نتایج جستجو برای: gamma rhythm
تعداد نتایج: 152751 فیلتر نتایج به سال:
Introduction: Many employees in different professions including nurses work with shifts. On the other hand, different and long shift work can endanger physical and mental health of nurses. This study, according to ergonomic standards, aimed to design a model for shift working in order to minimize the problems caused by shift work. Methods: In this study, all 35 nurses working in the emergen...
Cognition requires the dynamic modulation of effective connectivity, i.e., the modulation of the postsynaptic neuronal response to a given input. If postsynaptic neurons are rhythmically active, this might entail rhythmic gain modulation, such that inputs synchronized to phases of high gain benefit from enhanced effective connectivity. We show that visually induced gamma-band activity in awake ...
The role of synchronized oscillations Synchronised neural oscillations in low(delta, theta and alpha) and high(beta and gamma) frequency bands are a fundamental mechanism for enabling coordinated activity during normal brain functioning [Buzsaki & Draguhn, 2004; Fries, 2009]. A large body of evidence from invasive electrophysiology in non-human primates and electroand magnetoencephalographic(EE...
High-gamma activity, ranging in frequency between ∼60 Hz and 200 Hz, has been observed in local field potential, electrocorticography, EEG and magnetoencephalography signals during cortical activation, in a variety of functional brain systems. The origin of these signals is yet unknown. Using computational modeling, we show that a cortical network model receiving thalamic input generates high-g...
Visual cortex (V1) exhibits two types of gamma oscillation: a well-characterized broadband (30-90Hz) rhythm, and a narrowband oscillation occurring at frequencies close to 60 Hz in mice. We investigated the source of narrowband gamma, the factors modulating its strength, and its relationship to broadband gamma. Narrowband and broadband gamma power were uncorrelated. Increasing visual contrast h...
Gamma activity in the subthalamic nucleus (STN) is widely viewed as a pro-kinetic rhythm. Here we test the hypothesis that rather than being specifically linked to movement execution, gamma activity reflects dynamic processing in this nucleus. We investigated the role of gamma during fast stopping and recorded scalp electroencephalogram and local field potentials from deep brain stimulation ele...
Primary visual cortex exhibits two types of gamma rhythm: broadband activity in the 30-90 Hz range and a narrowband oscillation seen in mice at frequencies close to 60 Hz. We investigated the sources of the narrowband gamma oscillation, the factors modulating its strength, and its relationship to broadband gamma activity. Narrowband and broadband gamma power were uncorrelated. Increasing visual...
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