Pub Date : 2024-07-09DOI: 10.1016/j.clinph.2024.06.018
Objective
Memory processes known to be impaired in Alzheimer’s disease (AD) are maintained by a large-scale neurocognitive network with subcortical components, including the thalamus. Therefore, we aimed to examine the volumetric and functional changes of the thalamic nuclei at different scales across AD stages.
Methods
MRI data of patients diagnosed with 20 AD dementia (ADD), 30 amnestic mild cognitive impairment (MCI), and 30 subjective cognitive impairment (SCI) were used. Volumetric and functional connectivity analyzes were performed by dividing the thalamus into anterior, medial, posterior, lateral and intralaminar nucleus groups and their specific subnuclei.
Results
In the course of AD, the volume of the medial group nuclei, especially the mediodorsal medial magnocellular (MDm) nucleus, decreases. Medial group nuclei and MDm functional connectivity with frontal areas were decreased both in ADD and MCI compared to SCI group, while both of them increased their functional connectivity with visual areas in the ADD group compared to the MCI group.
Conclusions
Our study suggests that the medial group of the thalamus, and specifically the MDm, may be affected in AD.
Significance
Specific thalamic nuclei may be a critical anatomical region for investigating structural and functional changes in AD.
目的已知阿尔茨海默病（AD）中受损的记忆过程是由包括丘脑在内的皮层下成分组成的大规模神经认知网络维持的。因此，我们旨在研究丘脑核团在 AD 不同阶段不同尺度上的体积和功能变化。方法我们使用了 20 例 AD 痴呆（ADD）、30 例失忆性轻度认知障碍（MCI）和 30 例主观认知障碍（SCI）患者的 MRI 数据。通过将丘脑分为前核、内侧核、后核、外侧核和椎板内侧核群及其特定亚核，对丘脑的体积和功能连接性进行了分析。结论我们的研究表明，丘脑内侧核团，特别是 MDm，可能在 AD 中受到影响。意义特定丘脑核团可能是研究 AD 结构和功能变化的关键解剖区域。
{"title":"Volumetric and functional connectivity changes of the thalamic nuclei in different stages of Alzheimer’s disease","authors":"","doi":"10.1016/j.clinph.2024.06.018","DOIUrl":"10.1016/j.clinph.2024.06.018","url":null,"abstract":"<div><h3>Objective</h3><p>Memory processes known to be impaired in Alzheimer’s disease (AD) are maintained by a large-scale neurocognitive network with subcortical components, including the thalamus. Therefore, we aimed to examine the volumetric and functional changes of the thalamic nuclei at different scales across AD stages.</p></div><div><h3>Methods</h3><p>MRI data of patients diagnosed with 20 AD dementia (ADD), 30 amnestic mild cognitive impairment (MCI), and 30 subjective cognitive impairment (SCI) were used. Volumetric and functional connectivity analyzes were performed by dividing the thalamus into anterior, medial, posterior, lateral and intralaminar nucleus groups and their specific subnuclei.</p></div><div><h3>Results</h3><p>In the course of AD, the volume of the medial group nuclei, especially the mediodorsal medial magnocellular (MDm) nucleus, decreases. Medial group nuclei and MDm functional connectivity with frontal areas were decreased both in ADD and MCI compared to SCI group, while both of them increased their functional connectivity with visual areas in the ADD group compared to the MCI group.</p></div><div><h3>Conclusions</h3><p>Our study suggests that the medial group of the thalamus, and specifically the MDm, may be affected in AD.</p></div><div><h3>Significance</h3><p>Specific thalamic nuclei may be a critical anatomical region for investigating structural and functional changes in AD.</p></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141638653","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}
Pub Date : 2024-07-09DOI: 10.1016/j.clinph.2024.06.016
{"title":"Significance of small sharp spikes in mesial temporal lobe epilepsy","authors":"","doi":"10.1016/j.clinph.2024.06.016","DOIUrl":"10.1016/j.clinph.2024.06.016","url":null,"abstract":"","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141716511","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}
Pub Date : 2024-07-09DOI: 10.1016/j.clinph.2024.07.003
{"title":"Non-cephalic electrodes are not inactive in terms of EEG activity","authors":"","doi":"10.1016/j.clinph.2024.07.003","DOIUrl":"10.1016/j.clinph.2024.07.003","url":null,"abstract":"","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141638654","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}
Pub Date : 2024-07-09DOI: 10.1016/j.clinph.2024.07.002
{"title":"Premotor cortex involvement in faciobrachial dystonic seizures: A contribution from MEG-EMG study in a case of anti-LGI1 encephalitis","authors":"","doi":"10.1016/j.clinph.2024.07.002","DOIUrl":"10.1016/j.clinph.2024.07.002","url":null,"abstract":"","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141693474","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}
Pub Date : 2024-07-02DOI: 10.1016/j.clinph.2024.06.010
J.J. Halford, G. Campobello, B.H. Brinkmann, M. Stead, S. Rampp, J. Rémi, K.B. Nilsen, J. Dauwels, M. Galanti, B.C. Dean, S. Winkler, J.A. Ehrenberg, J. Pfaff, G.J. Sullivan
{"title":"Letter to the Editor: Announcement of a Call for Proposals for biomedical waveform coding","authors":"J.J. Halford, G. Campobello, B.H. Brinkmann, M. Stead, S. Rampp, J. Rémi, K.B. Nilsen, J. Dauwels, M. Galanti, B.C. Dean, S. Winkler, J.A. Ehrenberg, J. Pfaff, G.J. Sullivan","doi":"10.1016/j.clinph.2024.06.010","DOIUrl":"https://doi.org/10.1016/j.clinph.2024.06.010","url":null,"abstract":"","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582386","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}
Pub Date : 2024-06-29DOI: 10.1016/j.clinph.2024.06.013
Yu Yin , Xiaofan Qiu , Lisha Nie , Fuqin Wang , Xinyu Luo , Chunfeng Zhao , Haoyue Yu , Dan Luo , Jinhui Wang , Heng Liu
Objective
To investigate the local cortical morphology and individual-based morphological brain networks (MBNs) changes in children with Rolandic epilepsy (RE).
Methods
Based on the structural MRI data of 56 children with RE and 56 healthy controls (HC), we constructed four types of individual-based MBNs using morphological indices (cortical thickness [CT], fractal dimension [FD], gyrification index [GI], and sulcal depth [SD]). The global and nodal properties of the brain networks were analyzed using graph theory. The between-group difference in local morphology and network topology was estimated, and partial correlation analysis was further analyzed.
Results
Compared with the HC, children with RE showed regional GI increases in the right posterior cingulate gyrus and SD increases in the right anterior cingulate gyrus and medial prefrontal cortex. Regarding the network level, RE exhibited increased characteristic path length in CT-based and FD-based networks, while decreased FD-based network node efficiency in the right inferior frontal gyrus. No significant correlation between altered morphological features and clinical variables was found in RE.
Conclusions
These findings indicated that children with RE have disrupted morphological brain network organization beyond local morphology changes.
Significance
The present study could provide more theoretical basis for exploring the neuropathological mechanisms in RE.
{"title":"Individual-based morphological brain network changes in children with Rolandic epilepsy","authors":"Yu Yin , Xiaofan Qiu , Lisha Nie , Fuqin Wang , Xinyu Luo , Chunfeng Zhao , Haoyue Yu , Dan Luo , Jinhui Wang , Heng Liu","doi":"10.1016/j.clinph.2024.06.013","DOIUrl":"https://doi.org/10.1016/j.clinph.2024.06.013","url":null,"abstract":"<div><h3>Objective</h3><p>To investigate the local cortical morphology and individual-based morphological brain networks (MBNs) changes in children with Rolandic epilepsy (RE).</p></div><div><h3>Methods</h3><p>Based on the structural MRI data of 56 children with RE and 56 healthy controls (HC), we constructed four types of individual-based MBNs using morphological indices (cortical thickness [CT], fractal dimension [FD], gyrification index [GI], and sulcal depth [SD]). The global and nodal properties of the brain networks were analyzed using graph theory. The between-group difference in local morphology and network topology was estimated, and partial correlation analysis was further analyzed.</p></div><div><h3>Results</h3><p>Compared with the HC, children with RE showed regional GI increases in the right posterior cingulate gyrus and SD increases in the right anterior cingulate gyrus and medial prefrontal cortex. Regarding the network level, RE exhibited increased characteristic path length in CT-based and FD-based networks, while decreased FD-based network node efficiency in the right inferior frontal gyrus. No significant correlation between altered morphological features and clinical variables was found in RE.</p></div><div><h3>Conclusions</h3><p>These findings indicated that children with RE have disrupted morphological brain network organization beyond local morphology changes.</p></div><div><h3>Significance</h3><p>The present study could provide more theoretical basis for exploring the neuropathological mechanisms in RE.</p></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582387","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}
Pub Date : 2024-06-29DOI: 10.1016/j.clinph.2024.06.011
Objective
This study aimed at investigating the effect of median nerve stimulation on ipsilateral cortical potentials evoked by contralateral median nerve electrical stimulation.
Methods
We recorded somatosensory-evoked potentials (SEPs) from the left parietal cortex in 15 right-handed, healthy subjects. We administered bilateral median nerve stimulation, with the ipsilateral stimulation preceding the stimulation on the contralateral by intervals of 5, 10, 20, or 40 ms. We adjusted these intervals based on each individual’s N20 latency. As a measure of S1 excitability, the amplitude of the N20 and the area of the High Frequency Oscillation (HFO) burst were analyzed for each condition.
Results
The results revealed significant inhibition of N20 amplitude by ipsilateral median nerve stimulation at interstimulus intervals (ISIs) between 5 and 40 ms. Late HFO burst was suppressed at short ISIs of 5 and 10 ms, pointing to a transcallosal inhibitory effect on S1 intracortical circuits.
Conclusions
Findings suggest interhemispheric interaction between the primary somatosensory areas, supporting the existence of transcallosal transfer of tactile information.
Significance
This study provides valuable insights into the interhemispheric connections between primary sensory areas and underscore the potential role of interhemispheric interactions in somatosensory processing.
{"title":"Bilateral median nerve stimulation and High-Frequency Oscillations unveil interhemispheric inhibition of primary sensory cortex","authors":"","doi":"10.1016/j.clinph.2024.06.011","DOIUrl":"10.1016/j.clinph.2024.06.011","url":null,"abstract":"<div><h3>Objective</h3><p>This study aimed at investigating the effect of median nerve stimulation on ipsilateral cortical potentials evoked by contralateral median nerve electrical stimulation.</p></div><div><h3>Methods</h3><p>We recorded somatosensory-evoked potentials (SEPs) from the left parietal cortex in 15 right-handed, healthy subjects. We administered bilateral median nerve stimulation, with the ipsilateral stimulation preceding the stimulation on the contralateral by intervals of 5, 10, 20, or 40 ms. We adjusted these intervals based on each individual’s N20 latency. As a measure of S1 excitability, the amplitude of the N20 and the area of the High Frequency Oscillation (HFO) burst were analyzed for each condition.</p></div><div><h3>Results</h3><p>The results revealed significant inhibition of N20 amplitude by ipsilateral median nerve stimulation at interstimulus intervals (ISIs) between 5 and 40 ms. Late HFO burst was suppressed at short ISIs of 5 and 10 ms, pointing to a transcallosal inhibitory effect on S1 intracortical circuits.</p></div><div><h3>Conclusions</h3><p>Findings suggest interhemispheric interaction between the primary somatosensory areas, supporting the existence of transcallosal transfer of tactile information.</p></div><div><h3>Significance</h3><p>This study provides valuable insights into the interhemispheric connections between primary sensory areas and underscore the potential role of interhemispheric interactions in somatosensory processing.</p></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388245724001846/pdfft?md5=a3725f5e8dacc7953f2ce46b7cd86ff1&pid=1-s2.0-S1388245724001846-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141732334","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}
Pub Date : 2024-06-29DOI: 10.1016/j.clinph.2024.06.012
Objective
Video-based eye tracking was used to investigate saccade, pupil, and blink abnormalities among patients with Huntington’s disease (HD) who watched sequences of short videos. HD, an autosomal dominant neurodegenerative disorder resulting from a CAG mutation on chromosome 4, produces motor and cognitive impairments including slow or irregular eye movements, which have been studied using structured tasks.
Methods
To explore how HD affects eye movements under instruction free conditions, we assessed 22 HD patients and their age matched controls in a 10-minute video-based free viewing task.
Results
Patients with HD experienced a significant reduction in saccade exploration rate following video clip transitions, an increase in pupil reactions to luminance changes after clip transitions, and a significant higher blink rate throughout the task compared to the control group.
Conclusions
These results show that HD has a significant impact on how patients visually explore and respond to their environment under unconstrained and ecologically natural conditions.
Significance
Eye tracking in HD patients revealed saccadic, pupil, and blink abnormalities in early HD patients, suggestive of brain circuitry abnormalities that probably involve brain stem deficits. Further research should explore the impact of these changes on the quality of life of the patients affected by the disease.
目的通过基于视频的眼动跟踪研究亨廷顿氏病（HD）患者在观看短视频序列时的眼球运动、瞳孔和眨眼异常。HD是一种常染色体显性神经退行性疾病，由第4号染色体上的CAG突变引起，会产生运动和认知障碍，包括眼球运动缓慢或不规则，这些问题已通过结构化任务进行了研究。方法为了探索HD如何影响无指令条件下的眼球运动，我们对22名HD患者及其年龄匹配的对照组进行了10分钟的视频自由观看任务评估。结果与对照组相比，HD 患者在视频片段转换后的囊状移动探索率明显降低，片段转换后瞳孔对亮度变化的反应增加，整个任务过程中的眨眼率明显升高。这些结果表明，在无限制的生态自然条件下，HD 会对患者的视觉探索和对环境的反应产生重大影响。意义HD 患者的眼球追踪显示，早期 HD 患者的囊回、瞳孔和眨眼异常，提示大脑回路异常，可能涉及脑干缺陷。进一步的研究应探讨这些变化对该病患者生活质量的影响。
{"title":"Saccades, pupil response and blink abnormalities in Huntington’s disease patients during free viewing","authors":"","doi":"10.1016/j.clinph.2024.06.012","DOIUrl":"10.1016/j.clinph.2024.06.012","url":null,"abstract":"<div><h3>Objective</h3><p>Video-based eye tracking was used to investigate saccade, pupil, and blink abnormalities among patients with Huntington’s disease (HD) who watched sequences of short videos. HD, an autosomal dominant neurodegenerative disorder resulting from a CAG mutation on chromosome 4, produces motor and cognitive impairments including slow or irregular eye movements, which have been studied using structured tasks.</p></div><div><h3>Methods</h3><p>To explore how HD affects eye movements under instruction free conditions, we assessed 22 HD patients and their age matched controls in a 10-minute video-based free viewing task.</p></div><div><h3>Results</h3><p>Patients with HD experienced a significant reduction in saccade exploration rate following video clip transitions, an increase in pupil reactions to luminance changes after clip transitions, and a significant higher blink rate throughout the task compared to the control group.</p></div><div><h3>Conclusions</h3><p>These results show that HD has a significant impact on how patients visually explore and respond to their environment under unconstrained and ecologically natural conditions.</p></div><div><h3>Significance</h3><p>Eye tracking in HD patients revealed saccadic, pupil, and blink abnormalities in early HD patients, suggestive of brain circuitry abnormalities that probably involve brain stem deficits. Further research should explore the impact of these changes on the quality of life of the patients affected by the disease.</p></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141622779","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}
Pub Date : 2024-06-29DOI: 10.1016/j.clinph.2024.06.009
Shuyu Li , Shuang Li , Tao Ding , Sijia Liu , Xiuyan Guo , Zhiyuan Liu
Objective
As a prodromal stage to major depressive disorder (MDD), subthreshold depression (StD) has a higher prevalence in the population, resulting in a greater healthcare burden. StD individuals’ current negative emotion could be moderated by attentional deployment. However, it remains unclear whether attentional deployment training can mitigate subsequent negative emotion in StD individuals.
Methods
Based on 160 participants, we combined decision task (Experiment 1, N = 69), eye-tracking (Experiment 2, N = 40), and EEG (Experiment 3, N = 51) techniques to investigate how one-week attentional deployment (gain-focus, GF) training modulated the emotional processing of negative stimulus and its underlying neural correlates in StD individuals.
Results
After one-week GF training, StD individuals significantly reduced the first fixation time and total fixation time on the negative part (missed opportunities) of decision outcome and showed a decrease in emotional sensitivity to missed opportunities. An increase in N1 and decrease in P3 and LPP (late positive potentials) amplitudes, as well as a decrease in alpha oscillation, were observed when StD individuals faced missed opportunities after training. Additionally, the extent of reduction in StD individuals’ emotional sensitivity to missed opportunities could be significantly predicted by the degree of decrease in alpha oscillation.
Conclusion
One-week attentional deployment training could modulate negative emotion in StD individuals and the degree of change in alpha oscillation might act as an objective indicator for the effectiveness of training.
Significance
Our study provides a convenient and effective approach to alleviate the negative emotion of StD individuals.
{"title":"Effects of attentional deployment training for relieving negative emotion in individuals with subthreshold depression","authors":"Shuyu Li , Shuang Li , Tao Ding , Sijia Liu , Xiuyan Guo , Zhiyuan Liu","doi":"10.1016/j.clinph.2024.06.009","DOIUrl":"https://doi.org/10.1016/j.clinph.2024.06.009","url":null,"abstract":"<div><h3>Objective</h3><p>As a prodromal stage to major depressive disorder (MDD), subthreshold depression (StD) has a higher prevalence in the population, resulting in a greater healthcare burden. StD individuals’ current negative emotion could be moderated by attentional deployment. However, it remains unclear whether attentional deployment training can mitigate subsequent negative emotion in StD individuals.</p></div><div><h3>Methods</h3><p>Based on 160 participants, we combined decision task (Experiment 1, <em>N</em> = 69), eye-tracking (Experiment 2, <em>N</em> = 40), and EEG (Experiment 3, <em>N</em> = 51) techniques to investigate how one-week attentional deployment (gain-focus, GF) training modulated the emotional processing of negative stimulus and its underlying neural correlates in StD individuals.</p></div><div><h3>Results</h3><p>After one-week GF training, StD individuals significantly reduced the first fixation time and total fixation time on the negative part (missed opportunities) of decision outcome and showed a decrease in emotional sensitivity to missed opportunities. An increase in N1 and decrease in P3 and LPP (late positive potentials) amplitudes, as well as a decrease in alpha oscillation, were observed when StD individuals faced missed opportunities after training. Additionally, the extent of reduction in StD individuals’ emotional sensitivity to missed opportunities could be significantly predicted by the degree of decrease in alpha oscillation.</p></div><div><h3>Conclusion</h3><p>One-week attentional deployment training could modulate negative emotion in StD individuals and the degree of change in alpha oscillation might act as an objective indicator for the effectiveness of training.</p></div><div><h3>Significance</h3><p>Our study provides a convenient and effective approach to alleviate the negative emotion of StD individuals.</p></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593592","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}
Pub Date : 2024-06-19DOI: 10.1016/j.clinph.2024.06.006
Robin E. Heemels , Sian Ademi , Melina Hehl
Objective
Investigating the optimal interstimulus interval (ISI) and the 24-hour test–retest reliability for intrahemispheric dorsal premotor cortex (PMd) – primary motor cortex (M1) connectivity using dual-site transcranial magnetic stimulation (dsTMS).
Methods
In 21 right-handed adults, left intrahemispheric PMd–M1 connectivity has been investigated with a stacked-coil dsTMS setup (conditioning stimulus: 75% of resting motor threshold; test stimulus: eliciting MEPs of 1–1.5 mV) at ISIs of 3, 5–8, and 10 ms. Additionally, M1–M1 short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF) were investigated to assess comparability to standard paired-pulse setups.
Results
Conditioning PMd led to significant inhibition of M1 output at ISIs of 3 and 5 ms, whereas 10 ms resulted in facilitation (all, p < 0.001), with a fair test–retest reliability for 3 (ICC: 0.47) and 6 ms (ICC: 0.44) ISIs. Replication of SICI (p < 0.001) and ICF (p = 0.017) was successful, with excellent test–retest reliability for SICI (ICC: 0.81).
Conclusion
This dsTMS setup can probe the inhibitory and facilitatory PMd–M1 connections, as well as reliably replicate SICI and ICF paradigms.
Significance
The stacked-coil dsTMS setup for investigating intrahemispheric PMd–M1 connectivity offers promising possibilities to better understand motor control.
{"title":"Test-retest reliability of intrahemispheric dorsal premotor and primary motor cortex dual-site TMS connectivity measures","authors":"Robin E. Heemels , Sian Ademi , Melina Hehl","doi":"10.1016/j.clinph.2024.06.006","DOIUrl":"10.1016/j.clinph.2024.06.006","url":null,"abstract":"<div><h3>Objective</h3><p>Investigating the optimal interstimulus interval (ISI) and the 24-hour test–retest reliability for intrahemispheric dorsal premotor cortex (PMd) – primary motor cortex (M1) connectivity using dual-site transcranial magnetic stimulation (dsTMS).</p></div><div><h3>Methods</h3><p>In 21 right-handed adults, left intrahemispheric PMd–M1 connectivity has been investigated with a stacked-coil dsTMS setup (conditioning stimulus: 75% of resting motor threshold; test stimulus: eliciting MEPs of 1–1.5 mV) at ISIs of 3, 5–8, and 10 ms. Additionally, M1–M1 short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF) were investigated to assess comparability to standard paired-pulse setups.</p></div><div><h3>Results</h3><p>Conditioning PMd led to significant inhibition of M1 output at ISIs of 3 and 5 ms, whereas 10 ms resulted in facilitation (all, p < 0.001), with a fair test–retest reliability for 3 (ICC: 0.47) and 6 ms (ICC: 0.44) ISIs. Replication of SICI (p < 0.001) and ICF (p = 0.017) was successful, with excellent test–retest reliability for SICI (ICC: 0.81).</p></div><div><h3>Conclusion</h3><p>This dsTMS setup can probe the inhibitory and facilitatory PMd–M1 connections, as well as reliably replicate SICI and ICF paradigms.</p></div><div><h3>Significance</h3><p>The stacked-coil dsTMS setup for investigating intrahemispheric PMd–M1 connectivity offers promising possibilities to better understand motor control.</p></div>","PeriodicalId":10671,"journal":{"name":"Clinical Neurophysiology","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497361","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号