Early brain responses to affective faces: A simultaneous EEG-fMRI study
| Autor: | Miriam Müller-Bardorff, Thomas Straube, Maximilian Bruchmann, David Hofmann, Insa Schlossmacher, Wolfgang H. R. Miltner, Martin Mothes-Lasch, Pienie Zwitserlood |
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| Rok vydání: | 2018 |
| Předmět: |
Male
genetic structures Cognitive Neuroscience Emotions Electroencephalography EEG-fMRI Amygdala 050105 experimental psychology 03 medical and health sciences Young Adult 0302 clinical medicine Face perception medicine Image Processing Computer-Assisted Humans 0501 psychology and cognitive sciences Facial expression Brain Mapping Fusiform gyrus medicine.diagnostic_test 05 social sciences Brain Signal Processing Computer-Assisted Superior temporal sulcus Magnetic Resonance Imaging Facial Expression medicine.anatomical_structure Neurology Visual Perception Female Psychology Functional magnetic resonance imaging Neuroscience psychological phenomena and processes 030217 neurology & neurosurgery Photic Stimulation |
| Zdroj: | NeuroImage. 178 |
| ISSN: | 1095-9572 |
| Popis: | The spatio-temporal neural basis of earliest differentiation between emotional and neutral facial expressions is a matter of debate. The present study used concurrent electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) in order to investigate the ‘when’ and ‘where’ of earliest prioritization of emotional over neutral expressions. We measured event-related potentials (ERPs) and blood oxygen dependent (BOLD) signal changes in response to facial expressions of varying emotional intensity and different valence categories. Facial expressions were presented superimposed by two horizontal bars and participants engaged in a focal bars task (low load, high load), in order to manipulate the availability of attentional resources during face perception. EEG data revealed the earliest expression effects in the P1 range (76–128 ms) as a parametric function of stimulus arousal independent of load conditions. Conventional fMRI data analysis also demonstrated significant modulations as a function of stimulus arousal, independent of load, in amygdala, superior temporal sulcus, fusiform gyrus and lateral occipital cortex. Correspondingly, EEG-informed fMRI analysis revealed a significant positive correlation between single-trial P1 amplitudes and BOLD responses in amygdala and lateral posterior occipital cortex. Our results are in line with the hypothesis of the amygdala as fast responding relevance detector and corresponding effects in early visual face processing areas across facial expressions and load conditions. |
| Databáze: | OpenAIRE |
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