Results 11 to 20 of about 8,598 (236)
Modeling the contribution of theta-gamma coupling to sequential memory, imagination, and dreaming [PDF]
Frontiers in Neural CircuitsGamma oscillations nested in a theta rhythm are observed in the hippocampus, where are assumed to play a role in sequential episodic memory, i.e., memorization and retrieval of events that unfold in time. In this work, we present an original neurocomputational model based on neural masses, which simulates the encoding of sequences of events in the ...
Mauro Ursino +2 more
exaly +6 more sources
A computational study on altered theta-gamma coupling during learning and phase coding. [PDF]
PLoS ONE, 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 ...
Xuejuan Zhang +4 more
doaj +5 more sources
Theta-gamma coupling binds visual perceptual features in an associative memory task [PDF]
Scientific Reports, 2018 AbstractIt is an integral function of the human brain to sample novel information from the environment and to integrate them into existing representations. Recent evidence suggests a specific role for the theta rhythm (4–8 Hz) in mnemonic processes and the coupling between the theta and the gamma rhythm (40–120 Hz) in ordering and binding perceptual ...
Holger Finger +2 more
exaly +6 more sources
Cortical theta-gamma coupling governs the adaptive control of motor commands. [PDF]
Brain Commun, 2022 Abstract Motor control requires the adaptive updating of internal models to successfully target desired outcomes. This adaptive control can be proactive, such that imminent actions and corresponding sensorimotor programmes are anticipated prior to movement, or reactive, such that online error correction is necessary to adjust to sudden ...
Spooner RK, Wilson TW.
europepmc +3 more sources
Increasing human motor skill acquisition by driving theta-gamma coupling. [PDF]
Elife, 2021 Skill learning is a fundamental adaptive process, but the mechanisms remain poorly understood. Some learning paradigms, particularly in the memory domain, are closely associated with gamma activity that is amplitude modulated by the phase of underlying theta activity, but whether such nested activity patterns also underpin skill learning is unknown ...
Akkad H +8 more
europepmc +5 more sources
GluK1 kainate receptors in parvalbumin interneurons modulate cortico-hippocampal network dynamics during social behavior [PDF]
Translational PsychiatryThe prefrontal cortex orchestrates complex behaviors by communicating with subcortical structures through synchronized oscillations. Here we show that ablation of GluK1 subunit-containing kainate receptors in parvalbumin interneurons (PV INs) disrupts ...
Jun Kyu Rhee +8 more
doaj +2 more sources
Theta-gamma coupling depends on breathing rate [PDF]
Sleep, 2020 Abstract Temporal coupling between theta and gamma oscillations is a hallmark activity pattern of several cortical networks and becomes especially prominent during REM sleep. In a parallel approach, nasal breathing has been recently shown to generate phase-entrained network oscillations which also modulate gamma.
Maximilian Hammer +4 more
openaire +4 more sources
Impaired theta-gamma coupling in APP-deficient mice. [PDF]
Sci Rep, 2016 AbstractAmyloid precursor protein (APP) is critically involved in the pathophysiology of Alzheimer’s disease, but its physiological functions remain elusive. Importantly, APP knockout (APP-KO) mice exhibit cognitive deficits, suggesting that APP plays a role at the neuronal network level.
Zhang X +6 more
europepmc +5 more sources
Analytical Insights on Theta-Gamma Coupled Neural Oscillators [PDF]
The Journal of Mathematical Neuroscience, 2013 In this paper, we study the dynamics of a quadratic integrate-and-fire neuron, spiking in the gamma (30-100 Hz) range, coupled to a delta/theta frequency (1-8 Hz) neural oscillator. Using analytical and semianalytical methods, we were able to derive characteristic spiking times for the system in two distinct regimes (depending on parameter values): one
Fontolan, Lorenzo +3 more
openaire +5 more sources
Memory entrainment by visually evoked theta-gamma coupling [PDF]
NeuroImage, 2017 Abstract It is an integral function of the human brain to sample novel information from the environment and to update the internal representation of the external world. The formation of new memories is assumed to be orchestrated by neuronal oscillations, the rhythmic synchronization of neuronal activity within and ...
Köster, Moritz +2 more
openaire +2 more sources