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Movement-Related Cortical Evoked Potentials Using Four-Limb Imagery

A. Sano, H. Bakardjian
2009 International Journal of Neuroscience  
We compared the electroencephalographic changes during actual and imaginary movements with four limbs and classified optimally the responses during four-limb imagery.  ...  Evoked potentials in imagery exhibited lower and delayed peaks compared to actual-movement responses, but activations in the primary and the supplementary motor area were similar.  ...  Our objectives were (1) to compare the EEG responses before, during, and after actual and imaginary movements to clarify the cortical activation differences in the actual and imaginary limb movements,  ... 
doi:10.1080/00207450802325561 pmid:19283591 fatcat:fbhcp3gvprh3tpoldwg7co73k4

EEG Source Analysis [chapter]

Marco Congedo, Leslie Sherlin
2011 Neurofeedback and Neuromodulation Techniques and Applications  
In this chapter we investigate BSS theory and we provide a general conceptual framework and algorithm (AJDC) to deal with all major kinds of EEG data, namely, spontaneous, induced and evoked EEG.  ...  Finally, the chapter includes a short introduction to the physiology and physics of EEG, yielding the definition of the EEG sensor measurement, which is the starting point of all EEG data analysis, including  ...  These two sources were localized as a right parietal component with gamma activation and a right medial-temporal-parietal component with activation in theta and gamma bandwidths.  ... 
doi:10.1016/b978-0-12-382235-2.00002-0 fatcat:4to7kmjd4rcj3lfv2qwhkgpjui

Event-Related EEG Time-Frequency Analysis: An Overview of Measures and An Analysis of Early Gamma Band Phase Locking in Schizophrenia

B. J. Roach, D. H. Mathalon
2008 Schizophrenia Bulletin  
their synchronization, particularly in the gamma band.  ...  Time-frequency analysis comprises many methods and measures that capture different aspects of EEG magnitude and phase relationships.  ...  This is followed by an analysis that directly compares healthy controls and patients with schizophrenia on this gamma band response.  ... 
doi:10.1093/schbul/sbn093 pmid:18684772 pmcid:PMC2632478 fatcat:2lnfxl75qfgazp2l3575laqrce

Power Spectrum and Connectivity Analysis in EEG Recording during Attention and Creativity Performance in Children

Diego M. Mateos, Gabriela Krumm, Vanessa Arán Filippetti, Marisel Gutierrez
2022 NeuroSci  
Conversely, during CREA task, power spectrum analysis showed a significant increase in the delta, beta, theta, and gamma bands.  ...  Our results indicated that, during d2 Test performance there was an increase in global gamma phase synchronization and there was a global alpha and theta band desynchronization.  ...  Thus, our data help to enhance knowledge of the role of gamma activity during CP in children under different conditions and analysis methods.  ... 
doi:10.3390/neurosci3020025 fatcat:vg7xgxqbpjblzl5sxivtqqfssi

Saccades and pre-saccadic stimulus repetition alter cortical network topology and dynamics: evidence from EEG and graph theoretical analysis [article]

Amir Hossein Ghaderi, Matthias Niemeier, John Douglas Crawford
2021 bioRxiv   pre-print
(theta) and supramarginal gyrus (gamma).  ...  Source localization (saccade minus fixation) identified bilateral dorsomedial frontoparietal activity across frequency bands, whereas stimulus repetition produced band-specific modulations in left prefrontal  ...  Based on previous EEG/MEG studies (Jerbi et al., 2009; Kovalenko & Busch, 2016; McLelland et al., 2016) , we analyzed EEG sources in various frequency bands (i.e., theta, alpha, beta, and gamma bands)  ... 
doi:10.1101/2021.06.08.447611 fatcat:ofmj6v7jabedtbt6bnpdmowfni

International Federation of Clinical Neurophysiology (IFCN) – EEG research workgroup: Recommendations on frequency and topographic analysis of resting state EEG rhythms. Part 1: Applications in clinical research studies

Claudio Babiloni, Robert J. Barry, Erol Başar, Katarzyna J. Blinowska, Andrzej Cichocki, Wilhelmus H.I.M. Drinkenburg, Wolfgang Klimesch, Robert T. Knight, Fernando Lopes da Silva, Paul Nunez, Robert Oostenveld, Jaeseung Jeong (+3 others)
2019 Clinical Neurophysiology  
In 1999, the International Federation of Clinical Neurophysiology (IFCN) published "IFCN Guidelines for topographic and frequency analysis of EEGs and EPs" (Nuwer et al., 1999).  ...  ); (4) extraction of "synchronization" features based on frequency analysis (band-pass filtering and computation of rsEEG amplitude/power density spectrum); (5) extraction of "connectivity" features based  ...  Until the end of their life, they had been working for the development of EEG science and its application in Clinical Neurophysiology.  ... 
doi:10.1016/j.clinph.2019.06.234 pmid:31501011 fatcat:psp6t4czorbsndn4gp5m4o3elu

Motor Imagination of Lower Limb Movements at Different Frequencies

Yingtao Liu, Chao Chen, Abdelkader Nasreddine Belkacem, Zhiyong Wang, Longlong Cheng, Chun Wang, Yuexiao Chang, Penghai Li, Liang Zou
2021 Journal of Healthcare Engineering  
Motor imagination (MI) is the mental process of only imagining an action without an actual movement.  ...  analyses of EEG rhythm characteristics, and used quantitative indicators, such as ERD mean value and recognition rate.  ...  For the analysis of the recognition rate of the EEG signals induced by HFMI and LFMI more straightforwardly, the 8-30 Hz band EEG signals with the significant ERD phenomenon are selected in this study.  ... 
doi:10.1155/2021/4073739 pmid:34976324 pmcid:PMC8716247 fatcat:mui6fiufm5dppiwkwehv6cpowq

Comatose Patients After Cardiopulmonary Resuscitation: An Analysis Based on Quantitative Methods of EEG Reactivity

Huijin Huang, Yingying Su, Zikang Niu, Gang Liu, Xiaoli Li, Mengdi Jiang
2022 Frontiers in Neurology  
group had stronger gamma and beta connectivity in nearly the whole brain, but weaker theta and delta connectivity in some brain regions (e.g., the frontal-occipital lobe and parietal-occipital lobe) than  ...  Using a 64-electrode electroencephalography (EEG) wireless 64A system, EEG signals were recorded from 16 comatose patients after CPR in the acute phase (<1 month) from 2019 to 2020.  ...  30 Hz) and gamma (γ: 30-45 Hz).  ... 
doi:10.3389/fneur.2022.877406 pmid:35720067 pmcid:PMC9205205 fatcat:2lc3g6cdefcqvbvrxgqirunycu

Classification for Memory Activities: Experiments and EEG Analysis Based on Networks Constructed via Phase-Locking Value

Jing Xi, Xiao-Lin Huang, Xing-Yan Dang, Bin-Bin Ge, Ying Chen, Yun Ge, Yunfeng Wu
2022 Computational and Mathematical Methods in Medicine  
Particularly, PLV application was restricted to the narrow-band signals, and rare successful application to EEG Gamma rhythm, defined as wide as 30-100 Hz, had been reported.  ...  Combined with behavioral data analysis, we segmented EEG into slices; then, we calculated phase-locking value (PLV) of Gamma rhythms between every two leads, conducted binarization, constructed brain function  ...  Acknowledgments We thank Mingming Cao, Shirong Wu, and Jianjun Zhuang for the help in equipment manipulation and thank Fangfang Long for advices of behavioral experiment design.  ... 
doi:10.1155/2022/3878771 pmid:35799656 pmcid:PMC9256324 fatcat:m3d5shf4hjhondsgsp6ys3nnzu

Decoding Individual Finger Movements from One Hand Using Human EEG Signals

Ke Liao, Ran Xiao, Jania Gonzalez, Lei Ding, Wang Zhan
2014 PLoS ONE  
Phenomena of broadband power increase and low-frequency-band power decrease were observed in EEG in the present study, when EEG power spectra were decomposed by a principal component analysis (PCA).  ...  The present study suggests the similar movement-related spectral changes in EEG as in ECoG, and demonstrates the feasibility of discriminating finger movements from one hand using EEG.  ...  Miller and Dr. Gerwin Schalk for data providing of BCI Competition IV data set 4.  ... 
doi:10.1371/journal.pone.0085192 pmid:24416360 pmcid:PMC3885680 fatcat:eppcwfrzijajxos2gv3ugkbysy

Competitive interactions in sensorimotor cortex: oscillations express separation between alternative movement targets

Tineke Grent-'t-Jong, Robert Oostenveld, Ole Jensen, W. Pieter Medendorp, Peter Praamstra
2014 Journal of Neurophysiology  
This nonlinear pattern was evident in slow event-related fields as well as in beta-and lowgamma-band suppression.  ...  We interpret the late delay effects in terms of increased movement-preparatory activity when there is greater overlap and hence less competition between groups of neurons encoding two response alternatives  ...  Praamstra and W. P. Medendorp. W. P. Medendorp is also supported by the European Research Council (EU-ERC 283567) and NWO-VICI (453-11-001).  ... 
doi:10.1152/jn.00127.2014 pmid:24760786 pmcid:PMC4064405 fatcat:2bxzixzorrfidgot3ppxex7mje

Sensitivity of amplitude and phase based MEG measures of interhemispheric connectivity during unilateral finger movements

Hsi T. Wei, Alex Francois-Nienaber, Tiffany Deschamps, Buddhika Bellana, Melissa Hebscher, Gayatri Sivaratnam, Maryam Bagherzadeh, Jed A. Meltzer
2021 NeuroImage  
Between M1s during unilateral movements, we found that phase-based metrics were effective at revealing connectivity during the beta (15-35 Hz) rebound period linked to movement termination, but not during  ...  the early period of beta desynchronization occurring during the movement itself.  ...  Most analysis was performed using commercial MEG software from CTF, and academic freeware as cited.  ... 
doi:10.1016/j.neuroimage.2021.118457 pmid:34363959 fatcat:d4chu3bd7zaxdocnny4zxxffly

Prediction of Cognitive Task Activations via Resting-state Functional Connectivity Networks: an EEG Study

Luyao Wang, Jian Zhang, Tiantian Liu, Duanduan Chen, Dikun Yang, Ritsu Go, Jinglong Wu, Tianyi Yan
2020 IEEE Transactions on Cognitive and Developmental Systems  
Significance: Changes in neural activity across resting and task states on a sub-second time scale can be detected by EEG, which is helpful for understanding the underlying mechanisms of illness and therapeutic  ...  Methods: In this study, we focused on electroencephalography (EEG) data because its high time resolution allowed us to study processing both overall and in detail.  ...  (A) Activation predicted by resting-state (open eyes) PLI FC networks (left) and actual activation. (B) Power distribution of all frequency bands for predicted and actual spectral power.  ... 
doi:10.1109/tcds.2020.3031604 fatcat:qq4m7i5jend3zb4nkjo7rdythi

Beta Oscillations in Working Memory, Executive Control of Movement and Thought, and Sensorimotor Function

Robert Schmidt, Maria Herrojo Ruiz, Bjørg E. Kilavik, Mikael Lundqvist, Philip A Starr, Adam R. Aron
2019 Journal of Neuroscience  
Beta oscillations (∼13 to 30 Hz) have been observed during many perceptual, cognitive, and motor processes in a plethora of brain recording studies.  ...  A similar "clear-out" function might apply during the stopping of action and the stopping of long-term memory retrieval (stopping thoughts), where increased prefrontal beta is also observed.  ...  During encoding, brief gamma bursts were associated with spiking activity while beta bursts were reduced.  ... 
doi:10.1523/jneurosci.1163-19.2019 pmid:31619492 pmcid:PMC6794925 fatcat:iw4nhclrsvfati7ujehiyypibu

Electrical Spinal Stimulation, and Imagining of Lower Limb Movements to Modulate Brain-Spinal Connectomes That Control Locomotor-Like Behavior

Yury Gerasimenko, Dimitry Sayenko, Parag Gad, Justin Kozesnik, Tatiana Moshonkina, Aleksandr Grishin, Aleksandr Pukhov, Sergey Moiseev, Ruslan Gorodnichev, Victor Selionov, Inessa Kozlovskaya, V. Reggie Edgerton
2018 Frontiers in Physiology  
Color topographic EEG maps of the brain for each of the frequency bands (Delta1 0.5-2 Hz, Delta2 2-4 Hz, Theta 4-8 Hz, Alpha 8-13 Hz, Beta 13-24 Hz, and Gamma 24-35 Hz) have been used.  ...  However, there are some brain structures which are active during actual movements but not active during imagining movements.  ...  Supplementary Video 1 | Video demonstrating effects of TSCS only and VIS+TSCS in 6 subjects tested in the gravity neutral device.  ... 
doi:10.3389/fphys.2018.01196 pmid:30283341 pmcid:PMC6157483 fatcat:lu76clhgmnejzd7odvttodcifq
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