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A Novel Closed-Loop Electrical Brain Stimulation Device Featuring Wireless Low-Energy Ultrasound Power and Communication 具有无线低能量超声波功率和通信功能的新型闭环脑电刺激装置
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.02.008

Objectives

This study aimed to indicate the feasibility of a prototype electrical neuromodulation system using a closed-loop energy-efficient ultrasound-based mechanism for communication, data transmission, and recharging.

Materials and Methods

Closed-loop deep brain stimulation (DBS) prototypes were designed and fabricated with ultrasonic wideband (UsWB) communication technology and miniaturized custom electronics. Two devices were implanted short term in anesthetized Göttingen minipigs (N = 2). Targeting was performed using preoperative magnetic resonance imaging, and locations were confirmed postoperatively by computerized tomography. DBS systems were tested over a wide range of stimulation settings to mimic minimal, typical, and/or aggressive clinical settings, and evaluated for their ability to transmit data through scalp tissue and to recharge the DBS system using UsWB.

Results

Stimulation, communication, reprogramming, and recharging protocols were successfully achieved in both subjects for amplitude (1V–6V), frequency (50–250 Hz), and pulse width (60–200 μs) settings and maintained for ≥six hours. The precision of pulse settings was verified with <5% error. Communication rates of 64 kbit/s with an error rate of 0.05% were shown, with no meaningful throughput degradation observed. Time to recharge to 80% capacity was <9 minutes. Two DBS systems also were implanted in the second test animal, and independent bilateral stimulation was successfully shown.

Conclusions

The system performed at clinically relevant implant depths and settings. Independent bilateral stimulation for the duration of the study with a 4F energy storage and full rapid recharge were achieved. Continuous function extrapolates to six days of continuous stimulation in future design iterations implementing application specific integrated circuit level efficiency and 15F storage capacitance. UsWB increases energy efficiency, reducing storage requirements and thereby enabling device miniaturization. The device can enable intelligent closed-loop stimulation, remote system monitoring, and optimization and can serve as a power/data gateway to interconnect the intrabody network with the Internet of Medical Things.
研究目的:本研究旨在说明电神经调控系统原型的可行性:本研究旨在说明利用基于超声波的闭环节能机制进行通信、数据传输和充电的电神经调控系统原型的可行性:利用超声波宽带(UsWB)通信技术和小型化定制电子设备设计和制造了闭环脑深部刺激(DBS)原型。两台设备被短期植入麻醉的哥廷根小型猪(N = 2)体内。术前通过磁共振成像进行定位,术后通过计算机断层扫描确认位置。对 DBS 系统进行了广泛的刺激设置测试,以模拟最小、典型和/或激进的临床设置,并评估了其通过头皮组织传输数据的能力以及使用 UsWB 为 DBS 系统充电的能力:两名受试者都成功实现了振幅(1V-6V)、频率(50-250 Hz)和脉宽(60-200 μs)设置的刺激、通信、重新编程和充电协议,并维持了≥6小时。脉冲设置的精确度已通过结论验证:该系统的植入深度和设置均符合临床要求。在研究期间,该系统通过 4F 能量存储和完全快速充电实现了独立的双侧刺激。在未来的设计迭代中,通过采用特定应用集成电路级效率和 15F 储存电容,可将连续功能推断为六天的连续刺激。UsWB 提高了能源效率,降低了存储要求,从而实现了设备微型化。该设备可实现智能闭环刺激、远程系统监控和优化,并可作为电源/数据网关,将体内网络与医疗物联网互连。
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引用次数: 0
Systematic Review of Experimental Deep Brain Stimulation in Rodent Models of Epilepsy 实验性脑深部电刺激对啮齿动物癫痫模型的系统评价。
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.11.001
Rafi Matin HBSc , Kristina Zhang BMSc , George M. Ibrahim MD, PhD , Flavia Venetucci Gouveia PhD

Objectives

Deep brain stimulation (DBS) is an established neuromodulatory technique for treating drug-resistant epilepsy. Despite its widespread use in carefully selected patients, the mechanisms underlying the antiseizure effects of DBS remain unclear. Herein, we provide a detailed overview of the current literature pertaining to experimental DBS in rodent models of epilepsy and identify relevant trends in this field.

Materials and Methods

A systematic review was conducted using the PubMed MEDLINE database, following PRISMA guidelines. Data extraction focused on study characteristics, including stimulation protocol, seizure and behavioral outcomes, and reported mechanisms of action.

Results

Of the 1788 resultant articles, 164 were included. The number of published articles has grown exponentially in recent decades. Most studies used chemically or electrically induced models of epilepsy. DBS targeting the anterior nucleus of the thalamus, hippocampal formation, or amygdala was most extensively studied. Effective stimulation parameters were identified, and novel stimulation designs were explored, such as closed-loop and unstructured stimulation approaches. Common mechanisms included synaptic modulation through the depression of excitatory neurotransmission and inhibitory release of GABA. At the network level, antiseizure effects were associated with the desynchronization of neural networks, characterized by decreased low-frequency oscillations.

Conclusions

Rodent models have significantly advanced the understanding of disease pathophysiology and the development of novel therapies. However, fundamental questions remain regarding DBS mechanisms, optimal targets, and parameters. Further research is necessary to improve DBS therapy and tailor treatment to individual patient circumstances.
目的:脑深部电刺激(DBS)是治疗耐药癫痫的一种成熟的神经调节技术。尽管DBS在精心挑选的患者中广泛使用,但其抗癫痫作用的机制仍不清楚。在此,我们提供了一个详细的概述有关实验性DBS在啮齿动物癫痫模型的当前文献,并确定在该领域的相关趋势。材料和方法:根据PRISMA指南,使用PubMed MEDLINE数据库进行系统评价。数据提取侧重于研究特征,包括刺激方案、癫痫发作和行为结果,以及报道的作用机制。结果:1788篇文献中,纳入164篇。近几十年来,发表的文章数量呈指数级增长。大多数研究使用化学或电诱导的癫痫模型。针对丘脑前核、海马区或杏仁核的DBS研究最为广泛。确定了有效的增产参数,并探索了新的增产设计,如闭环和非结构化增产方法。常见的机制包括通过抑制兴奋性神经传递和抑制GABA的释放来调节突触。在网络水平上,抗癫痫效应与神经网络的去同步性有关,其特征是低频振荡减少。结论:啮齿类动物模型显著促进了对疾病病理生理学的认识和新疗法的发展。然而,关于DBS机制、最佳靶点和参数的基本问题仍然存在。需要进一步的研究来改进DBS疗法,并根据患者的具体情况定制治疗方案。
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引用次数: 0
Modulation of Local Field Potentials in the Deep Brain of Minipigs Through Transcranial Temporal Interference Stimulation 通过经颅颞叶干扰刺激调节迷你猪大脑深部的局部场电位
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.10.002
Hsiao-Chun Lin PhD , Yi-Hui Wu PhD , Ming-Dou Ker PhD

Objectives

Transcranial temporal interference stimulation (tTIS) is a novel, noninvasive neuromodulation technique to modulate deep brain neural activity. Despite its potential, direct electrophysiological evidence of tTIS effects remains limited. This study investigates the impact of tTIS on local field potentials (LFPs) in the deep brain using minipigs implanted with deep brain electrodes.

Materials and Methods

Three minipigs were implanted with electrodes in the subthalamic nucleus, and tTIS was applied using patch electrode pairs positioned on both sides of the scalp. Stimulation was delivered in sinewave voltage mode with intensities ≤2V. We evaluated the stimulus-response relationship, effects of different carrier frequencies, the range of entrained envelope oscillations, and changes resulting from adjusting the left-right stimulation intensity ratio.

Results

The results indicated that tTIS modulates deep-brain LFPs in an intensity-dependent manner. Carrier frequencies of 1 or 2 kHz were most effective in influencing LFP. Envelope oscillations <200 Hz were effectively entrained into deep-brain LFPs. Adjustments to the stimulation intensity ratio between the left and right sides yielded inconsistent responses, with right-sided stimulation playing a dominant role.

Conclusion

These findings indicate that tTIS can regulate LFP changes in the deep brain, highlighting its potential as a promising tool for future noninvasive neuromodulation applications.
目的:经颅颞部干扰刺激(tTIS)是一种新型的非侵入性神经调控技术,用于调节大脑深部神经活动。尽管经颅颞区干扰刺激很有潜力,但其效果的直接电生理学证据仍然有限。本研究利用植入大脑深部电极的迷你猪,研究了 tTIS 对大脑深部局部场电位(LFPs)的影响:在三只小猪的丘脑下核植入电极,并使用位于头皮两侧的贴片电极对其施加 tTIS。刺激以正弦波电压模式进行,强度≤2V。我们评估了刺激-反应关系、不同载波频率的影响、夹带包络振荡的范围以及调整左右刺激强度比所产生的变化:结果表明,tTIS 以强度依赖的方式调节深脑 LFP。载波频率为 1 或 2 kHz 对 LFP 的影响最为有效。包络振荡 结论:这些研究结果表明,tTIS 可以调节大脑深部的 LFP 变化,突出了其作为未来无创神经调控应用工具的潜力。
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引用次数: 0
Clinically Implemented Sensing-Based Initial Programming of Deep Brain Stimulation for Parkinson’s Disease: A Retrospective Study 临床实施基于感觉的帕金森病深部脑刺激初始规划:一项回顾性研究。
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.11.002
Bart E.K.S. Swinnen MD, PhD , Andrea Fuentes MD , Monica M. Volz FNP, MSN , Susan Heath , Philip A. Starr MD, PhD , Simon J. Little MD, PhD , Jill L. Ostrem MD

Objectives

Initial deep brain stimulation (DBS) programming using a monopolar review is time-consuming, subjective, and burdensome. Incorporating neurophysiology has the potential to expedite, objectify, and automatize initial DBS programming. We aimed to assess the feasibility and performance of clinically implemented sensing-based initial DBS programming for Parkinson’s disease (PD).

Materials and Methods

We conducted a single-center retrospective study in 15 patients with PD (25 hemispheres) implanted with a sensing-enabled neurostimulator in whom initial subthalamic nucleus/globus pallidus pars interna DBS programming was guided by beta power in real-time local field potential recordings, instead of a monopolar review.

Results

The initial sensing-based programming visit lasted on average 42.2 minutes (SD 18) per hemisphere. During the DBS optimization phase, a conventional monopolar clinical review was not required in any patients. The initial stimulation contact level remained the same at the final follow-up visit in all hemispheres except three. The final amplitude was on average 0.8 mA (SD 0.9) higher than initially set after the original sensing-based programming visit. One year after surgery, off-medication International Parkinson and Movement Disorder Society Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) III total score, tremor subscore, MDS-UPDRS IV, and levodopa-equivalent dose improved by 47.0% (p < 0.001), 77.7% (p = 0.001), 51.1% (p = 0.006), and 44.8% (p = 0.011) compared with preoperatively using this approach.

Conclusions

This study shows that sensing-based initial DBS programming for PD is feasible and rapid, and selected clinically effective contacts in most patients, including those with tremor. Technologic innovations and practical developments could improve sensing-based programming.
目的:使用单极回顾的初始深部脑刺激(DBS)程序是耗时、主观和繁重的。结合神经生理学有可能加快、客观化和自动化初始DBS编程。我们的目的是评估临床实施的基于感知的帕金森病(PD)初始DBS规划的可行性和性能。材料和方法:我们对15例PD患者(25个半球)进行了单中心回顾性研究,植入了具有传感功能的神经刺激器,在这些患者中,最初的丘脑下核/白白球内部DBS编程由实时局部场电位记录的β功率引导,而不是单极回顾。结果:最初基于感觉的编程访问平均持续42.2分钟(SD 18)每个半球。在DBS优化阶段,不需要对任何患者进行常规的单侧临床评价。在最后的随访中,除了三个半球外,所有半球的初始刺激接触水平保持不变。在最初基于传感的编程访问后,最终振幅平均比初始设置高0.8 mA (SD 0.9)。术后1年,国际帕金森与运动障碍学会统一帕金森病评定量表(MDS-UPDRS) III总评分、震颤亚评分、MDS-UPDRS IV和左旋多巴当量剂量较术前分别提高47.0% (p < 0.001)、77.7% (p = 0.001)、51.1% (p = 0.006)和44.8% (p = 0.011)。结论:本研究表明,基于感觉的PD初始DBS规划是可行的、快速的,并在大多数患者中选择了临床有效的接触者,包括震颤患者。技术创新和实际发展可以改善基于感知的编程。
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引用次数: 0
Closed-Loop Deep Brain Stimulation Platform for Translational Research 用于转化研究的闭环深层脑刺激平台。
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.10.012
Yan Li MEng , Yingnan Nie PhD , Xiao Li PhD , Xi Cheng MCS , Guanyu Zhu MD , Jianguo Zhang MD , Zhaoyu Quan PhD , Shouyan Wang PhD

Objective

This study aims to facilitate the translation of innovative closed-loop deep brain stimulation (DBS) strategies from theory to practice by establishing a research platform. The platform addresses the challenges of real-time stimulation artifact removal, low-latency feedback stimulation, and rapid translation from animal to clinical experiments.

Materials and Methods

The platform comprises hardware for neural sensing and stimulation, a closed-loop software framework for real-time data streaming and computation, and an algorithm library for implementing closed-loop DBS strategies. The platform integrates hardware for both animal and clinical research. The closed-loop software framework handles the entire closed-loop stimulation, including data streaming, stimulation artifact removal, preprocessing, a closed-loop stimulation strategy, and stimulation control. It provides a unified programming interface for both C/C++ and Python, enabling secondary development to integrate new closed-loop stimulation strategies. Additionally, the platform includes an algorithm library with signal processing and machine learning methods to facilitate the development of new closed-loop DBS strategies.

Results

The platform can achieve low-latency feedback stimulation control with response times of 6.23 ± 0.85 ms and 6.95 ± 1.11 ms for animal and clinical experiments, respectively. It effectively removed stimulation artifacts and demonstrated flexibility in implementing new closed-loop DBS algorithms. The platform has integrated several typical closed-loop protocols, including threshold-adaptive DBS, amplitude-modulation DBS, dual-threshold DBS and neural state–dependent DBS.

Conclusions

This work provides a research tool for rapidly deploying innovative closed-loop strategies for translational research in both animal and clinical studies. The platform’s capabilities in real-time data processing and low-latency control represent a significant advancement in translational DBS research, with potential implications for the development of more effective therapeutic interventions.
目的:本研究旨在通过建立研究平台,促进创新闭环脑深部刺激(DBS)策略从理论到实践的转化。该平台解决了实时刺激伪影去除、低延迟反馈刺激以及从动物实验到临床实验的快速转化的挑战。材料和方法:该平台包括用于神经传感和刺激的硬件,用于实时数据流和计算的闭环软件框架,以及用于实现闭环DBS策略的算法库。该平台集成了用于动物和临床研究的硬件。闭环软件框架处理整个闭环增产作业,包括数据流、增产工件去除、预处理、闭环增产策略和增产控制。它为C/ c++和Python提供了统一的编程接口,使二次开发能够集成新的闭环刺激策略。此外,该平台还包括一个带有信号处理和机器学习方法的算法库,以促进新的闭环DBS策略的开发。结果:该平台可实现低潜伏期反馈刺激控制,动物实验和临床实验的响应时间分别为6.23±0.85 ms和6.95±1.11 ms。它有效地消除了刺激伪影,并展示了实现新型闭环DBS算法的灵活性。该平台集成了几种典型的闭环协议,包括阈值自适应DBS、调幅DBS、双阈值DBS和神经状态依赖DBS。结论:这项工作为快速部署创新闭环策略在动物和临床研究中的转化研究提供了一种研究工具。该平台在实时数据处理和低延迟控制方面的能力代表了转化DBS研究的重大进步,对开发更有效的治疗干预具有潜在意义。
{"title":"Closed-Loop Deep Brain Stimulation Platform for Translational Research","authors":"Yan Li MEng ,&nbsp;Yingnan Nie PhD ,&nbsp;Xiao Li PhD ,&nbsp;Xi Cheng MCS ,&nbsp;Guanyu Zhu MD ,&nbsp;Jianguo Zhang MD ,&nbsp;Zhaoyu Quan PhD ,&nbsp;Shouyan Wang PhD","doi":"10.1016/j.neurom.2024.10.012","DOIUrl":"10.1016/j.neurom.2024.10.012","url":null,"abstract":"<div><h3>Objective</h3><div>This study aims to facilitate the translation of innovative closed-loop deep brain stimulation (DBS) strategies from theory to practice by establishing a research platform. The platform addresses the challenges of real-time stimulation artifact removal, low-latency feedback stimulation, and rapid translation from animal to clinical experiments.</div></div><div><h3>Materials and Methods</h3><div>The platform comprises hardware for neural sensing and stimulation, a closed-loop software framework for real-time data streaming and computation, and an algorithm library for implementing closed-loop DBS strategies. The platform integrates hardware for both animal and clinical research. The closed-loop software framework handles the entire closed-loop stimulation, including data streaming, stimulation artifact removal, preprocessing, a closed-loop stimulation strategy, and stimulation control. It provides a unified programming interface for both C/C++ and Python, enabling secondary development to integrate new closed-loop stimulation strategies. Additionally, the platform includes an algorithm library with signal processing and machine learning methods to facilitate the development of new closed-loop DBS strategies.</div></div><div><h3>Results</h3><div>The platform can achieve low-latency feedback stimulation control with response times of 6.23 ± 0.85 ms and 6.95 ± 1.11 ms for animal and clinical experiments, respectively. It effectively removed stimulation artifacts and demonstrated flexibility in implementing new closed-loop DBS algorithms. The platform has integrated several typical closed-loop protocols, including threshold-adaptive DBS, amplitude-modulation DBS, dual-threshold DBS and neural state–dependent DBS.</div></div><div><h3>Conclusions</h3><div>This work provides a research tool for rapidly deploying innovative closed-loop strategies for translational research in both animal and clinical studies. The platform’s capabilities in real-time data processing and low-latency control represent a significant advancement in translational DBS research, with potential implications for the development of more effective therapeutic interventions.</div></div>","PeriodicalId":19152,"journal":{"name":"Neuromodulation","volume":"28 3","pages":"Pages 464-471"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142828726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Delay- and Pressure-Dependent Neuromodulatory Effects of Transcranial Ultrasound Stimulation
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2025.01.004
Cyril Atkinson-Clement PhD , Mohammad Alkhawashki MSc , Marilyn Gatica PhD , Stefanos Alexandros Kontogouris MSc , Marcus Kaiser PhD

Objective

Despite the growing interest in transcranial focused ultrasound stimulation (TUS), our understanding of its underlying mechanisms remains limited. In this study, we aimed to investigate the effects of TUS on several functional magnetic resonance imaging metrics by considering their latency, duration, and relationship with applied acoustic pressure.

Materials and methods

We recruited 22 healthy volunteers and used a pre- vs post-TUS protocol. Half of the volunteers were stimulated in the right inferior frontal cortex and the other half in the right thalamus. The fractional amplitudes of low-frequency fluctuations, regional homogeneity, degree centrality, local functional connectivity density, and eigenvector centrality were considered. These metrics were compared before TUS and at three different time points in the first hour after TUS.

Results

Our results showed that 1) TUS primarily alters functional connectivity metrics at both the local and global levels; 2) stronger alterations are observed when the delay after TUS increases and 3) when the applied acoustic pressure is close to the maximum.

Conclusion

These results suggest that some consequences of TUS might not be immediate, inviting us to revise the premise that TUS consequences are immediate and will progressively disappear.
{"title":"Delay- and Pressure-Dependent Neuromodulatory Effects of Transcranial Ultrasound Stimulation","authors":"Cyril Atkinson-Clement PhD ,&nbsp;Mohammad Alkhawashki MSc ,&nbsp;Marilyn Gatica PhD ,&nbsp;Stefanos Alexandros Kontogouris MSc ,&nbsp;Marcus Kaiser PhD","doi":"10.1016/j.neurom.2025.01.004","DOIUrl":"10.1016/j.neurom.2025.01.004","url":null,"abstract":"<div><h3>Objective</h3><div>Despite the growing interest in transcranial focused ultrasound stimulation (TUS), our understanding of its underlying mechanisms remains limited. In this study, we aimed to investigate the effects of TUS on several functional magnetic resonance imaging metrics by considering their latency, duration, and relationship with applied acoustic pressure.</div></div><div><h3>Materials and methods</h3><div>We recruited 22 healthy volunteers and used a pre- vs post-TUS protocol. Half of the volunteers were stimulated in the right inferior frontal cortex and the other half in the right thalamus. The fractional amplitudes of low-frequency fluctuations, regional homogeneity, degree centrality, local functional connectivity density, and eigenvector centrality were considered. These metrics were compared before TUS and at three different time points in the first hour after TUS.</div></div><div><h3>Results</h3><div>Our results showed that 1) TUS primarily alters functional connectivity metrics at both the local and global levels; 2) stronger alterations are observed when the delay after TUS increases and 3) when the applied acoustic pressure is close to the maximum.</div></div><div><h3>Conclusion</h3><div>These results suggest that some consequences of TUS might not be immediate, inviting us to revise the premise that TUS consequences are immediate and will progressively disappear.</div></div>","PeriodicalId":19152,"journal":{"name":"Neuromodulation","volume":"28 3","pages":"Pages 444-454"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143365046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Timing Matters: Preconditioning Effects of Cathodal Transcranial Direct Current Stimulation on Intermittent Theta-Burst Stimulation-Induced Neuroplasticity in the Primary Motor Cortex
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2025.01.006
Wenjun Dai MSc , Yishu Zhang BSc , Yihui Cheng MSc , Manyu Dong BSc , Yilun Qian BSc , Xinyue Wang BSc , Chuan Guo MSc , Hanjun Liu PhD , Ying Shen PhD

Background

Recent advances have highlighted the interplay between intermittent theta-burst stimulation (iTBS) and transcranial direct current stimulation (tDCS) in neuroplasticity modulation. However, the synergistic potential of these modalities in optimizing plasticity, particularly with cathodal tDCS preconditioning before iTBS, remains poorly understood.

Objective

This study examined the effects of cathodal high-definition tDCS (HD-tDCS) preconditioning on iTBS-induced neuroplasticity in the primary motor cortex at different timing intervals.

Materials and Methods

Twenty healthy participants underwent four stimulation sessions in a randomized cross-over design, receiving iTBS either immediately or at 10-minute and 30-minute intervals after cathodal HD-tDCS preconditioning, in addition to a control session with iTBS immediately after sham HD-tDCS. Motor evoked potentials (MEPs) were measured at baseline and 5, 10, 15, and 30 minutes after iTBS to assess changes in neuroplasticity. Each session was separated by ≥one week to prevent carry-over effects.

Results

Compared with sham sessions, immediate cathodal HD-tDCS preconditioning significantly enhanced MEPs across all measured intervals after iTBS, with sustained neuroplasticity persisting for up to 30 minutes. Immediate preconditioning produced significant MEP enhancements at 5 and 10 minutes when compared with the 30-minute delayed condition.

Conclusions

The effectiveness of cathodal tDCS preconditioning in enhancing iTBS-induced neuroplasticity decreased with increasing intervals between tDCS and iTBS application. These findings highlight the essential role of precise timing in tDCS preconditioning for maximizing the neuroplastic effects of iTBS and offer valuable insights for optimizing neurorehabilitation protocols.
{"title":"Timing Matters: Preconditioning Effects of Cathodal Transcranial Direct Current Stimulation on Intermittent Theta-Burst Stimulation-Induced Neuroplasticity in the Primary Motor Cortex","authors":"Wenjun Dai MSc ,&nbsp;Yishu Zhang BSc ,&nbsp;Yihui Cheng MSc ,&nbsp;Manyu Dong BSc ,&nbsp;Yilun Qian BSc ,&nbsp;Xinyue Wang BSc ,&nbsp;Chuan Guo MSc ,&nbsp;Hanjun Liu PhD ,&nbsp;Ying Shen PhD","doi":"10.1016/j.neurom.2025.01.006","DOIUrl":"10.1016/j.neurom.2025.01.006","url":null,"abstract":"<div><h3>Background</h3><div>Recent advances have highlighted the interplay between intermittent theta-burst stimulation (iTBS) and transcranial direct current stimulation (tDCS) in neuroplasticity modulation. However, the synergistic potential of these modalities in optimizing plasticity, particularly with cathodal tDCS preconditioning before iTBS, remains poorly understood.</div></div><div><h3>Objective</h3><div>This study examined the effects of cathodal high-definition tDCS (HD-tDCS) preconditioning on iTBS-induced neuroplasticity in the primary motor cortex at different timing intervals.</div></div><div><h3>Materials and Methods</h3><div>Twenty healthy participants underwent four stimulation sessions in a randomized cross-over design, receiving iTBS either immediately or at 10-minute and 30-minute intervals after cathodal HD-tDCS preconditioning, in addition to a control session with iTBS immediately after sham HD-tDCS. Motor evoked potentials (MEPs) were measured at baseline and 5, 10, 15, and 30 minutes after iTBS to assess changes in neuroplasticity. Each session was separated by ≥one week to prevent carry-over effects.</div></div><div><h3>Results</h3><div>Compared with sham sessions, immediate cathodal HD-tDCS preconditioning significantly enhanced MEPs across all measured intervals after iTBS, with sustained neuroplasticity persisting for up to 30 minutes. Immediate preconditioning produced significant MEP enhancements at 5 and 10 minutes when compared with the 30-minute delayed condition.</div></div><div><h3>Conclusions</h3><div>The effectiveness of cathodal tDCS preconditioning in enhancing iTBS-induced neuroplasticity decreased with increasing intervals between tDCS and iTBS application. These findings highlight the essential role of precise timing in tDCS preconditioning for maximizing the neuroplastic effects of iTBS and offer valuable insights for optimizing neurorehabilitation protocols.</div></div>","PeriodicalId":19152,"journal":{"name":"Neuromodulation","volume":"28 3","pages":"Pages 520-531"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143449686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
2025 Calendar of Events - April
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/S1094-7159(25)00040-6
{"title":"2025 Calendar of Events - April","authors":"","doi":"10.1016/S1094-7159(25)00040-6","DOIUrl":"10.1016/S1094-7159(25)00040-6","url":null,"abstract":"","PeriodicalId":19152,"journal":{"name":"Neuromodulation","volume":"28 3","pages":"Page 549"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tipu Zahed Aziz, MD (November 9, 1956–October 25, 2024) Tipu Zahed Aziz,医学博士(1956年11月9日- 2024年10月25日)。
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.12.003
Sean C. Martin DPhil , James J. FitzGerald PhD
{"title":"Tipu Zahed Aziz, MD (November 9, 1956–October 25, 2024)","authors":"Sean C. Martin DPhil ,&nbsp;James J. FitzGerald PhD","doi":"10.1016/j.neurom.2024.12.003","DOIUrl":"10.1016/j.neurom.2024.12.003","url":null,"abstract":"","PeriodicalId":19152,"journal":{"name":"Neuromodulation","volume":"28 3","pages":"Pages 371-372"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neuromodulation and Disorders of Consciousness: Systematic Review and Pathophysiology 神经调节与意识障碍:系统回顾与病理生理学》。
IF 3.2 3区 医学 Q2 CLINICAL NEUROLOGY Pub Date : 2025-04-01 DOI: 10.1016/j.neurom.2024.09.003
Rajeev R. Dutta BS , Sheila Abdolmanafi AS , Alex Rabizadeh BS , Rounak Baghbaninogourani BS , Shirin Mansooridara MD , Alexander Lopez MD, MS , Yama Akbari MD, PhD , Michelle Paff MD

Introduction

Disorders of consciousness (DoC) represent a range of clinical states, affect hundreds of thousands of people in the United States, and have relatively poor outcomes. With few effective pharmacotherapies, neuromodulation has been investigated as an alternative for treating DoC. To summarize the available evidence, a systematic review of studies using various forms of neuromodulation to treat DoC was conducted.

Materials and Methods

Adhering to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines for systematic literature review, the PubMed, Scopus, and Web of Science databases were queried to identify articles published between 1990 and 2023 in which neuromodulation was used, usually in conjunction with pharmacologic intervention, to treat or reverse DoC in humans and animals. Records were excluded if DoC (eg, unresponsive wakefulness syndrome, minimally conscious state, etc) were not the primary clinical target.

Results

A total of 69 studies (58 human, 11 animal) met the inclusion criteria for the systematic review, resulting in over 1000 patients and 150 animals studied in total. Most human studies investigated deep brain stimulation (n = 15), usually of the central thalamus, and transcranial magnetic stimulation (n = 18). Transcranial direct-current stimulation (n = 15) and spinal cord stimulation (n = 6) of the dorsal column also were represented. A few studies investigated low-intensity focused ultrasound (n = 2) and median nerve stimulation (n = 2). Animal studies included primate and murine models, with nine studies involving deep brain stimulation, one using ultrasound, and one using transcranial magnetic stimulation.

Discussion

While clinical outcomes were mixed and possibly confounded by natural recovery or pharmacologic interventions, deep brain stimulation appeared to facilitate greater improvements in DoC than other modalities. However, repetitive transcranial magnetic stimulation also demonstrated clinical potential with much lower invasiveness.
导言:意识障碍(DoC)代表了一系列临床状态,影响着美国数十万人,而且治疗效果相对较差。由于有效的药物疗法很少,神经调节已被研究作为治疗意识障碍的替代疗法。为了总结现有证据,我们对使用各种形式的神经调控治疗 DoC 的研究进行了系统性回顾:根据系统性文献综述的 PRISMA(系统性综述和荟萃分析的首选报告项目)指南,查询了 PubMed、Scopus 和 Web of Science 数据库,以确定 1990 年至 2023 年间发表的文章,这些文章通常结合药物干预使用神经调控来治疗或逆转人类和动物的 DoC。如果DoC(如无反应清醒综合征、微意识状态等)不是主要的临床目标,则排除记录:共有 69 项研究(58 项人类研究,11 项动物研究)符合系统综述的纳入标准,共研究了 1000 多名患者和 150 多只动物。大多数人类研究调查了脑深部刺激(15 项),通常是丘脑中部刺激和经颅磁刺激(18 项)。此外,还有经颅直流电刺激(15 人)和脊髓背柱刺激(6 人)。少数研究调查了低强度聚焦超声(n = 2)和正中神经刺激(n = 2)。动物研究包括灵长类动物和小鼠模型,其中九项研究涉及脑深部刺激,一项使用超声波,一项使用经颅磁刺激:讨论:虽然临床结果参差不齐,并可能受到自然恢复或药物干预的影响,但与其他方式相比,深部脑刺激似乎更有助于改善DoC。然而,重复经颅磁刺激也显示出了临床潜力,而且侵入性更低。
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引用次数: 0
期刊
Neuromodulation
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