Visual information representation and rapid-scene categorization are simultaneous across cortex: An MEG study

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Visual information representation and rapid-scene categorization are simultaneous across cortex : An MEG study. / Ramkumar, Pavan; Hansen, Bruce C.; Pannasch, Sebastian; Loschky, Lester C.

In: NeuroImage, Vol. 134, 01.07.2016, p. 295-304.

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Ramkumar, Pavan ; Hansen, Bruce C. ; Pannasch, Sebastian ; Loschky, Lester C. / Visual information representation and rapid-scene categorization are simultaneous across cortex : An MEG study. In: NeuroImage. 2016 ; Vol. 134. pp. 295-304.

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@article{dfdafca2045c405694121f8baed826ba,
title = "Visual information representation and rapid-scene categorization are simultaneous across cortex: An MEG study",
abstract = "Perceiving the visual world around us requires the brain to represent the features of stimuli and to categorize the stimulus based on these features. Incorrect categorization can result either from errors in visual representation or from errors in processes that lead to categorical choice. To understand the temporal relationship between the neural signatures of such systematic errors, we recorded whole-scalp magnetoencephalography (MEG) data from human subjects performing a rapid-scene categorization task. We built scene category decoders based on (1) spatiotemporally resolved neural activity, (2) spatial envelope (SpEn) image features, and (3) behavioral responses. Using confusion matrices, we tracked how well the pattern of errors from neural decoders could be explained by SpEn decoders and behavioral errors, over time and across cortical areas. Across the visual cortex and the medial temporal lobe, we found that both SpEn and behavioral errors explained unique variance in the errors of neural decoders. Critically, these effects were nearly simultaneous, and most prominent between 100 and 250 ms after stimulus onset. Thus, during rapid-scene categorization, neural processes that ultimately result in behavioral categorization are simultaneous and co-localized with neural processes underlying visual information representation.",
keywords = "Confusion matrices, MEG, Multiple linear regression, Multivariate decoding, Scene gist, Spatial envelope, Timing of visual perception",
author = "Pavan Ramkumar and Hansen, {Bruce C.} and Sebastian Pannasch and Loschky, {Lester C.}",
year = "2016",
month = "7",
day = "1",
doi = "10.1016/j.neuroimage.2016.03.027",
language = "English",
volume = "134",
pages = "295--304",
journal = "NeuroImage",
issn = "1053-8119",

}

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TY - JOUR

T1 - Visual information representation and rapid-scene categorization are simultaneous across cortex

T2 - An MEG study

AU - Ramkumar, Pavan

AU - Hansen, Bruce C.

AU - Pannasch, Sebastian

AU - Loschky, Lester C.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - Perceiving the visual world around us requires the brain to represent the features of stimuli and to categorize the stimulus based on these features. Incorrect categorization can result either from errors in visual representation or from errors in processes that lead to categorical choice. To understand the temporal relationship between the neural signatures of such systematic errors, we recorded whole-scalp magnetoencephalography (MEG) data from human subjects performing a rapid-scene categorization task. We built scene category decoders based on (1) spatiotemporally resolved neural activity, (2) spatial envelope (SpEn) image features, and (3) behavioral responses. Using confusion matrices, we tracked how well the pattern of errors from neural decoders could be explained by SpEn decoders and behavioral errors, over time and across cortical areas. Across the visual cortex and the medial temporal lobe, we found that both SpEn and behavioral errors explained unique variance in the errors of neural decoders. Critically, these effects were nearly simultaneous, and most prominent between 100 and 250 ms after stimulus onset. Thus, during rapid-scene categorization, neural processes that ultimately result in behavioral categorization are simultaneous and co-localized with neural processes underlying visual information representation.

AB - Perceiving the visual world around us requires the brain to represent the features of stimuli and to categorize the stimulus based on these features. Incorrect categorization can result either from errors in visual representation or from errors in processes that lead to categorical choice. To understand the temporal relationship between the neural signatures of such systematic errors, we recorded whole-scalp magnetoencephalography (MEG) data from human subjects performing a rapid-scene categorization task. We built scene category decoders based on (1) spatiotemporally resolved neural activity, (2) spatial envelope (SpEn) image features, and (3) behavioral responses. Using confusion matrices, we tracked how well the pattern of errors from neural decoders could be explained by SpEn decoders and behavioral errors, over time and across cortical areas. Across the visual cortex and the medial temporal lobe, we found that both SpEn and behavioral errors explained unique variance in the errors of neural decoders. Critically, these effects were nearly simultaneous, and most prominent between 100 and 250 ms after stimulus onset. Thus, during rapid-scene categorization, neural processes that ultimately result in behavioral categorization are simultaneous and co-localized with neural processes underlying visual information representation.

KW - Confusion matrices

KW - MEG

KW - Multiple linear regression

KW - Multivariate decoding

KW - Scene gist

KW - Spatial envelope

KW - Timing of visual perception

UR - http://www.scopus.com/inward/record.url?scp=84963975999&partnerID=8YFLogxK

U2 - 10.1016/j.neuroimage.2016.03.027

DO - 10.1016/j.neuroimage.2016.03.027

M3 - Article

VL - 134

SP - 295

EP - 304

JO - NeuroImage

JF - NeuroImage

SN - 1053-8119

ER -

ID: 3051997