A mechanism for inter-areal coherence through communication based on connectivity and oscillatory power

Schneider, Marius; Broggini, Ana Clara; Dann, Benjamin; Tzanou, Athanasia; Uran, Cem; Sheshadri, Swathi; Scherberger, Hansjörg; Vinck, Martin

doi:10.1016/j.neuron.2021.09.037

Cited by 119 publications

(116 citation statements)

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“…Some studies have suggested that gamma is an emergent property of the cortex [ 58 ] and that it is likely to be generated in the superficial layer of V1 [ 59 – 62 ]. Other studies have proposed that gamma is generated in subcortical regions including the LGN [ 55 , 63 ] and retina [ 56 ]. Our results show that the HG component is generated in the subcortical region and that the generation of LG and MG is caused by cortical mechanisms ( Fig 5 ).…”

Section: Discussionmentioning

confidence: 99%

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Multiple gamma rhythms carry distinct spatial frequency information in primary visual cortex

Han

Yang

et al. 2021

PLoS Biol

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Gamma rhythms in many brain regions, including the primary visual cortex (V1), are thought to play a role in information processing. Here, we report a surprising finding of 3 narrowband gamma rhythms in V1 that processed distinct spatial frequency (SF) signals and had different neural origins. The low gamma (LG; 25 to 40 Hz) rhythm was generated at the V1 superficial layer and preferred a higher SF compared with spike activity, whereas both the medium gamma (MG; 40 to 65 Hz), generated at the cortical level, and the high gamma HG; (65 to 85 Hz), originated precortically, preferred lower SF information. Furthermore, compared with the rates of spike activity, the powers of the 3 gammas had better performance in discriminating the edge and surface of simple objects. These findings suggest that gamma rhythms reflect the neural dynamics of neural circuitries that process different SF information in the visual system, which may be crucial for multiplexing SF information and synchronizing different features of an object.

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Section: Discussionmentioning

confidence: 99%

“…Besides the neural mechanisms of gamma rhythms at the circuit level, many studies have suggested that gamma may play a feedforward role in communication among different brain regions [ 62 , 63 , 67 , 74 , 75 ]. The bottom-up (feedforward input) or top-down (endogenous state) mechanism may also affect the property of gamma rhythms.…”

Section: Discussionmentioning

confidence: 99%

Multiple gamma rhythms carry distinct spatial frequency information in primary visual cortex

Han

Yang

et al. 2021

PLoS Biol

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“…The main goal of this approach is to understand the specific neuronal circuits and cellular populations that are necessary for different behaviors. As a result, state-induced oscillatory activity helps track activated areas and synchronized brain regions (Hultman et al, 2018;Schneider et al, 2021), to evaluate which neuronal populations drive the activity, and their impact on behavior (Harris and Gordon, 2015). Unlike the approach described above, these investigations are not driven by specific hypotheses about general functional roles of specific rhythms.…”

Section: Rhythms As a Window To Understand The Neuronal Circuits Unde...mentioning

confidence: 99%

“…Similarly, recent work demonstrated that simultaneous bilateral gamma stimulation, but not asynchronous or non-gamma frequency stimulation, increased gamma synchrony and restored cognitive flexibility (Cho et al, 2020). In contrast, another recent study used optogenetic manipulations and modeling to argue that long-range coherence simply reflects, but does not directly contribute to, communication between brain areas (Schneider et al, 2021). While these studies are unlikely to resolve this long-standing debate (Singer, 2018), they lay the groundwork for future experiments that interrogate the role of oscillations in circuit communication during behavior with optogenetic interventions.…”

Section: Addressing Oscillations With Optogeneticsmentioning

confidence: 99%

Breaking Down a Rhythm: Dissecting the Mechanisms Underlying Task-Related Neural Oscillations

Ibarra-Lecue

Haegens

Harris

2022

Front. Neural Circuits

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A century worth of research has linked multiple cognitive, perceptual and behavioral states to various brain oscillations. However, the mechanistic roles and circuit underpinnings of these oscillations remain an area of active study. In this review, we argue that the advent of optogenetic and related systems neuroscience techniques has shifted the field from correlational to causal observations regarding the role of oscillations in brain function. As a result, studying brain rhythms associated with behavior can provide insight at different levels, such as decoding task-relevant information, mapping relevant circuits or determining key proteins involved in rhythmicity. We summarize recent advances in this field, highlighting the methods that are being used for this purpose, and discussing their relative strengths and limitations. We conclude with promising future approaches that will help unravel the functional role of brain rhythms in orchestrating the repertoire of complex behavior.

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“…The gray shaded areas of the LFP are gamma-band bursts. Each black bar in the spectrogram marks the peak frequency (y-axis) and the duration of each gammaband burst studies have shown that gamma is generated in subcortical regions, including LGN (Saleem et al 2017;Schneider et al 2021) and retina (Storchi et al 2017) (Fig. 5B).…”

Section: Do Gamma Rhythms Serve a Canonical Function?mentioning

confidence: 99%

Gamma rhythms in the visual cortex: functions and mechanisms

2021

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Gamma-band activity, peaking around 30–100 Hz in the local field potential's power spectrum, has been found and intensively studied in many brain regions. Although gamma is thought to play a critical role in processing neural information in the brain, its cognitive functions and neural mechanisms remain unclear or debatable. Experimental studies showed that gamma rhythms are stochastic in time and vary with visual stimuli. Recent studies further showed that multiple rhythms coexist in V1 with distinct origins in different species. While all these experimental facts are a challenge for understanding the functions of gamma in the visual cortex, there are many signs of progress in computational studies. This review summarizes and discusses studies on gamma in the visual cortex from multiple perspectives and concludes that gamma rhythms are still a mystery. Combining experimental and computational studies seems the best way forward in the future.

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A mechanism for inter-areal coherence through communication based on connectivity and oscillatory power

Cited by 119 publications

References 103 publications

Multiple gamma rhythms carry distinct spatial frequency information in primary visual cortex

Multiple gamma rhythms carry distinct spatial frequency information in primary visual cortex

Breaking Down a Rhythm: Dissecting the Mechanisms Underlying Task-Related Neural Oscillations

Gamma rhythms in the visual cortex: functions and mechanisms

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