421 Hits in 5.9 sec

Editorial: Electromyography (EMG) Techniques for the Assessment and Rehabilitation of Motor Impairment Following Stroke

Cliff S. Klein, Sheng Li, Xiaogang Hu, Xiaoyan Li
2018 Frontiers in Neurology  
Finally, one group addressed coupling between the electroencephalogram (EEG) and EMG signals during upper limb movements.  ...  These included one study that addressed coupling between the index finger and thumb, whereas another addressed upper limb synergies during reaching.  ...  A wavelet-based time-frequency analysis approach was used to quantify activation changes of multiple ankle muscles in chronic stroke survivors.  ... 
doi:10.3389/fneur.2018.01122 pmid:30619073 pmcid:PMC6305436 fatcat:ek3sifg4bzchdovgmhoreem7r4

Corticomuscular Coherence and Its Applications: A Review

Jinbiao Liu, Yixuan Sheng, Honghai Liu
2019 Frontiers in Human Neuroscience  
Corticomuscular coherence (CMC) is an index utilized to indicate coherence between brain motor cortex and associated body muscles, conventionally.  ...  As an index of functional connections between the cortex and muscles, CMC research is the focus of neurophysiology in recent years.  ...  Functional corticomuscular connection during reaching is weakened following stroke. Clin.  ... 
doi:10.3389/fnhum.2019.00100 pmid:30949041 pmcid:PMC6435838 fatcat:ltmis3f52revnhnoestokykyxq

Reducing the Impact of Shoulder Abduction Loading on the Classification of Hand Opening and Grasping in Individuals with Poststroke Flexion Synergy

Yiyun Lan, Jun Yao, Julius P. A. Dewald
2017 Frontiers in Bioengineering and Biotechnology  
upper extremity movement such as reach-to-grasp.  ...  In this study, we proposed a novel approach to classify hand opening and grasping in the context of the flexion synergy using a wavelet coherence-based filter.  ...  The increased alpha-band coherence during hand grasping while lifting the arm in the stroke individual suggested a greater level of shared neural drive to both muscles.  ... 
doi:10.3389/fbioe.2017.00039 pmid:28713811 pmcid:PMC5491847 fatcat:qvdh7hxod5fntkn3yqmla72kii

Phase synchronization analysis of prefrontal tissue oxyhemoglobin oscillations in elderly subjects with cerebral infarction

Qingyu Han, Zengyong Li, Yuanjin Gao, Wenhao Li, Qing Xin, Qitao Tan, Manyu Zhang, Yixun Zhang
2014 Medical Physics (Lancaster)  
ACKNOWLEDGMENT This project was supported by the National Natural Science Foundation of China (Grant Nos. 31371002 and 81071223).  ...  wavelet-based phase coherence analysis.  ...  To help reduce movement artifact, the volunteers were asked to avoid sudden movements during the measurement. 2.C.  ... 
doi:10.1118/1.4896113 pmid:25281981 fatcat:h2n4rlf5cbewxkakad6s34voea

Combined Use of EMG and EEG Techniques for Neuromotor Assessment in Rehabilitative Applications: A Systematic Review

Cristina Brambilla, Ileana Pirovano, Robert Mihai Mira, Giovanna Rizzo, Alessandro Scano, Alfonso Mastropietro
2021 Sensors  
Non-specific processing methods such as EEG-EMG coherence are used to provide combined EEG/EMG signal analysis, but rarely both signals are analyzed using state-of-the-art techniques that are gold-standard  ...  in each of the two domains.  ...  Conflicts of Interest: The authors declare no conflict of interest. Sensors 2021, 21, 7014  ... 
doi:10.3390/s21217014 pmid:34770320 pmcid:PMC8588321 fatcat:jfp5ng4idrapbgvnp4wzpaebdi

Electroencephalogram–Electromyography Coupling Analysis in Stroke Based on Symbolic Transfer Entropy

Yunyuan Gao, Leilei Ren, Rihui Li, Yingchun Zhang
2018 Frontiers in Neurology  
In addition, the strongest EEG-EMG coupling strength was observed in the beta frequency band (15-35 Hz) during the upper limb movement.  ...  In this study, to overcome the limitation of losing the characteristics of signals in conventional time series symbolization methods, a variable scale symbolic transfer entropy (VS-STE) analysis approach  ...  It can be used to estimate the functional coupling strength and information transfer direction between cortices and muscles and to reveal movement control and response mechanisms during movements (15)  ... 
doi:10.3389/fneur.2017.00716 pmid:29354091 pmcid:PMC5758532 fatcat:lx2gax6hxfg77mezm4zqhwssa4

Increased inspiratory resistance affects the dynamic relationship between blood pressure changes and subarachnoid space width oscillations

Magdalena Wszedybyl-Winklewska, Jacek Wolf, Ewa Swierblewska, Katarzyna Kunicka, Kamila Mazur, Marcin Gruszecki, Pawel J. Winklewski, Andrzej F. Frydrychowski, Leszek Bieniaszewski, Krzysztof Narkiewicz, Marek Czosnyka
2017 PLoS ONE  
Changes in SAS were recorded with a new method i.e. near-infrared transillumination/backscattering sounding. Wavelet transform analysis was used to assess the BP and SAS oscillations coupling.  ...  to a controlled, increased inspiratory resistance which results in marked potentiation of the intrathoracic negative pressure).  ...  Wieslawa Kucharska for excellent technical support, and to express our gratitude to all volunteers who agreed to participate in the study.  ... 
doi:10.1371/journal.pone.0179503 pmid:28654638 pmcid:PMC5487010 fatcat:6nwl3toc7zf3lltpcy7gnjktzq

Parietofrontal network upregulation after motor stroke

M. Bönstrup, R. Schulz, G. Schön, B. Cheng, J. Feldheim, G. Thomalla, C. Gerloff
2018 NeuroImage: Clinical  
Whereas motor network coupling generally increased during the task in both groups, the task-related coherence between the parietal and primary motor cortex in the stroke lesioned hemisphere showed increased  ...  Interpretation: These results demonstrate that parietofrontal motor system integration during visually guided movements is stronger in the stroke-lesioned brain.  ...  Acknowledgements This work was supported by the German Research Foundation (SFB 936 C1 to CG, C2 to GT) and German National Academy of Sciences Leopoldina (Fellowship programme grant number 57243032 to  ... 
doi:10.1016/j.nicl.2018.03.006 pmid:29876261 pmcid:PMC5987870 fatcat:unhvnq64jvhgfbwvryctstc2sm

Multiscale Information Transfer in Functional Corticomuscular Coupling Estimation Following Stroke: A Pilot Study

Xiaoling Chen, Ping Xie, Yuanyuan Zhang, Yuling Chen, Fangmei Yang, Litai Zhang, Xiaoli Li
2018 Frontiers in Neurology  
Recently, functional corticomuscular coupling (FCMC) between the cortex and the contralateral muscle has been used to evaluate motor function after stroke.  ...  However, previous studies in FCMC for stroke patients mainly focused on the coupling strength in singletime scale, without considering the changes of the inherently directional and multiscale properties  ...  The functional corticomuscular coupling (FCMC) between the motor cortex and the effector muscles is considered essential for effective movement control (2) .  ... 
doi:10.3389/fneur.2018.00287 pmid:29765351 pmcid:PMC5938354 fatcat:aa6s2nhsprcghby27lokhzl6tm

Neuromechanical Biomarkers for Robotic Neurorehabilitation

Florencia Garro, Michela Chiappalone, Stefano Buccelli, Lorenzo De Michieli, Marianna Semprini
2021 Frontiers in Neurorobotics  
In addition, other parameters linked to the motor learning and brain plasticity occurring during the rehabilitation have been explored, looking for a more holistic rehabilitation approach.  ...  However, the majority of the research done in this area is still exploratory.  ...  ACKNOWLEDGMENTS The authors gracefully acknowledge Silvia Chiappalone for providing the graphics of Figure 2 .  ... 
doi:10.3389/fnbot.2021.742163 pmid:34776920 pmcid:PMC8579108 fatcat:2zosr2jawfddldei65fmidjh7q

Identifying bidirectional total and non-linear information flow in functional corticomuscular coupling during a dorsiflexion task: a pilot study

Tie Liang, Qingyu Zhang, Xiaoguang Liu, Bin Dong, Xiuling Liu, Hongrui Wang
2021 Journal of NeuroEngineering and Rehabilitation  
We then used the TDMIC method to study the characteristics of total and nonlinear information flow in FCMC during a dorsiflexion task for healthy controls and stroke patients.  ...  There is no significant difference in the direction of beta- and gamma-band information flow in stroke group.  ...  Acknowledgements The authors would like to acknowledge the participation of all subjects in this study. The authors would also like to thank Qian Zang for her contribution to the statistical analysis.  ... 
doi:10.1186/s12984-021-00872-w pmid:33947410 fatcat:76ipy2ci35genn7ijan5cxaqbi

Tremor: From Pathogenesis to Treatment

Giuliana Grimaldi, Mario Manto
2008 Synthesis Lectures on Biomedical Engineering  
Coherence analysis of EMG of forearm muscles and EEG of contralateral motor cortex showed strong cortico-and intermuscular coherence in the 8-to 30-Hz range, indicating a pathological cortical drive in  ...  Wavelet analysis can be combined with neural network analysis. This is out of the scope of this book.  ...  Long-term follow-up of a group of 158 patients (diagnosis: PD, ET, tremor due to stroke, encephalitis, or cerebral trauma) who underwent MRI-guided radiosurgical nucleus ventralis intermedius (Vim) thalamotomy  ... 
doi:10.2200/s00129ed1v01y200807bme020 fatcat:vboo54vkffbg3kw7stxjlrvmo4

Modulation of Gamma and Theta Spectral Amplitude and Phase Synchronization Is Associated with the Development of Visuo-Motor Learning

B. Perfetti, C. Moisello, E. C. Landsness, S. Kvint, S. Lanzafame, M. Onofrj, A. Di Rocco, G. Tononi, M. F. Ghilardi
2011 Journal of Neuroscience  
We found that initial learning is associated with enhancement of gamma power in a right parietal region during movement execution as well as gamma/theta phase coherence during movement planning.  ...  Specifically, we propose that gamma/theta phase coupling plays a pivotal role in the integration of a new representation into motor memories.  ...  phase coupling increased during movement planning.  ... 
doi:10.1523/jneurosci.1319-11.2011 pmid:21994398 pmcid:PMC3206224 fatcat:qakxzigqlrbphekjtqqnosm3am

Changes in cortical activity measured with EEG during a high-intensity cycling exercise

Hendrik Enders, Filomeno Cortese, Christian Maurer, Jennifer Baltich, Andrea B. Protzner, Benno M. Nigg
2016 Journal of Neurophysiology  
Changes in cortical activity measured with EEG during a high-intensity cycling exercise.  ...  A time-frequency analysis of the identified electrocortical clusters was performed to investigate the magnitude and timing of event-related spectral perturbations.  ...  ACKNOWLEDGMENTS We thank Jessi Temple for the data collection and supervision of the exercise physiology portion of the study protocol, as well as Elias Tomaras for technical assistance.  ... 
doi:10.1152/jn.00497.2015 pmid:26538604 pmcid:PMC4760484 fatcat:q2wzjqm67ngwpokiy6x4ryxl5i

Intervention-Induced Changes in Cortical Connectivity and Activity in Severe Chronic Hemiparetic Stroke [article]

Kevin B Wilkins, Julius P.A. Dewald, Jun Yao
2019 bioRxiv   pre-print
Conclusions: Changes in coupling within or between motor regions during movement preparation complement topographical activity changes at movement execution.  ...  We quantified changes in focal cortical activity at movement execution and connectivity during movement preparation.  ...  Importantly, stroke individuals show less decreases in beta during movement compared to controls 71 , and persistence of inhibition in ipsilesional M1 during movement preparation 72 .  ... 
doi:10.1101/547083 fatcat:yklufkbjtbaarf6phqwvprv4ta
« Previous Showing results 1 — 15 out of 421 results