Representation of symmetry in the extrastriate visual cortex from temporal integration of parts: An EEG/ERP study

Rampone, Giulia; Makin, Alexis D. J.; Tatlidil, Semir; Bertamini, Marco

doi:10.1016/j.neuroimage.2019.03.007

Cited by 24 publications

(42 citation statements)

References 74 publications

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“…Furthermore, the SPN can be recorded when participants are engaged in either active symmetry discrimination or in some secondary task ( Höfel & Jacobsen, 2007a , 2007b ; Makin, Rampone, Pecchinenda, & Bertamini, 2013 ). Other SPN work has shown that the extrastriate symmetry network always responds to symmetry in the image, but can sometimes go beyond this and recover symmetry in the object, independent of changes in virtual view angle ( Makin, Rampone, & Bertamini, 2015 ) and despite partial occlusion ( Rampone, Makin, Tatlidil, & Bertamini, 2019 ). Finally, the steady-state visual evoked potential approach can be used to isolate the symmetry response in the odd harmonic frequencies ( Alp, Kohler, Kogo, Wagemans, & Norcia, 2018 ; Kohler et al., 2016 ; Norcia, Candy, Pettet, Vildavski, & Tyler, 2002 ) and the amplitude of this signal also scales with symmetry salience ( Oka, Victor, Conte, & Yanagida, 2007 ).…”

Section: Introductionmentioning

confidence: 99%

The extrastriate symmetry response can be elicited by flowers and landscapes as well as abstract shapes

et al. 2020

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Previous research has investigated the neural response to visual symmetry. It is well established that symmetry activates a network of extrastriate visual regions, including V4 and the Lateral Occipital Complex. This symmetry response generates an event-related potential called the sustained posterior negativity (SPN). However, previous work has used abstract stimuli, typically dot patterns or shapes. We tested the generality of the SPN. We confirmed that the SPN wave was present and of similar amplitude for symmetrical shapes, flowers and landscapes, whether participants were responding either to image symmetry or to image color. We conclude that the extrastriate symmetry response can be generated by any two-dimensional image and is similar in different stimulus domains. Recent research has focused on the neural responses to visual symmetry (Bertamini & Makin, 2014; Bertamini, Silvanto, Norcia, Makin, & Wagemans, 2018; Cattaneo, 2017). Functional magnetic resonance imaging (fMRI) has shown that symmetry activates a network of areas in the extrastriate cortex, with the strongest responses in area V4 and in the shape-sensitive Lateral Occipital Complex (LOC). Moreover, there is no symmetry response in V1 or V2 (

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Section: Introductionmentioning

confidence: 99%

The extrastriate symmetry response can be elicited by flowers and landscapes as well as abstract shapes

et al. 2020

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“…After all, previous studies have shown that the SPN indexes symmetry in the object when participants are attending to regularity, while it only indexes symmetry in the image when participants attend to colour (Makin et al, 2015). Furthermore, when participants attend to regularity, the SPN can be generated by partially occluded symmetry (Rampone, Makin, Tatlidil, & Bertamini, 2019). It seems that attention to regularity allows the system to go beyond image symmetry, and generate extraretinal, object-level symmetry representations, which show perceptual constancy.…”

Section: Future Work On Spn Primingmentioning

confidence: 90%

A new ERP repetition paradigm to assess independence of regularity representations in the extrastriate cortex.

Makin¹,

Bertamini²,

Rampone³

et al. 2020

Preprint

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An ERP component called the Sustained Posterior Negativity (SPN) indexes the brain response to regularity in visual patterns (e.g. vertical reflectional symmetry, horizontal reflectional symmetry or rotational symmetry). However it is unclear if different regularities are coded by independent or overlapping neural populations. Previous work has successfully exploited repetition effects to assess representational independence, and we adapted this approach to investigate visual regularity. Experiment 1 (N = 48) found that SPN amplitude increased when three reflectional symmetry patterns were presented sequentially. This SPN priming effect did not survive changes in retinal location (Experiment 2, N = 48) or non-orthogonal changes in axis orientation (Experiment 3, N= 48). However, SPN priming transferred between vertical and horizontal axis orientation (Experiment 4, N= 48) and between reflectional and rotational symmetry (Experiment 5, N= 48). We conclude that visual regularities at different retinal locations are coded independently. However, there is some overlap between different regularities presented at the same retinal location.

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“…We thus broke the SPN into two separate time windows: 220–400 ms (early SPN) and 400–1,000 ms (late SPN). The decision to consider an early and late SPN separately is justified by recent research (Makin et al, 2016; Rampone et al, 2019; Wright, Makin, & Bertamini, 2017). In the early time window, amplitude has been found to maximally correlate with a quantitative index of perceptual goodness.…”

Section: Methodsmentioning

confidence: 99%

“…Briefly, the SPN is a relative component given by the difference in amplitude between ERPs generated by symmetrical (regular) and asymmetrical (irregular) images with same local information. It has negative amplitude and is generated by neurons in the extrastriate cortex and lateral occipital complex (LOC; Makin, Pecchinenda, & Bertamini, 2012; Makin et al, 2016; Rampone, Makin, Tatlidil, & Bertamini, 2019). The SPN is a well‐characterised neural signal, and its interpretation is consistent with fMRI (Chen, Kao, & Tyler, 2007; Keefe et al, 2018; Kohler, Clarke, Yakovleva, Liu, & Norcia, 2016; Sasaki, Vanduffel, Knutsen, Tyler, & Tootell, 2005; Tyler et al, 2005; Van Meel, Baeck, Gillebert, Wagemans, & Op de Beeck, 2019) and TMS evidence (Bona, Cattaneo, & Silvanto, 2016; Bona, Herbert, Toneatto, Silvanto, & Cattaneo, 2014; Cattaneo et al, 2014; Cattaneo, Bona, & Silvanto, 2017).…”

Section: Introductionmentioning

confidence: 99%

Electrophysiological responses to regularity show specificity to global form: The case of Glass patterns

Rampone

Makin

2020

Eur J of Neuroscience

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The holographic weight of evidence model (van der Helm & Leeuwenberg, J Math Psychol, 35, 1991, 151; van der Helm & Leeuwenberg, Psychol Rev, 103, 1996, 429) estimates that the perceptual goodness of moiré structures (Glass patterns), irrespective of their global form, is comparable to that of reflection symmetry. However, both behavioural and neuroscience evidences suggest that certain Glass forms (i.e. circular and radial structures) are perceptually more salient than others (i.e. translation structures) and may recruit different perceptual mechanisms. In this study, we tested whether brain responses for circular, radial and translation Glass patterns are comparable to the response for onefold bilateral reflection symmetry. We recorded an event‐related potential (ERP), called the sustained posterior negativity (SPN), which has been shown to index perceptual goodness of a range of regularities. We found that circular and radial Glass patterns generated a comparable SPN amplitude to onefold reflection symmetry (in line with the prediction of the holographic model), starting approx. 180 ms after stimulus onset. Conversely, the SPN response to translation Glass patterns had a longer latency (approx. 400 ms). These results show that Glass patterns are a special case of visual regularity, and perceptual goodness may not be fully explained by the holographic identities that constitute it. Specialised processing mechanisms might exist in the regularity‐sensitive extrastriate areas, which are tuned to global form configurations.

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Representation of symmetry in the extrastriate visual cortex from temporal integration of parts: An EEG/ERP study

Cited by 24 publications

References 74 publications

The extrastriate symmetry response can be elicited by flowers and landscapes as well as abstract shapes

The extrastriate symmetry response can be elicited by flowers and landscapes as well as abstract shapes

A new ERP repetition paradigm to assess independence of regularity representations in the extrastriate cortex.

Electrophysiological responses to regularity show specificity to global form: The case of Glass patterns

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