients with idiopathic Parkinson's disease (PD). However, the neurophysiological mechanisms underlying the effects of RAS are still poorly understood. We aimed at identifying which mechanisms sustain gait...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12984-019-0533-9
更新日期:2019-06-07 00:00:00
abstract:BACKGROUND:Functional electrical stimulation (FES) during repetitive practice of everyday tasks can facilitate recovery of upper limb function following stroke. Reduction in impairment is strongly associated with how closely FES assists performance, with advanced iterative learning control (ILC) technology providing pr...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 临床试验,杂志文章
doi:10.1186/1743-0003-11-105
更新日期:2014-06-30 00:00:00
abstract:BACKGROUND:Many contemporary systems for neurorehabilitation utilize 3D virtual environments (VEs) that allow for training patients' hand or arm movements. In the current paper we comparatively test the effectiveness of two characteristics of VEs in rehabilitation training when utilizing a 3D haptic interaction device:...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/1743-0003-9-73
更新日期:2012-10-05 00:00:00
abstract:BACKGROUND:Task-specific perturbation training is a widely studied means of fall prevention, utilizing techniques that induce slips or slip-like perturbations during gait. Though effective, these methods only simulate narrow ranges within the larger space of possible slipping conditions encountered in daily life. Here ...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-019-0602-0
更新日期:2019-10-17 00:00:00
abstract:BACKGROUND:Postural control requires numerous inputs interacting across multiple temporospatial scales. This organization, evidenced by the "complexity" contained within standing postural sway fluctuations, enables diverse system functionality. Age-related reduction of foot-sole somatosensation reduces standing postura...
journal_title:Journal of neuroengineering and rehabilitation
pub_type: 杂志文章
doi:10.1186/s12984-016-0152-7
更新日期:2016-05-03 00:00:00