scholarly journals Stimulus-specific plasticity in human visual gamma-band activity and functional connectivity

2020 ◽  
Author(s):  
Benjamin J. Stauch ◽  
Alina Peter ◽  
Heike Schuler ◽  
Pascal Fries
Keyword(s):  
Spike Timing ◽  
Gamma Band ◽  
Neuronal Responses ◽  
Visual Areas ◽  
Early Visual Cortex ◽  
Neuronal Processing ◽  
Gamma Band Activity ◽  
And Behavior ◽  
The Impact ◽  
Band Activity

Stimulus repetition reduces neuronal responses in sensory areas, while leaving perceptual fidelity and behavioral performance intact. Visual gamma-band activity decreases for few stimulus repetitions in humans, yet increases for many repetitions in macaques. Using magnetoencephalography, we confirmed that gamma decreases for the first few stimulus repetitions, and, as in macaques, increases for further repetitions. Crucially, this increase did not transfer to other stimuli, suggesting that the circuit changes were specific to the inducing stimulus. The increase partially persisted when the inducing stimulus was repeated after 25 minutes of intervening stimuli. The increase was most pronounced in early visual areas, and entailed an increased feedforward influence onto higher areas. Our results suggest that early visual cortex gamma synchronization subserves adaptative neuronal processing of recurring stimuli. We propose that drive-dependent gamma phase shifting combines with spike timing-dependent synaptic plasticity to reduce overall responses, while maintaining the impact on higher areas and behavior.

scholarly journals Stimulus-specific plasticity in human visual gamma-band activity and functional connectivity

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Benjamin J Stauch ◽  
Alina Peter ◽  
Heike Schuler ◽  
Pascal Fries
Keyword(s):  
Visual Cortex ◽  
Human Subjects ◽  
Gamma Band ◽  
Stimulus Repetition ◽  
Oscillatory Dynamics ◽  
Early Visual Cortex ◽  
Neuronal Processing ◽  
Plastic Changes ◽  
Gamma Band Activity ◽  
Band Activity

Under natural conditions, the visual system often sees a given input repeatedly. This provides an opportunity to optimize processing of the repeated stimuli. Stimulus repetition has been shown to strongly modulate neuronal-gamma band synchronization, yet crucial questions remained open. Here we used magnetoencephalography in 30 human subjects and find that gamma decreases across ≈10 repetitions and then increases across further repetitions, revealing plastic changes of the activated neuronal circuits. Crucially, increases induced by one stimulus did not affect responses to other stimuli, demonstrating stimulus specificity. Changes partially persisted when the inducing stimulus was repeated after 25 minutes of intervening stimuli. They were strongest in early visual cortex and increased interareal feedforward influences. Our results suggest that early visual cortex gamma synchronization enables adaptive neuronal processing of recurring stimuli. These and previously reported changes might be due to an interaction of oscillatory dynamics with established synaptic plasticity mechanisms.

Human gamma-band activity and behavior

2011 ◽  
Vol 79 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Maria K. Rieder ◽  
Benjamin Rahm ◽  
John D. Williams ◽  
Jochen Kaiser
Keyword(s):  
Gamma Band ◽  
Gamma Band Activity ◽  
And Behavior ◽  
Band Activity

Gamma band activity in an auditory oddball paradigm studied with the wavelet transform

2001 ◽  
Vol 112 (7) ◽  
pp. 1219-1228 ◽  
Author(s):  
I.G Gurtubay ◽  
M Alegre ◽  
A Labarga ◽  
A Malanda ◽  
J Iriarte ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Gamma Band ◽  
Oddball Paradigm ◽  
Auditory Oddball ◽  
Gamma Band Activity ◽  
Auditory Oddball Paradigm ◽  
Band Activity

scholarly journals Increased Thalamic Gamma Band Activity Correlates with Symptom Relief following Deep Brain Stimulation in Humans with Tourette’s Syndrome

PLoS ONE ◽  
2012 ◽  
Vol 7 (9) ◽  
pp. e44215 ◽  
Author(s):  
Nicholas Maling ◽  
Rowshanak Hashemiyoon ◽  
Kelly D. Foote ◽  
Michael S. Okun ◽  
Justin C. Sanchez
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Symptom Relief ◽  
Gamma Band ◽  
Tourette's Syndrome ◽  
Tourette’S Syndrome ◽  
Gamma Band Activity ◽  
Band Activity ◽  
Deep Brain

Gamma band activity and its synchronization reflect the dysfunctional emotional processing in alexithymic persons

2006 ◽  
Vol 43 (6) ◽  
pp. 533-540 ◽  
Author(s):  
Atsushi Matsumoto ◽  
Yoko Ichikawa ◽  
Noriaki Kanayama ◽  
Hideki Ohira ◽  
Tetsuya Iidaka
Keyword(s):  
Emotional Processing ◽  
Gamma Band ◽  
Gamma Band Activity ◽  
Band Activity

scholarly journals Increased EEG gamma band activity in Alzheimer’s disease and mild cognitive impairment

2008 ◽  
Vol 115 (9) ◽  
pp. 1301-1311 ◽  
Author(s):  
J. A. van Deursen ◽  
E. F. P. M. Vuurman ◽  
F. R. J. Verhey ◽  
V. H. J. M. van Kranen-Mastenbroek ◽  
W. J. Riedel
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Gamma Band ◽  
Gamma Band Activity ◽  
Band Activity

Interictal Abnormalities of Gamma Band Activity in Visual Evoked Responses in Migraine: An Indication of Thalamocortical Dysrhythmia?

Cephalalgia ◽  
2007 ◽  
Vol 27 (12) ◽  
pp. 1360-1367 ◽  
Author(s):  
G Coppola ◽  
A Ambrosini ◽  
L Di Clemente ◽  
D Magis ◽  
A Fumal ◽  
...  
Keyword(s):  
High Frequency ◽  
Gamma Band ◽  
Pattern Reversal ◽  
Evoked Responses ◽  
Visual Evoked Responses ◽  
High Frequency Oscillations ◽  
Thalamocortical Dysrhythmia ◽  
Gamma Band Activity ◽  
Band Activity ◽  
Visual Evoked

Between attacks, migraineurs lack habituation in standard visual evoked potentials (VEPs). Visual stimuli also evoke high-frequency oscillations in the gamma band range (GBOs, 20–35 Hz) assumed to be generated both at subcortical (early GBOs) and cortical levels (late GBOs). The consecutive peaks of GBOs were analysed regarding amplitude and habituation in six successive blocks of 100 averaged pattern reversal (PR)-VEPs in healthy volunteers and interictally in migraine with (MA) or without aura patients. Amplitude of the two early GBO components in the first PR-VEP block was significantly increased in MA patients. There was a significant habituation deficit of the late GBO peaks in migraineurs. The increased amplitude of early GBOs could be related to the increased interictal visual discomfort reported by patients. We hypothesize that the hypo-functioning serotonergic pathways may cause, in line with the thalamocortical dysrhythmia theory, a functional disconnection of the thalamus leading to decreased intracortical lateral inhibition, which can induce dishabituation.

scholarly journals High-threshold Ca2+channels behind gamma band activity in the pedunculopontine nucleus (PPN)

2015 ◽  
Vol 3 (6) ◽  
pp. e12431 ◽  
Author(s):  
Brennon Luster ◽  
Stasia D'Onofrio ◽  
Francisco Urbano ◽  
Edgar Garcia-Rill
Keyword(s):  
Pedunculopontine Nucleus ◽  
Gamma Band ◽  
High Threshold ◽  
Gamma Band Activity ◽  
Ca2 Channels ◽  
Band Activity

scholarly journals Neurophenomenology of Out-of-Body experiences induced by hypnotic suggestions

2018 ◽  
Author(s):  
Enrico Facco ◽  
Edoardo Casiglia ◽  
Benedikt Emanuel Al Khafaji ◽  
Francesco Finatti ◽  
Gian Marco Duma ◽  
...  
Keyword(s):  
Positive Affect ◽  
Multisensory Integration ◽  
Spectral Power ◽  
Gamma Band ◽  
Altered State ◽  
Brain Areas ◽  
Body Experiences ◽  
Gamma Band Activity ◽  
Band Activity ◽  
Hypnotic Suggestions

Inducing out-of-body experiences in hypnosis (H-OBEs) offers an almost unique opportunity to investigate them in a controlled condition.OBEs were induced as imaginative task in resting conditions (I-OBE) or in hypnosis (H-OBE) in 15 high hypnotizable subjects. A 32-channel EEG was recorded and the spectral power and imaginary coherence were calculated. At the end of each session, the Phenomenology of Consciousness Inventory (PCI) was administered to check the phenomenological aspects of their experience.Significantly higher scores in the Altered State, Positive Affect, Altered Experience and Attention subdimensions of the PCI were reported in H-OBE than in I-OBE, which were associated to a significant decrease of power in beta and gamma band activity in right parieto-temporal derivations. Our result suggest that H-OBE may be an appealing model of “true” OBEs, including an alteration of multisensory integration in right parieto-temporal brain areas.

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