Results 31 to 40 of about 8,598 (236)

Reduction in LFP cross-frequency coupling between theta and gamma rhythms associated with impaired STP and LTP in a rat model of brain ischemia

open access: yesFrontiers in Computational Neuroscience, 2013
The theta-gamma cross-frequency coupling (CFC) in hippocampus was reported to reflect memory process. In this study, we measured the CFC of hippocampal local field potentials (LFPs) in a two-vessel occlusion (2VO) rat model, combined with both amplitude ...
Tao eZhang, Xiaxia eXu, Chenguang eZheng
doaj   +1 more source

Different theta frameworks coexist in the rat hippocampus and are coordinated during memory-guided and novelty tasks

open access: yeseLife, 2020
Hippocampal firing is organized in theta sequences controlled by internal memory processes and by external sensory cues, but how these computations are coordinated is not fully understood.
Víctor J López-Madrona   +7 more
doaj   +1 more source

Delta- and theta-band cortical tracking and phase-amplitude coupling to sung speech by infants

open access: yesNeuroImage, 2022
The amplitude envelope of speech carries crucial low-frequency acoustic information that assists linguistic decoding at multiple time scales.
Adam Attaheri   +12 more
doaj   +1 more source

Theta-gamma coupling: a nonlinear dynamical model [PDF]

open access: yes, 2018
Abstract Cross-frequency coupling in the hippocampus has been hypothesized to support higher-cognition functions. While gamma modulation by theta is widely accepted, evidence of phase-coupling between the two frequency components is so far unconvincing.
Sheremet, Alex   +5 more
openaire   +1 more source

Theta‐gamma phase‐amplitude coupling in auditory cortex is modulated by language proficiency

open access: yesHuman Brain Mapping, 2023
AbstractThe coordination between the theta phase (3–7 Hz) and gamma power (25–35 Hz) oscillations (namely theta‐gamma phase‐amplitude coupling, PAC) in the auditory cortex has been proposed as an essential neural mechanism involved in speech processing.
Mikel Lizarazu   +2 more
openaire   +3 more sources

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

open access: yesBMC Neuroscience, 2011
Background How oscillatory brain rhythms alone, or in combination, influence cortical information processing to support learning has yet to be fully established.
Nicol Alister U   +5 more
doaj   +1 more source

Theta–gamma coupling increases during the learning of item–context associations [PDF]

open access: yesProceedings of the National Academy of Sciences, 2009
Phase-amplitude cross-frequency coupling (CFC) between theta (4–12 Hz) and gamma (30–100 Hz) oscillations occurs frequently in the hippocampus. However, it still remains unclear whether theta–gamma coupling has any functional significance. To address this issue, we studied CFC in local field potential oscillations recorded from the CA3 region of the ...
Adriano B L, Tort   +4 more
openaire   +2 more sources

Disentangling neocortical alpha/beta and hippocampal theta/gamma oscillations in human episodic memory formation

open access: yesNeuroImage, 2021
To form an episodic memory, we must first process a vast amount of sensory information about the to-be-encoded event and then bind these sensory representations together to form a coherent memory trace.
Benjamin J. Griffiths   +3 more
doaj   +1 more source

Theta-Nested Gamma Oscillations in Next Generation Neural Mass Models

open access: yesFrontiers in Computational Neuroscience, 2020
Theta-nested gamma oscillations have been reported in many areas of the brain and are believed to represent a fundamental mechanism to transfer information across spatial and temporal scales.
Marco Segneri   +6 more
doaj   +1 more source

Dynamics of neuronal oscillations underlying nociceptive response in the mouse primary somatosensory cortex

open access: yesScientific Reports, 2021
Pain is caused by tissue injury, inflammatory disease, pathogen invasion, or neuropathy. The perception of pain is attributed to the neuronal activity in the brain. However, the dynamics of neuronal activity underlying pain perception are not fully known.
Shosuke Iwamoto   +3 more
doaj   +1 more source

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