Results 11 to 20 of about 705,376 (237)

Gamma rhythm in patients with ischemic stroke

open access: yesЛечащий Врач
Background. Gamma rhythm plays an important role in enabling cognitive processes. Studies confirm the association of gamma activity with visual and auditory perception, time perception, attention, consciousness and processing of semantic information ...
L. B. Novikova, K. M. Sharapova
doaj   +2 more sources

Experimental Measurements and Computer Simulation of Fission Product Gamma-Ray Spectra [PDF]

open access: yes, 1997
Airborne gamma ray spectrometry using high volume scintillation detectors, optionally in conjunction with Ge detectors, has potential for making rapid environmental measurements in response to nuclear accidents. An experimental investigation and computer
Sanderson, D.C.W.   +4 more
core   +8 more sources

Interacting rhythms enhance sensitivity of target detection in a fronto-parietal computational model of visual attention

open access: yeseLife, 2023
Even during sustained attention, enhanced processing of attended stimuli waxes and wanes rhythmically, with periods of enhanced and relatively diminished visual processing (and subsequent target detection) alternating at 4 or 8 Hz in a sustained visual ...
Amélie Aussel   +4 more
doaj   +1 more source

A computational study on altered theta-gamma coupling during learning and phase coding [PDF]

open access: yes, 2012
There is considerable interest in the role of coupling between theta and gamma oscillations in the brain in the context of learning and memory. Here we have used a neural network model which is capable of producing coupling of theta phase to gamma ...
Yang Zhan   +19 more
core   +2 more sources

Frequency Characteristics of Rhythm Non-Assimilation in Canine Ventricular Fibrillation

open access: yesОбщая реаниматология, 2010
Ventricular fibrillation is the main cause of sudden cardiac death in many countries, including Russia; therefore to study ventricular fibrillation is an urgent problem.
M. I. Guryanov
doaj   +1 more source

Learning alters theta amplitude, theta-gamma coupling and neuronal synchronization in inferotemporal cortex [PDF]

open access: yes, 2011
Background: How oscillatory brain rhythms alone, or in combination, influence cortical information processing to support learning has yet to be fully established.
Zhang Xuejuan   +17 more
core   +4 more sources

Analysis of electroencephalography brain rhythms in the reading process

open access: yesEinstein (São Paulo), 2020
Objective: To verify if, by three distinct quantifiers, the measured electroencephalographic signal at rest is different from the signal measured during a word reading situation, especially considering the faster rhythms, gamma and high-gamma, as it ...
Camila Davi Ramos   +5 more
doaj   +2 more sources

New Insights Into the Pathogenesis of Alzheimer's Disease

open access: yesFrontiers in Neurology, 2020
Alzheimer's disease (AD), a common neurodegenerative disease in the elderly and the most prevalent cause of dementia, is characterized by progressive cognitive impairment.
Liyuan Fan   +17 more
doaj   +1 more source

Optimal flickering light stimulation for entraining gamma rhythms in older adults

open access: yesScientific Reports, 2022
With aging, optimal parameters of flickering light stimulation (FLS) for gamma entrainment may change in the eyes and brain. We investigated the optimal FLS parameters for gamma entrainment in 35 cognitively normal old adults by comparing event-related ...
Yeseung Park   +8 more
doaj   +1 more source

Effect of Stimulus Contrast and Visual Attention on Spike-Gamma Phase Relationship in Macaque Primary Visual Cortex

open access: yesFrontiers in Computational Neuroscience, 2018
Brain signals often show rhythmic activity in the so-called gamma range (30–80 Hz), whose magnitude and center frequency are modulated by properties of the visual stimulus such as size and contrast, as well as by cognitive processes such as attention ...
Aritra Das, Supratim Ray
doaj   +1 more source

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