Dataset Information

Effect of opposing needling on motor cortex excitability in healthy participants and in patients with post-stroke hemiplegia: study protocol for a single-blind, randomised controlled trial.

ABSTRACT:

Background

Opposing needling has an obvious curative effect in the treatment of post-stroke hemiplegia; however, the mechanism of the opposing needling in the treatment of post-stroke hemiplegia is still not clear. The purpose of this study is to investigate the effect of opposing needling on the excitability of primary motor cortex (M1) of healthy participants and patients with post-stroke hemiplegia, which may provide insight into the mechanisms of opposing needling in treating post-stroke hemiplegia.

Methods

This will be a single-blind, randomised, sham-controlled trial in which 80 healthy participants and 40 patients with post-stroke hemiplegia will be recruited. Healthy participants will be randomised 1:1:1:1 to the 2-Hz, 50-Hz, 100-Hz, and sham electroacupuncture groups. Patients with post-stroke hemiplegia will be randomised 1:1 to the opposing needling or conventional treatment groups. The M1 will be located in all groups by using neuroimaging-based navigation. The stimulator coil of transcranial magnetic stimulation (TMS) will be moved over the left and right M1 in order to identify the TMS hotspot, followed by a recording of resting motor thresholds (RMTs) and motor-evoked potentials (MEPs) of the thenar muscles induced by TMS before and after the intervention. The primary outcome measure will be the percent change in the RMTs of the thenar muscles at baseline and after the intervention. The secondary outcome measures will be the amplitude (μV) and latency (ms) of the MEPs of the thenar muscles at baseline and after the intervention.

Discussion

The aim of this trial is to explore the effect of opposing needling on the excitability of M1 of healthy participants and patients with post-stroke hemiplegia.

Trial registration

Chinese Clinical Trial Registry ChiCTR1900028138 . Registered on 13 December 2019.

SUBMITTER: Xu M

PROVIDER: S-EPMC8296658 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Effect of opposing needling on motor cortex excitability in healthy participants and in patients with post-stroke hemiplegia: study protocol for a single-blind, randomised controlled trial.

Xu Mindong M Zi Yinyu Y Wu Jianlu J Xu Nenggui N Lu Liming L Liu Jiahui J Yu Yanling Y Mo Haofeng H Wen Weifeng W Tang Xiaorong X Fan Wenjuan W Zhang Yu Y Liu Churong C Yi Wei W Wang Lin L

Trials 20210722 1

<h4>Background</h4>Opposing needling has an obvious curative effect in the treatment of post-stroke hemiplegia; however, the mechanism of the opposing needling in the treatment of post-stroke hemiplegia is still not clear. The purpose of this study is to investigate the effect of opposing needling on the excitability of primary motor cortex (M1) of healthy participants and patients with post-stroke hemiplegia, which may provide insight into the mechanisms of opposing needling in treating post-st ...[more]

PMID: 34294134

Similar Datasets

Project description:BackgroundNumerous randomized controlled trials on the effects of electro-acupuncture have been conducted to treat dysphagia as a sequela of stroke. However, the normal physiological mechanisms of swallowing and the pathological mechanisms of dysphagia are not fully understood. The purpose of this study is to investigate whether lateralization of the human swallowing motor cortex excitability in healthy subjects will be influenced by electro-acupuncture to Lianquan (CV 23) and Fengfu (GV 16), which may provide insight into the pathological mechanisms of dysphagia after stroke.MethodsWe designed a single-blind, randomized, sham-controlled trial in which 40 healthy subjects will be recruited. Subjects will be randomized 1:1 into two groups: the electro-acupuncture group and the sham-control electro-acupuncture group. The swallowing motor cortex will be located in both groups using a neuroimaging navigation system. Then left and right cortical stimulation will be measured by transcranial magnetic stimulation (TMS) before and after electro-acupuncture or sham electro-acupuncture. The electro-acupuncture or sham electro-acupuncture interventions will last for 15 min. The primary outcome measure will be percent change in the resting motor threshold (RMT) of the mylohyoid. The secondary outcome measures will be the amplitude (μV) and latency (ms) of the motor evoked potential (MEP) of the mylohyoid as a proxy for the TMS evoked potential. All outcomes will be measured at baseline and after the electro-acupuncture or sham electro-acupuncture treatment.DiscussionThe aim of this trial is to explore whether lateralization of the human swallowing motor cortex excitability in healthy subjects is present, and to determine if electro-acupuncture to acupuncture points Lianquan (CV 23) and Fengfu (GV 16) will exert an effect on it under normal physiological conditions.Trial registrationChinese Clinical Trial Registry, ChiCTR-IOR-17011359 . Registered on 11 May 2017.

Project description:Motor skills are frequently impaired in multiple sclerosis (MS) patients following grey and white matter damage with cortical excitability abnormalities. We applied advanced diffusion imaging with 3T magnetic resonance tomography for neurite orientation dispersion and density imaging (NODDI), as well as diffusion tensor imaging (DTI) in 50 MS patients and 49 age-matched healthy controls to quantify microstructural integrity of the motor system. To assess excitability, we determined resting motor thresholds using non-invasive transcranial magnetic stimulation. As measures of cognitive-motor performance, we conducted neuropsychological assessments including the Nine-Hole Peg Test, Trail Making Test part A and B (TMT-A and TMT-B) and the Symbol Digit Modalities Test (SDMT). Patients were evaluated clinically including assessments with the Expanded Disability Status Scale. A hierarchical regression model revealed that lower neurite density index (NDI) in primary motor cortex, suggestive for axonal loss in the grey matter, predicted higher motor thresholds, i.e. reduced excitability in MS patients (p = .009, adjusted r² = 0.117). Furthermore, lower NDI was indicative of decreased cognitive-motor performance (p = .007, adjusted r² = .142 for TMT-A; p = .009, adjusted r² = .129 for TMT-B; p = .006, adjusted r² = .142 for SDMT). Motor WM tracts of patients were characterized by overlapping clusters of lowered NDI (p <.05, Cohen's d = 0.367) and DTI-based fractional anisotropy (FA) (p <.05, Cohen's d = 0.300), with NDI exclusively detecting a higher amount of abnormally appearing voxels. Further, orientation dispersion index of motor tracts was increased in patients compared to controls, suggesting a decreased fiber coherence (p <.05, Cohen's d = 0.232). This study establishes a link between microstructural characteristics and excitability of neural tissue, as well as cognitive-motor performance in multiple sclerosis. We further demonstrate that the NODDI parameters neurite density index and orientation dispersion index detect a larger amount of abnormally appearing voxels in patients compared to healthy controls, as opposed to the classical DTI parameter FA. Our work outlines the potential for microstructure imaging using advanced biophysical models to forecast excitability alterations in neuroinflammation.

Dataset Information

Effect of opposing needling on motor cortex excitability in healthy participants and in patients with post-stroke hemiplegia: study protocol for a single-blind, randomised controlled trial.

Background

Methods

Discussion

Trial registration

Publications

Effect of opposing needling on motor cortex excitability in healthy participants and in patients with post-stroke hemiplegia: study protocol for a single-blind, randomised controlled trial.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets