Gestalt perception is associated with reduced parietal beta oscillations

Zaretskaya, Natalia; Bartels, Andreas

doi:10.1016/j.neuroimage.2015.02.049

Cited by 28 publications

(21 citation statements)

References 70 publications

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“…between higher-and lower-order visual areas or between fronto-parietal and visual areas, constituting a fundamental mechanism for top-down processing in the visual domain (Donner and Siegel, 2011;Bastos et al, 2015;Jensen et al, 2015;Michalareas et al, 2016). This idea is in line with studies showing a link between beta oscillations and visual crowding reviewed above and, more generally, is in line with studies linking beta oscillations to other functional aspects involved in human vision like, such as spatial orienting of attention (Siegel et al, 2008;Buschman and Miller, 2009;Fiebelkorn et al, 2018), coherent motion discrimination (Aissani et al, 2014) and Gestalt perception (Zaretskaya and Bartels, 2015).…”

Section: Introductionsupporting

confidence: 81%

“…As a further step in the characterization of the neurophysiological correlates of local processing in ASD, we tested event-related power changes in beta band oscillations at the sensor level. Invasive recordings in non-human primates and M/EEG studies in humans consistently showed that variation in oscillatory activity in alpha and beta bands reflects reentrant feedback loops and large-scale cortical interactions (Donner and Siegel, 2011;Bastos et al, 2015;Jensen et al, 2015;Zaretskaya and Bartels, 2015). As reviewed in detail in the Introduction, such reentrant feedback information carried by betaband neural oscillations might be a relevant mechanism for resolving visual crowding.…”

Section: Discussionmentioning

confidence: 97%

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Altered beta-band oscillations and connectivity underlie detail-oriented visual processing in autism

Ronconi

Vitale

Federici

et al. 2020

Preprint

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Sensory and perceptual anomalies have been increasingly recognized as core phenotypic markers for autism spectrum disorders (ASD). A neurophysiological characterization of these anomalies is of utmost importance to understand more complex behavioural manifestations within the spectrum. The present study employed electroencephalography (EEG) to test whether detail-oriented visual perception, a recognized hallmark of ASD, is associated with altered neural oscillations and functional connectivity in beta (and alpha) frequency bands, considering their role in feedback and top-down reentrant signalling in the typical population. A sample of children with diagnosis of ASD (N=18) and typically developing peers (TD; N=20) performed a visual crowding task, where they had to discriminate a peripheral target letter surrounded by flankers at different distances, together with a control condition with no flankers. In TD participants the amplitude of the target-locked N1 component and its cortical sources was significantly modulated as a function of visual crowding, whereas such modulation was absent in the ASD group, suggesting that their visual scene analysis takes place without a flexible neural computation. The comparison between groups showed a decreased activity in the ASD group in occipital, infero-temporal and inferior/middle frontal regions in conditions requiring detail-oriented perception as opposed to conditions requiring the discrimination of target in isolation. Moreover, in TD participants detail-oriented perception was associated with an event-related beta power reduction (15-30 Hz), which was not evident in the ASD group. A data-driven functional connectivity analysis highlighted in the ASD sample an increased connectivity in the beta frequency range between occipital and infero-temporal regions. Notably, individual hyperconnectivity indexes correlated to less severe ASD symptomatology and to a diminished detail-oriented perception, suggesting a potential compensatory mechanism. Overall, these results show that altered communication in the beta frequency band may explain atypical perception in ASD, reflecting aberrant feedback connectivity within the visual system with potential cascade effects in visual scene parsing and higher-order functions.

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Section: Introductionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 97%

Altered beta-band oscillations and connectivity underlie detail-oriented visual processing in autism

Ronconi

Vitale

Federici

et al. 2020

Preprint

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“…Limanowski et al, 2017;Limanowski & Friston, 2019). This inverse relationship between source-394 localized beta and the BOLD signal has been reported before(Moosmann et al, 2003; Scheeringa et 395 al., 2011;Yuan et al, 2010;Zaretskaya & Bartels, 2015) and is consistent with proposals that a loss of 396 low-relative to high-frequency power may be associated with brain 'activation' detected with fMRI 397(Chawla et al, 1999; Kilner et al, 2005; Laufs et al, 2003; Laufs, 2008). 398 Thus, our results support-in a sensorimotor setting-the hypothesized link between beta 399 oscillations and top-down contextual control in service of conveying behavioral context to lower 400 sensory regions (Bressler & Richter, 2015; Buschman & Miller, 2007; Clark et al, 2015; Donner & 401 Siegel, 2011; Friston et al, 2015; Spitzer & Haegens, 2017).…”

supporting

confidence: 76%

Cortical beta oscillations reflect the contextual gating of visual action feedback

Limanowski

Friston

2020

Preprint

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In sensorimotor integration, the brain needs to decide how its predictions should accommodate 1 novel evidence by 'gating' sensory data depending on the current context. Here, we examined the 2 oscillatory correlates of this process using magnetoencephalography (MEG). We used virtual reality 3 to decouple visual (virtual) and proprioceptive (real) hand postures during a task requiring matching 4 either modality's grasping movements to a target oscillation. Thus, we rendered visual information 5 either task-relevant or a (to-be-ignored) distractor. Under visuo-proprioceptive incongruence, 6 occipital beta power decreased relative to congruence when vision was task-relevant but increased 7 when it had to be ignored. Dynamic causal modelling (DCM) revealed that this interaction was best 8 explained by diametrical, task-dependent changes in visual gain. These results suggest a crucial role 9 for beta oscillations in sensorimotor integration; particularly, in the contextual gating (i.e., gain or 10 precision control) of visual vs proprioceptive action feedback, depending on concurrent behavioral 11 demands. 12

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“…Several studies have isolated neural correlates of spatiotemporally dynamic stimuli in areas along the dorsal stream, including V3A, V3B/KO, hMT+, and the IPS, many of which are implicated in 3-D shape processing, spatial localization, and global motion processing (Erlikhman et al, 2016; Erlikhman & Caplovitz, 2017; McCarthy, Kohler, Tse, & Caplovitz, 2015; Reichert et al, 2014; Zaretskaya et al, 2013; Zaretskaya & Bartels, 2015). For example, dynamic Kanizsa figures, such as the ones described above, activate area V3A only when those fragments are perceived as unified into a single object (McCarthy et al, 2015).…”

Section: Hallmarks Of Object-related Representations In Dorsal Cortexmentioning

confidence: 99%

Towards a unified perspective of object shape and motion processing in human dorsal cortex

Erlikhman

Caplovitz

Gurariy

et al. 2018

Consciousness and Cognition

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Although object-related areas were discovered in human parietal cortex a decade ago, surprisingly little is known about the nature and purpose of these representations, and how they differ from those in the ventral processing stream. In this article, we review evidence for the unique contribution of object areas of dorsal cortex to three-dimensional (3-D) shape representation, the localization of objects in space, and in guiding reaching and grasping actions. We also highlight the role of dorsal cortex in form-motion interaction and spatiotemporal integration, possible functional relationships between 3-D shape and motion processing, and how these processes operate together in the service of supporting goal-directed actions with objects. Fundamental differences between the nature of object representations in the dorsal versus ventral processing streams are considered, with an emphasis on how and why dorsal cortex supports veridical (rather than invariant) representations of objects to guide goal-directed hand actions in dynamic visual environments.

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Gestalt perception is associated with reduced parietal beta oscillations

Cited by 28 publications

References 70 publications

Altered beta-band oscillations and connectivity underlie detail-oriented visual processing in autism

Altered beta-band oscillations and connectivity underlie detail-oriented visual processing in autism

Cortical beta oscillations reflect the contextual gating of visual action feedback

Towards a unified perspective of object shape and motion processing in human dorsal cortex

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