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Involvement of top-down networks in the perception of facial emotions: a magnetoencephalographic investigation.
Neuroimage. 2020 Jun 22 [Online ahead of print]N

Abstract

Conscious perception of the emotional valence of faces has been proposed to involve top-down and bottom-up information processing. Yet, the underlying neuronal mechanisms of these two processes and the implementation of their cooperation is still unclear. We hypothesized that the key substrates enabling conscious perception are differential participation of top-down and bottom-up networks. Using a visual-backward-masking paradigm, we assessed the participation of bottom-up and top-down networks in 12 healthy individuals by means of magnetoencephalography (MEG). Providing visual stimulation near the perceptual threshold enabled us to compare correctly and incorrectly recognized facial emotions and assess thereby differences in top-down and bottom-up modulation of the visual information processing using coherence analysis. For correctly recognized facial emotions, we found a right-hemispheric fronto-parietal network oscillating in the high-beta and low-gamma band and exerting top-down control as determined by the causality measure of phase slope index (PSI). In contrast, incorrect recognition was associated with enhanced coupling in the gamma band between left frontal and right parietal regions. Our results indicate that the perception of emotional face stimuli relies on the right-hemispheric dominance of synchronized fronto-parietal gamma-band activity.

Authors+Show Affiliations

MEG Center, University of Tübingen, Tübingen, 72076, Germany; IMPRS-GTC, International Max-Planck Research School-Graduate Training Center for Neuroscience, Tübingen, 72074, Germany.Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, 72076, Germany.MEG Center, University of Tübingen, Tübingen, 72076, Germany.Department of Psychiatry and Division of Neuroscience, Escuela de Medicina, Pontificia, Universidad Católica de Chile, Santiago de Chile, Chile; Laboratory for Brain-Machine Interfaces and Neuromodulation, Pontificia Universidad Católica de Chile, Santiago de Chile, Chile.Department of Psychiatry and Division of Neuroscience, Escuela de Medicina, Pontificia, Universidad Católica de Chile, Santiago de Chile, Chile; Laboratory for Brain-Machine Interfaces and Neuromodulation, Pontificia Universidad Católica de Chile, Santiago de Chile, Chile; Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biology, Pontificia Universidad Católica de Chile, Santiago de Chile, Chile.MEG Center, University of Tübingen, Tübingen, 72076, Germany; CIN, Werner Reichardt Center for Integrative Neuroscience, University of Tübingen, Tübingen, 72076, Germany; CIMeC, Center for Mind/Brain Sciences, University of Trento, Rovereto, 38068, Italy; Department of Psychology and Cognitive Sciences, University of Trento, Rovereto, 38068, Italy. Electronic address: christoph.braun@uni-tuebingen.de.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32585348

Citation

Kajal, Diljit Singh, et al. "Involvement of Top-down Networks in the Perception of Facial Emotions: a Magnetoencephalographic Investigation." NeuroImage, 2020, p. 117075.
Kajal DS, Fioravanti C, Elshahabi A, et al. Involvement of top-down networks in the perception of facial emotions: a magnetoencephalographic investigation. Neuroimage. 2020.
Kajal, D. S., Fioravanti, C., Elshahabi, A., Ruiz, S., Sitaram, R., & Braun, C. (2020). Involvement of top-down networks in the perception of facial emotions: a magnetoencephalographic investigation. NeuroImage, 117075. https://doi.org/10.1016/j.neuroimage.2020.117075
Kajal DS, et al. Involvement of Top-down Networks in the Perception of Facial Emotions: a Magnetoencephalographic Investigation. Neuroimage. 2020 Jun 22;117075. PubMed PMID: 32585348.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Involvement of top-down networks in the perception of facial emotions: a magnetoencephalographic investigation. AU - Kajal,Diljit Singh, AU - Fioravanti,Chiara, AU - Elshahabi,Adham, AU - Ruiz,Sergio, AU - Sitaram,Ranganatha, AU - Braun,Christoph, Y1 - 2020/06/22/ PY - 2019/12/10/received PY - 2020/04/22/revised PY - 2020/06/17/accepted PY - 2020/6/26/entrez PY - 2020/6/26/pubmed PY - 2020/6/26/medline KW - bottom-up KW - emotion KW - gamma-band KW - global workspace theory KW - magnetoencephalography KW - network KW - perception KW - recurrent long-distance interactions KW - top-down SP - 117075 EP - 117075 JF - NeuroImage JO - Neuroimage N2 - Conscious perception of the emotional valence of faces has been proposed to involve top-down and bottom-up information processing. Yet, the underlying neuronal mechanisms of these two processes and the implementation of their cooperation is still unclear. We hypothesized that the key substrates enabling conscious perception are differential participation of top-down and bottom-up networks. Using a visual-backward-masking paradigm, we assessed the participation of bottom-up and top-down networks in 12 healthy individuals by means of magnetoencephalography (MEG). Providing visual stimulation near the perceptual threshold enabled us to compare correctly and incorrectly recognized facial emotions and assess thereby differences in top-down and bottom-up modulation of the visual information processing using coherence analysis. For correctly recognized facial emotions, we found a right-hemispheric fronto-parietal network oscillating in the high-beta and low-gamma band and exerting top-down control as determined by the causality measure of phase slope index (PSI). In contrast, incorrect recognition was associated with enhanced coupling in the gamma band between left frontal and right parietal regions. Our results indicate that the perception of emotional face stimuli relies on the right-hemispheric dominance of synchronized fronto-parietal gamma-band activity. SN - 1095-9572 UR - https://www.unboundmedicine.com/medline/citation/32585348/Involvement_of_top-down_networks_in_the_perception_of_facial_emotions:_a_magnetoencephalographic_investigation L2 - https://linkinghub.elsevier.com/retrieve/pii/S1053-8119(20)30561-9 DB - PRIME DP - Unbound Medicine ER -
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