The Change of Brain Activity Under Lower Body Negative Pressure Condition Examined by Time-Frequency Analysis of EEG Signals

2021 ◽  
pp. 632-637
Author(s):  
Yang Liao ◽  
Zhanghuang Chen ◽  
Yuyang Zhu ◽  
Yishuang Zhang ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Negative Pressure ◽  
Lower Body Negative Pressure ◽  
Brain Activity ◽  
Lower Body ◽  
Pressure Condition ◽  
Eeg Signals ◽  
Time Frequency Analysis ◽  
Time Frequency

scholarly journals Time‐Frequency Analysis of Hemodynamics Oscillations during Presyncopal Lower Body Negative Pressure (LBNP)

2021 ◽  
Vol 35 (S1) ◽  
Author(s):  
Garen Anderson ◽  
Alexander Rosenberg ◽  
Victoria Kay ◽  
Haley Barnes ◽  
Justin Sprick ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Negative Pressure ◽  
Lower Body Negative Pressure ◽  
Lower Body ◽  
Time Frequency Analysis ◽  
Time Frequency

Chapter 65 Time-frequency analysis of sensorial brain activity

2002 ◽  
pp. 443-450 ◽  
Author(s):  
Osvaldo A. Rosso ◽  
Juliana Yordanova ◽  
Vasil Kolev ◽  
Susana Blanco ◽  
Alejandra Figliola ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Brain Activity ◽  
Time Frequency Analysis ◽  
Time Frequency

scholarly journals Multivariate time–frequency analysis of electromagnetic brain activity during bimanual motor learning

NeuroImage ◽  
2007 ◽  
Vol 36 (2) ◽  
pp. 370-377 ◽  
Author(s):  
Tjeerd W. Boonstra ◽  
Andreas Daffertshofer ◽  
Michael Breakspear ◽  
Peter J. Beek
Keyword(s):  
Motor Learning ◽  
Frequency Analysis ◽  
Brain Activity ◽  
Time Frequency Analysis ◽  
Time Frequency

scholarly journals Oscillatory Brain Activity in the Time Frequency Domain Associated to Change Blindness and Change Detection Awareness

2012 ◽  
Vol 24 (2) ◽  
pp. 337-350 ◽  
Author(s):  
Álvaro Darriba ◽  
Paula Pazo-Álvarez ◽  
Almudena Capilla ◽  
Elena Amenedo
Keyword(s):  
Change Detection ◽  
Frequency Analysis ◽  
Brain Activity ◽  
Change Blindness ◽  
Alpha Power ◽  
Beta Band ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Theta Power ◽  
Oscillatory Brain Activity

Despite the importance of change detection (CD) for visual perception and for performance in our environment, observers often miss changes that should be easily noticed. In the present study, we employed time–frequency analysis to investigate the neural activity associated with CD and change blindness (CB). Observers were presented with two successive visual displays and had to look for a change in orientation in any one of four sinusoid gratings between both displays. Theta power increased widely over the scalp after the second display when a change was consciously detected. Relative to no-change and CD, CB was associated with a pronounced theta power enhancement at parietal-occipital and occipital sites and broadly distributed alpha power suppression during the processing of the prechange display. Finally, power suppressions in the beta band following the second display show that, even when a change is not consciously detected, it might be represented to a certain degree. These results show the potential of time–frequency analysis to deepen our knowledge of the temporal curse of the neural events underlying CD. The results further reveal that the process resulting in CB begins even before the occurrence of the change itself.

Time-frequency analysis of short-lasting modulation of EEG induced by intracortical and transcallosal paired TMS over motor areas

2012 ◽  
Vol 107 (9) ◽  
pp. 2475-2484 ◽  
Author(s):  
Paolo Manganotti ◽  
Emanuela Formaggio ◽  
Silvia Francesca Storti ◽  
Daniele De Massari ◽  
Alessandro Zamboni ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Primary Motor Cortex ◽  
Brain Activity ◽  
High Rate ◽  
Experimental Session ◽  
Perturbation Approach ◽  
Eeg Rhythms ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Oscillatory Brain Activity

Dynamic changes in spontaneous electroencephalogram (EEG) rhythms can be seen to occur with a high rate of variability. An innovative method to study brain function is by triggering oscillatory brain activity with transcranial magnetic stimulation (TMS). EEG-TMS coregistration was performed on five healthy subjects during a 1-day experimental session that involved four steps: baseline acquisition, unconditioned single-pulse TMS, intracortical inhibition (ICI, 3 ms) paired-pulse TMS, and transcallosal stimulation over left and right primary motor cortex (M1). A time-frequency analysis based on the wavelet method was used to characterize rapid modifications of oscillatory EEG rhythms induced by TMS. Single, paired, and transcallosal TMS applied on the sensorimotor areas induced rapid desynchronization over the frontal and central-parietal electrodes mainly in the alpha and beta bands, followed by a rebound of synchronization, and rapid synchronization of delta and theta activity. Wavelet analysis after a perturbation approach is a novel way to investigate modulation of oscillatory brain activity. The main findings are consistent with the concept that the human motor system may be based on networklike oscillatory cortical activity and might be modulated by single, paired, and transcallosal magnetic pulses applied to M1, suggesting a phenomenon of fast brain activity resetting and triggering of slow activity.

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