نتایج جستجو برای: alpha band

تعداد نتایج: 332888  

Journal: :Journal of structural biology 2000
P K Luther

The Z-band in vertebrate striated muscles, mainly comprising actin filaments, alpha-actinin, and titin, serves to organise the antiparallel actin filament arrays in adjacent sarcomeres and to transmit tension between sarcomeres during activation. Different Z-band thicknesses, formed from different numbers of zigzag crosslinking layers and found in different fibre types, are thought to be associ...

Journal: :Brain research 2009
Lisa Payne John Kounios

Accumulating evidence suggests that top-down processes, reflected by frontal-midline theta-band (4-8 Hz) electroencephalogram (EEG) oscillations, strengthen the activation of a memory set during short-term memory (STM) retention. In addition, the amplitude of posterior alpha-band (8-13 Hz) oscillations during STM retention is thought to reflect a mechanism that protects fragile STM activations ...

Journal: :Cerebral cortex 2009
Simon Hanslmayr Bernhard Spitzer Karl-Heinz Bäuml

Prior studies, mostly using intentional learning, suggest that power increases in theta and gamma oscillations and power decreases in alpha and beta oscillations are positively related to later remembering. Using incidental learning, this study investigated whether these brain oscillatory subsequent memory effects can be differentiated by encoding task. One group of subjects studied material pe...

Journal: :Physical review 2022

Two-dimensional Dirac materials with a flat band have been demonstrated to possess plethora of unusual electronic properties, but the optical properties these are less studied. Utilizing $\alpha$-$\mathcal{T}_3$ lattice as prototypical system, where $0\le \alpha \le 1$ is tunable parameter and through conic intersection two cones arises for $\alpha > 0$, we investigate conductivity flat-band ma...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2008
E A Jagla

I study the average deformation rate of an amorphous material submitted to an external uniform shear strain rate, in the geometry known as the split-bottom configuration. The material is described using a stochastic model of plasticity at a mesoscopic scale. A shear band is observed to start at the split point at the bottom, and widen progressively towards the surface. In a two-dimensional geom...

Journal: :Cerebral cortex 2007
Michael Murias James M Swanson Ramesh Srinivasan

Abnormal functional brain connectivity is a candidate factor in developmental brain disorders associated with cognitive dysfunction. We analyzed a substantial (10 min per subject) record of dense array electroencephalography with spectral power and coherence methods in attention-deficit hyperactivity disorder (ADHD) (n = 42) and control (n = 21) 10- to 13-year-old children. We found topographic...

2014
Winfried Schlee Martin Schecklmann Astrid Lehner Peter M Kreuzer Veronika Vielsmeier Timm B Poeppl Berthold Langguth

Subjective tinnitus is characterized by the conscious perception of a phantom sound which is usually more prominent under silence. Resting state recordings without any auditory stimulation demonstrated a decrease of cortical alpha activity in temporal areas of subjects with an ongoing tinnitus perception. This is often interpreted as an indicator for enhanced excitability of the auditory cortex...

2013
Bo Tan Xianxian Kong Ping Yang Zhenlan Jin Ling Li

To study the differences in functional brain networks between eyes-closed (EC) and eyes-open (EO) at resting state, electroencephalographic (EEG) activity was recorded in 21 normal adults during EC and EO states. The synchronization likelihood (SL) was applied to measure correlations between all pairwise EEG channels, and then the SL matrices were converted to graphs by thresholding. Graphs wer...

Journal: :NeuroImage 2015
Jonathan T. W. Schubert Verena N. Buchholz Julia Föcker Andreas K. Engel Brigitte Röder Tobias Heed

Touch can be localized either on the skin in anatomical coordinates, or, after integration with posture, in external space. Sighted individuals are thought to encode touch in both coordinate systems concurrently, whereas congenitally blind individuals exhibit a strong bias for using anatomical coordinates. We investigated the neural correlates of this differential dominance in the use of anatom...

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