Oscillatory MEG gamma band activity dissociates perceptual and conceptual aspects of visual object processing: a combined repetition/conceptual priming study.
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Oscillatory MEG gamma band activity dissociates perceptual and conceptual aspects of visual object processing: a combined repetition/conceptual priming study. / Friese, Uwe; Supp, Gernot; Hipp, Jörg; Engel, Andreas K.; Gruber, Thomas.
in: NEUROIMAGE, Jahrgang 59, Nr. 1, 1, 02.01.2012, S. 861-871.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Oscillatory MEG gamma band activity dissociates perceptual and conceptual aspects of visual object processing: a combined repetition/conceptual priming study.
AU - Friese, Uwe
AU - Supp, Gernot
AU - Hipp, Jörg
AU - Engel, Andreas K.
AU - Gruber, Thomas
N1 - Copyright © 2011 Elsevier Inc. All rights reserved.
PY - 2012/1/2
Y1 - 2012/1/2
N2 - We used a combined repetition/conceptual priming task to investigate attenuations of induced gamma-band activity (iGBA) due to prior experience. We hypothesized that distinguishable iGBA suppression effects can be related to the processing of (a) perceptual aspects, and (b) conceptual aspects of cortical object representations. Participants were asked to perform a semantic classification task with pictures of real world objects and their semantically corresponding words, using a design that isolated distinct levels of the neural suppression effect. By means of volumetric source analysis we located stimulus domain-specific iGBA repetition suppression effects (60-90 Hz) in temporal, parietal, and occipital areas of the human cortex. In contrast, domain-unspecific iGBA repetition suppression, corresponding to conceptual priming, was restricted to left temporal brain regions. We propose that the selective involvement of left temporal areas points to the activation of conceptual representations, whereas more posterior temporal, parietal, and occipital areas probably reflect perceptual aspects of higher-order visual object processing.
AB - We used a combined repetition/conceptual priming task to investigate attenuations of induced gamma-band activity (iGBA) due to prior experience. We hypothesized that distinguishable iGBA suppression effects can be related to the processing of (a) perceptual aspects, and (b) conceptual aspects of cortical object representations. Participants were asked to perform a semantic classification task with pictures of real world objects and their semantically corresponding words, using a design that isolated distinct levels of the neural suppression effect. By means of volumetric source analysis we located stimulus domain-specific iGBA repetition suppression effects (60-90 Hz) in temporal, parietal, and occipital areas of the human cortex. In contrast, domain-unspecific iGBA repetition suppression, corresponding to conceptual priming, was restricted to left temporal brain regions. We propose that the selective involvement of left temporal areas points to the activation of conceptual representations, whereas more posterior temporal, parietal, and occipital areas probably reflect perceptual aspects of higher-order visual object processing.
KW - Adult
KW - Humans
KW - Male
KW - Female
KW - Signal Processing, Computer-Assisted
KW - Brain Mapping
KW - Visual Perception/physiology
KW - Magnetoencephalography
KW - Temporal Lobe/physiology
KW - Adult
KW - Humans
KW - Male
KW - Female
KW - Signal Processing, Computer-Assisted
KW - Brain Mapping
KW - Visual Perception/physiology
KW - Magnetoencephalography
KW - Temporal Lobe/physiology
U2 - 10.1016/j.neuroimage.2011.07.073
DO - 10.1016/j.neuroimage.2011.07.073
M3 - SCORING: Journal article
C2 - 21835246
VL - 59
SP - 861
EP - 871
JO - NEUROIMAGE
JF - NEUROIMAGE
SN - 1053-8119
IS - 1
M1 - 1
ER -
