Clinical Neurophysiology最新文献

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Functional connectivity anomalies in medication-naive children with ADHD: Diagnostic potential, symptoms interpretation, and a mediation model 未接受药物治疗的ADHD儿童的功能连接异常:诊断潜力、症状解释和中介模型
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-18 DOI: 10.1016/j.clinph.2025.04.011
Yingzi Hu , Yexian Zeng , Tong Fu , Danping Hong , Han Yang , Zhihang Zhu , Daomeng Cheng , Caiping Dang , Yan Song , Chanjuan Yang , Weizhen Yin , Yanling Zhou
{"title":"Functional connectivity anomalies in medication-naive children with ADHD: Diagnostic potential, symptoms interpretation, and a mediation model","authors":"Yingzi Hu ,&nbsp;Yexian Zeng ,&nbsp;Tong Fu ,&nbsp;Danping Hong ,&nbsp;Han Yang ,&nbsp;Zhihang Zhu ,&nbsp;Daomeng Cheng ,&nbsp;Caiping Dang ,&nbsp;Yan Song ,&nbsp;Chanjuan Yang ,&nbsp;Weizhen Yin ,&nbsp;Yanling Zhou","doi":"10.1016/j.clinph.2025.04.011","DOIUrl":"10.1016/j.clinph.2025.04.011","url":null,"abstract":"<div><h3>Objective</h3><div>To identify reliable electroencephalography (EEG) biomarkers for attention deficit/hyperactivity disorder (ADHD) by investigating anomalous functional connectivity patterns and their clinical relevance.</div></div><div><h3>Methods</h3><div>Resting-state EEG data were collected from 74 children aged 6–12 (33 unmedicated ADHD; 41 typically developing). Functional connectivity was quantified using the imaginary part of coherency (ICOH). Machine learning (ML)-based support vector machine (SVM) modeling, regression, and mediation analyses linked connectivity features to symptom severity and diagnostic classification.</div></div><div><h3>Results</h3><div>Children with ADHD exhibited beta (β) band hypo-connectivity in frontal regions (Fp2-F4, Fp1-Cz, F7-Cz) and theta (θ) band hyper-connectivity in left parietal-central networks (C3-P7, P3-P7, etc.). An SVM classifier achieved an average area under the curve of 0.89 using three connectivity features. Left parietal θ band hyper-connectivity (C3-P7) correlated with both inattention and hyperactivity/impulsivity and mediated their interrelationship.</div></div><div><h3>Conclusions</h3><div>ADHD is characterized by disrupted frontoparietal connectivity, with θ band hyper-connectivity in sensory-integration networks potentially compensating for impaired frontal regulation.</div></div><div><h3>Significance</h3><div>These findings highlight C3-P7 θ band connectivity as both a diagnostic and mechanistic biomarker, providing novel target for neurofeedback therapies and enhancing the differential diagnosis in neurodevelopmental disorders.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 212-219"},"PeriodicalIF":3.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886304","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
Electrodiagnostic characteristics of neuromuscular disease in paediatric intensive care 小儿重症监护中神经肌肉疾病的电诊断特点
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-17 DOI: 10.1016/j.clinph.2025.04.005
Laura Nastasi , Amjad Aldrees , Daniyal Motan , Sheba Azam , Matthew Pitt , Gerald Cooray , Jacquie Deeb
{"title":"Electrodiagnostic characteristics of neuromuscular disease in paediatric intensive care","authors":"Laura Nastasi ,&nbsp;Amjad Aldrees ,&nbsp;Daniyal Motan ,&nbsp;Sheba Azam ,&nbsp;Matthew Pitt ,&nbsp;Gerald Cooray ,&nbsp;Jacquie Deeb","doi":"10.1016/j.clinph.2025.04.005","DOIUrl":"10.1016/j.clinph.2025.04.005","url":null,"abstract":"<div><h3>Objective</h3><div>Assessing peripheral electrodiagnostic (EDX) tests in paediatric intensive care.</div></div><div><h3>Methods</h3><div>Data from patients who had undergone EDX test/s between 2010 and 2019 at a tertiary centre were retrospectively analysed, including final neuromuscular diagnoses, EDX results and demographic information. EDX data included motor and sensory nerve conduction study, needle electromyography (EMG), repetitive nerve stimulation and stimulated single fiber EMG. Final clinical diagnosis was based on several investigations including muscle biopsy, MR imaging, gene testing, EDX-tests and clinical phenotype.</div></div><div><h3>Results</h3><div>351 patients were identified (56 % male, average age 42.5 months), with diagnoses categorised into the following groups: no identifiable neuromuscular disorders (45 %), neuropathy (13 %), motor neuron disease (9 %), isolated bulbar palsy (6 %), myopathy (14 %), neuromuscular junction disorders (5 %), and critical illness neuromyopathy (8 %). EDX data was stratified into 7 electrodiagnostic categories: normal, neuropathy, motor neuron disease, isolated bulbar palsy, myopathy, neuromuscular junction disorders, and critical illness neuromyopathy. With this stratification we were able to predict the final diagnosis with acceptable accuracy.</div></div><div><h3>Conclusion</h3><div>The prevalence of neuromuscular disease groups in paediatric ICU was defined together with their corresponding EDX characteristics.</div></div><div><h3>Significance</h3><div>The study confirms the utility of electrophysiology as a valuable tool for diagnosing and managing neuromuscular conditions in paediatric ICU.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 123-130"},"PeriodicalIF":3.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859039","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
Deep learning-based EEG source imaging is robust under varying electrode configurations 基于深度学习的脑电源成像在不同电极配置下具有鲁棒性
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-16 DOI: 10.1016/j.clinph.2025.04.009
Jesse Rong , Rui Sun , Boney Joseph , Greg Worrell , Bin He
{"title":"Deep learning-based EEG source imaging is robust under varying electrode configurations","authors":"Jesse Rong ,&nbsp;Rui Sun ,&nbsp;Boney Joseph ,&nbsp;Greg Worrell ,&nbsp;Bin He","doi":"10.1016/j.clinph.2025.04.009","DOIUrl":"10.1016/j.clinph.2025.04.009","url":null,"abstract":"<div><h3>Objectives</h3><div>Previous research has underscored the necessity of high-density EEG for accurate and reliable EEG source imaging (ESI) results with conventional ESI methods, limiting their utility in clinical settings with only low-density EEG available. In recent years, deep learning-based ESI methods have exhibited robust performance by directly learning spatiotemporal brain activity patterns from data.</div></div><div><h3>Methods</h3><div>This study investigates the impact of EEG electrode number on a newly proposed Deep Learning-based Source Imaging Framework (DeepSIF). Through computer simulations and clinical data analysis, we assess ESI performance across various channel configurations (16, 21, 32, 64, and 75 channels) comparing DeepSIF and conventional methods against the simulated ground truth and clinical reference regions.</div></div><div><h3>Results</h3><div>Our results indicate that DeepSIF consistently delivers accurate source localization and extent estimations across different channel counts and noise levels, surpassing conventional methods. In a cohort of 27 drug-resistant epilepsy patients, the average spatial dispersions for DeepSIF, sLORETA and LCMV are 7.9/9.0 mm, 21.9/28.1 mm, and 20.0/28.9 mm, respectively when using 75/16 electrodes.</div></div><div><h3>Conclusions</h3><div>Our results indicate the robust performance of DeepSIF algorithm for source imaging with low-density EEG.</div></div><div><h3>Significance</h3><div>Our findings suggest broad applications of the deep-learning based source imaging in clinical settings without the need for high-density EEG devices.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"175 ","pages":"Article 2010730"},"PeriodicalIF":3.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895820","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
Subclinical involvement of small hand muscles in early amyotrophic lateral sclerosis: Selective susceptibility leads to ‘split hand’ phenomenon 早期肌萎缩性侧索硬化症的亚临床累及手部肌肉:选择性易感性导致“裂手”现象
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-14 DOI: 10.1016/j.clinph.2025.04.007
Mamede de Carvalho , Miguel Oliveira Santos , Michael Swash
{"title":"Subclinical involvement of small hand muscles in early amyotrophic lateral sclerosis: Selective susceptibility leads to ‘split hand’ phenomenon","authors":"Mamede de Carvalho ,&nbsp;Miguel Oliveira Santos ,&nbsp;Michael Swash","doi":"10.1016/j.clinph.2025.04.007","DOIUrl":"10.1016/j.clinph.2025.04.007","url":null,"abstract":"<div><h3>Objectives</h3><div>Split-hand phenomenon is common in patients with amyotrophic lateral sclerosis (ALS), but it is unknown if first dorsal interosseous (FDI) and abductor pollicis brevis (ABP) are affected earlier than abductor digiti minimi (ADM). We aimed to address this issue.</div></div><div><h3>Methods</h3><div>One clinically normal hand from ALS patients was investigated, including needle EMG of the FDI, motor amplitude, distal latency, F-waves, neurophysiological index (NI) and split-hand index (SHI). Hands were categorised as G1 (normal FDI) and G2 (FDI with neurogenic changes). In patients who agreed EMG of the 3 muscles was done. A subset of G1 patients underwent a second evaluation 4–5 months later.</div></div><div><h3>Results</h3><div>We studied 133 patients; EMG of the 3 muscles was done in 77 patients. There was no evidence for an earlier loss of motor units in FDI/ABP. In G2 patients, CMAP amplitude and NI were significantly lower (p &lt; 0.001), but ADM changes were minor. Reassessment of G1 patients confirmed significant SHI, and amplitude and NI decrease in all muscles, but F-waves frequency remained stable in ADM.</div></div><div><h3>Conclusions</h3><div>Loss of motor units in the 3 hand muscles began in parallel, but ADM spinal motoneurons showed stronger resistance to degeneration.</div></div><div><h3>Significance</h3><div>Dysfunction of intrinsic spinal circuits can influence split-hand phenomenon.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 173-177"},"PeriodicalIF":3.7,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863487","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
Towards early diagnosis of amyotrophic lateral sclerosis using near fibre EMG 肌萎缩性侧索硬化症近纤维肌电图的早期诊断
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-14 DOI: 10.1016/j.clinph.2025.04.006
Oscar Garnés-Camarena , Ignacio Mahíllo-Fernández , Pedro Martínez-Ulloa , Ross Mandeville , Oscar Lorenzo , Daniel W. Stashuk
{"title":"Towards early diagnosis of amyotrophic lateral sclerosis using near fibre EMG","authors":"Oscar Garnés-Camarena ,&nbsp;Ignacio Mahíllo-Fernández ,&nbsp;Pedro Martínez-Ulloa ,&nbsp;Ross Mandeville ,&nbsp;Oscar Lorenzo ,&nbsp;Daniel W. Stashuk","doi":"10.1016/j.clinph.2025.04.006","DOIUrl":"10.1016/j.clinph.2025.04.006","url":null,"abstract":"<div><h3>Objective</h3><div>Amyotrophic lateral sclerosis (ALS) is characterized by progressive loss of motor neurons and diagnosis is usually delayed several months. The continuous denervation and reinnervation associated with ALS are manifest in EMG signals as changes in motor unit potential (MUP) size, temporal dispersion and instability. Near Fibre EMG is a novel method to assess early changes in MUP temporal dispersion and instability using routinely recorded EMG signals in a semi-automated manner.</div></div><div><h3>Methods</h3><div>Near Fibre EMG values from 2318 MUs, retrospectively sampled at the time of ALS diagnosis, from 96 muscles of 15 patients were compared with values from 3954 MUs sampled from 109 muscles of 84 reference subjects.</div></div><div><h3>Results</h3><div>30.1% and 46.1% of ALS MUs had MUPs with increased complexity or instability, respectively, and 17.4% had both. The potential importance and heightened sensitivity of NFEMG was highlighted when analyzing normal-sized motor units; as many as 24% of the normal-sized MUPs actually had significant instability, while 14% had increased complexity, and 7.4% had both.</div></div><div><h3>Conclusions</h3><div>Near Fibre EMG can characterize motor unit electrophysiological status and hence help quantify the degree, and course of denervation and reinnervation.</div></div><div><h3>Significance</h3><div>Near-Fiber EMG offers the potential to facilitate earlier ALS diagnosis, which, as promising therapies become available, can be consequential.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 114-122"},"PeriodicalIF":3.7,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859136","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
Diagnostic utility of threshold tracking TMS paradigms in early amyotrophic lateral sclerosis 阈值追踪TMS模式在早期肌萎缩性侧索硬化症中的诊断价值
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-12 DOI: 10.1016/j.clinph.2025.03.044
Aicee Dawn Calma , Nathan Pavey , Cláudia Santos Silva , Mehdi A.J. van den Bos , Con Yiannikas , Michelle A. Farrar , Matthew C Kiernan , Parvathi Menon , Steve Vucic
{"title":"Diagnostic utility of threshold tracking TMS paradigms in early amyotrophic lateral sclerosis","authors":"Aicee Dawn Calma ,&nbsp;Nathan Pavey ,&nbsp;Cláudia Santos Silva ,&nbsp;Mehdi A.J. van den Bos ,&nbsp;Con Yiannikas ,&nbsp;Michelle A. Farrar ,&nbsp;Matthew C Kiernan ,&nbsp;Parvathi Menon ,&nbsp;Steve Vucic","doi":"10.1016/j.clinph.2025.03.044","DOIUrl":"10.1016/j.clinph.2025.03.044","url":null,"abstract":"<div><h3>Objective</h3><div>Threshold tracking transcranial magnetic stimulation (TMS) has exhibited utility as a diagnostic technique in Amyotrophic Lateral Sclerosis (ALS). Different threshold tracking paradigms have recently been proposed. The present study assessed the diagnostic utility of serial ascending and parallel threshold tracking TMS in ALS.</div></div><div><h3>Methods</h3><div>Threshold tracking TMS was undertaken on 90 prospectively recruited participants suspected of ALS. Short interval intracortical inhibition (SICI) was recorded with serial ascending and parallel threshold tracking paradigms between Interstimulus Interval (ISI) 1-to-7 ms. The primary outcome measure was differences in diagnostic utility of the paradigms in differentiating ALS from ALS mimicking disorders using receiver operating characteristic (ROC) analysis (DeLong statistical method).</div></div><div><h3>Results</h3><div>Reduction in SICI reliably differentiated ALS from mimic disorders, irrespective of the threshold tracking paradigm. Comparison of area under the curve (AUC) established a significantly higher value for mean SICI (1–7 ms) with the serial ascending SICI paradigm (0.81, 95 % confidence interval 0.72–0.91) compared to the parallel paradigm (SICI 0.72, 95 % confidence interval 0.61–0.83, p = 0.0065). The better diagnostic utility of serial ascending paradigm was evident for SICI recorded between 1-to-5 ms, and was maintained irrespective of disease onset site, degree of functional impairment, and the degree of lower motor neuron dysfunction. A comparable diagnostic utility across threshold tracking paradigms was evident in ALS participants who presented with a relative paucity of upper motor neuron signs.</div></div><div><h3>Conclusion</h3><div>While threshold tracking TMS reliably differentiated ALS from mimic disorders, the present study established better diagnostic utility with the serial ascending threshold tracking TMS paradigm.</div></div><div><h3>Significance</h3><div>The serial ascending threshold tracking TMS should be used in a clinical setting as a diagnostic tool for ALS.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 105-113"},"PeriodicalIF":3.7,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844181","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
Electrophysiological hemispheric asymmetries induced by parietal stimulation eliciting visual percepts 由顶叶刺激引起视觉知觉引起的电生理半球不对称
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-11 DOI: 10.1016/j.clinph.2025.03.041
D. Bonfanti , E. Bertacco , L.C. Parra , C. Mazzi , S. Savazzi
{"title":"Electrophysiological hemispheric asymmetries induced by parietal stimulation eliciting visual percepts","authors":"D. Bonfanti ,&nbsp;E. Bertacco ,&nbsp;L.C. Parra ,&nbsp;C. Mazzi ,&nbsp;S. Savazzi","doi":"10.1016/j.clinph.2025.03.041","DOIUrl":"10.1016/j.clinph.2025.03.041","url":null,"abstract":"<div><h3>Objective</h3><div>We aimed to establish if the electrophysiological activity resulting from the direct stimulation of the intraparietal sulcus and eliciting visual percepts is hemispheric-specific.</div></div><div><h3>Methods</h3><div>We tested nineteen participants. Each received 360 TMS pulses at phosphene threshold intensity over right and left IPS while recording EEG. After each pulse, participants had to report if they had seen a phosphene.</div></div><div><h3>Results</h3><div>Parietal phosphene perception is associated with hemispheric-specific activations: phosphenes elicited by left TMS involve central and frontal electrodes at about 30 ms, and frontal, central and parieto-occipital electrodes from 120 to 250 ms; phosphenes elicited by right parietal TMS involve parietal and centro-parietal electrodes at about 60 ms, and frontal, central and parietal electrodes from 150 to 250 ms. Correlated Component Analysis shows that primary visual areas are not activated when phosphenes are produced by TMS over IPS.</div></div><div><h3>Conclusions</h3><div>Our results show that direct stimulation of IPS gives rise to sustained patterns of activity specific to the stimulated hemisphere. Moreover, elicited parietal phosphenes are associated with evoked activity specific to the stimulated hemisphere and located outside early visual processing areas.</div></div><div><h3>Significance</h3><div>This study highlights hemispheric differences in the electrophysiological dynamics related to parietal phosphenes, and shows that the dorsal pathway can give rise to visual conscious percepts.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 131-147"},"PeriodicalIF":3.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859040","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
50 Hz-Repetitive transcranial magnetic stimulation modulates brain connectivity in Parkinson’s disease 50赫兹-重复经颅磁刺激调节帕金森病的大脑连通性
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-10 DOI: 10.1016/j.clinph.2025.02.368
J.M. Pignat , A. Patelli , F.R. Herrmann , E. Kaarna , A. Joutsen , M. Hallett , D.H. Benninger
{"title":"50 Hz-Repetitive transcranial magnetic stimulation modulates brain connectivity in Parkinson’s disease","authors":"J.M. Pignat ,&nbsp;A. Patelli ,&nbsp;F.R. Herrmann ,&nbsp;E. Kaarna ,&nbsp;A. Joutsen ,&nbsp;M. Hallett ,&nbsp;D.H. Benninger","doi":"10.1016/j.clinph.2025.02.368","DOIUrl":"10.1016/j.clinph.2025.02.368","url":null,"abstract":"<div><h3>Objectives</h3><div>High-frequency repetitive transcranial magnetic stimulation (rTMS) may modulate neuronal excitability and promote the presumed “pro-kinetic” gamma frequency, while attenuating the “anti-kinetic” beta frequency. This study explores whether 50 Hz-rTMS and intermittent Theta Burst Stimulation (iTBS), of the primary motor (M1) and dorsolateral prefrontal cortex (DLPFC) enhance the gamma activity and functional connectivity within the motor circuit in Parkinson’s disease (PD).</div></div><div><h3>Methods</h3><div>We investigated pre- and post-rTMS interventional EEG in 62 PD patients following 50 Hz-rTMS and iTBS. Power spectral analysis, along with coherence and mutual information embedded in metrics of graph theory, was applied to assess the functional connectivity across the whole brain.</div></div><div><h3>Results</h3><div>We found changes in the cluster coefficient and local efficiency of gamma activity in the left M1 following iTBS, and wider-spread changes within the sensorimotor circuit following 50 Hz-rTMS. We found no changes in the power spectrum or entrainment of the gamma activity in the motor cortex or beyond.</div></div><div><h3>Conclusion</h3><div>The current 50 Hz-rTMS protocols modulate functional connectivity in PD patients, but not the power spectrum. These topological changes do not translate into clinical effects. These stimulation protocols may lack the specificity to be clinically effective.</div></div><div><h3>Significance</h3><div>High frequency rTMS provides new insights in brain connectivity in the gamma bandwidth.</div></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 96-104"},"PeriodicalIF":3.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829629","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
Calcium-dependent nonlinearity describes the after-effects of different patterns of theta-burst TMS. 钙依赖性非线性描述了不同模式的脉冲经颅磁刺激的后效。
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-10 DOI: 10.1016/j.clinph.2025.04.001
Ke Ma, Sung Wook Chung, John C Rothwell, Masashi Hamada, Stephan M Goetz
{"title":"Calcium-dependent nonlinearity describes the after-effects of different patterns of theta-burst TMS.","authors":"Ke Ma, Sung Wook Chung, John C Rothwell, Masashi Hamada, Stephan M Goetz","doi":"10.1016/j.clinph.2025.04.001","DOIUrl":"https://doi.org/10.1016/j.clinph.2025.04.001","url":null,"abstract":"<p><strong>Objective: </strong>Optimisation of transcranial magnetic stimulation protocol parameters can potentially improve their efficacy through theoretical mathematical models. This study aims to develop an elaborate but still parsimonious quantitative model for understanding the dosage-dependency of Theta-Burst Stimulation (TBS).</p><p><strong>Methods: </strong>We propose a calcium-dependent nonlinear model that uses Michaelis-Menten kinetics to represent competing molecular pathways in postsynaptic neurons during TBS intervention. The model integrates four subsystems: calcium dynamics, modulation substances, MEP learning, and metaplasticity, with a particular focus on the interaction between facilitatory and inhibitory signalling cascades.</p><p><strong>Results: </strong>Our model successfully reproduces experimental findings from various TBS protocols, including the reversal of after-effects observed in prolonged stimulation. The simulation results suggest that the competing molecular pathways with distinct calcium sensitivities and temporal dynamics determine the direction of after-effects.</p><p><strong>Conclusions: </strong>This proposed model represents a substantial advancement in understanding TBS-induced neuromodulation by providing testable predictions for untested TBS protocols and offers complementary insights into the underlying neural mechanisms.</p><p><strong>Significance: </strong>This model offers a basic framework for potentially incorporating complex, nonlinear relationships between TBS parameters and after-effects under various neurological and psychiatric conditions. It also provides a valuable tool for later protocol optimisation and guiding future experimental designs.</p>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":" ","pages":"2010713"},"PeriodicalIF":3.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143984626","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
Letter to the Editor: Ephatic transmission impairs trigemino-cervical reflex monitoring during microvascular decompression surgery for hemifacial spasm 致编辑的信:面肌痉挛微血管减压手术中,膈肌传播损害三叉-颈反射监测
IF 3.7 3区 医学
Clinical Neurophysiology Pub Date : 2025-04-09 DOI: 10.1016/j.clinph.2025.03.039
Denise Lima Medeiros de Melo , Dayanne Rodrigues da Cunha Alves Bento Oliveira , Denise Spinola Pinheiro , Gilberto Mastrocola Manzano
{"title":"Letter to the Editor: Ephatic transmission impairs trigemino-cervical reflex monitoring during microvascular decompression surgery for hemifacial spasm","authors":"Denise Lima Medeiros de Melo ,&nbsp;Dayanne Rodrigues da Cunha Alves Bento Oliveira ,&nbsp;Denise Spinola Pinheiro ,&nbsp;Gilberto Mastrocola Manzano","doi":"10.1016/j.clinph.2025.03.039","DOIUrl":"10.1016/j.clinph.2025.03.039","url":null,"abstract":"","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":"174 ","pages":"Pages 59-60"},"PeriodicalIF":3.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817767","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
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