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Oscillatory gamma activity in humans and its role in object representation
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Stimulus Specificity of Phase-Locked and Non-Phase-Locked 40 Hz Visual Responses in Human
TLDR
This work tested the stimulus specificity of high-frequency oscillations in humans using three types of visual stimuli: two coherent stimuli (a Kanizsa and a real triangle) and a noncoherent stimulus (“no-triangle stimulus”).
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Oscillatory γ-Band (30–70 Hz) Activity Induced by a Visual Search Task in Humans
TLDR
It is suggested that this γ-band energy increase reflects both bottom-up (binding of elementary features) and top-down (search for the hidden dog) activation of the same neural assembly coding for the Dalmatian.
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Induced gamma-band activity during the delay of a visual short-term memory task in humans.
It has been hypothesized that visual objects could be represented in the brain by a distributed cell assembly synchronized on an oscillatory mode in the gamma-band (20-80 Hz). If this hypothesis is…
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Neural Dissociation between Visual Awareness and Spatial Attention
TLDR
The results suggest that subjective visual experience is shaped by the cumulative contribution of two processes operating independently at the neural level, one reflecting visual awareness per se and the other reflecting spatial attention.
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Induced γ-Band Activity during the Delay of a Visual Short-Term Memory Task in Humans
TLDR
Sustained γ-band activity during the rehearsal of the first stimulus representation in short-term memory peaked at both occipitotemporal and frontal electrodes, and fits with the idea of a synchronized cortical network centered on prefrontal and ventral visual areas.
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Oscillatory gamma-band (30-70 Hz) activity induced by a visual search task in humans.
TLDR
It is suggested that this gamma-band energy increase reflects both bottom-up (binding of elementary features) and top-down (search for the hidden dog) activation of the same neural assembly coding for the Dalmatian.
View on PubMed
The many faces of the gamma band response to complex visual stimuli
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Attention modulates gamma-band oscillations differently in the human lateral occipital cortex and fusiform gyrus.
TLDR
It is suggested that the functional role of gamma oscillations depends on the area in which they occur, both in their time-course (preparatory period and/or stimulus processing) and direction of modulation ( increase or decrease).
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Olfactory learning modifies the expression of odour‐induced oscillatory responses in the gamma (60–90 Hz) and beta (15–40 Hz) bands in the rat olfactory bulb
TLDR
This study showed for the first time that odour sampling in behaving animals is associated with a clear shift in the olfactory bulb neuronal activity from a gamma to a beta oscillatory regime, stressing the importance of studying the odour‐induced beta activity and its relation to perception and memory.
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