Alle Publikationen
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2013
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(2013): Why are you looking like that? How the context influences evaluation and processing of human faces. In: Social cognitive and affective neuroscience 8 (4), S. 438-445. DOI: 10.1093/scan/nss013
DOI: http://www.ncbi.nlm.nih.gov/pubmed/22287265 Abstract: Perception and evaluation of facial expressions are known to be heavily modulated by emotional features of contextual information. Such contextual effects, however, might also be driven by non-emotional aspects of contextual information, an interaction of emotional and non-emotional factors, and by the observers' inherent traits. Therefore, we sought to assess whether contextual information about self-reference in addition to information about valence influences the evaluation and neural processing of neutral faces. Furthermore, we investigated whether social anxiety moderates these effects. In the present functional magnetic resonance imaging (fMRI) study, participants viewed neutral facial expressions preceded by a contextual sentence conveying either positive or negative evaluations about the participant or about somebody else. Contextual influences were reflected in rating and fMRI measures, with strong effects of self-reference on brain activity in the medial prefrontal cortex and right fusiform gyrus. Additionally, social anxiety strongly affected the response to faces conveying negative, self-related evaluations as revealed by the participants' rating patterns and brain activity in cortical midline structures and regions of interest in the left and right middle frontal gyrus. These results suggest that face perception and processing are highly individual processes influenced by emotional and non-emotional aspects of contextual information and further modulated by individual personality traits. zitiert von 56
Keywords: Affective Valence, Amygdala, Brain Mapping, Brain/physiology, Cerebral Blood Flow, Context, Emotions/physiology, Face Perception, Face/physiology, Facial Expression, FACIAL EXPRESSIONS, Female, Functional Magnetic Resonance Imaging, Fusiform Gyrus, Humans, Magnetic Resonance Imaging/methods, Male, Neuroanatomy, Neurowissenschaften, Pattern Recognition, Visual/physiology, Perception/physiology, Personality Traits, Photic Stimulation/methods, Self Reference, social anxiety 2009
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(2009): Is family special to the brain? An event-related fMRI study of familiar, familial, and self-face recognition. In: Neuropsychologia 47 (3), S. 849-858. DOI: 10.1016/j.neuropsychologia.2008.12.027
DOI: http://www.ncbi.nlm.nih.gov/pubmed/19159636 Abstract: The face-processing network has evolved to respond differentially to different classes of faces depending on their relevance to the perceiver. For example, self-, familiar, and unknown faces are associated with activation in different neural substrates. Family should represent a special class of face stimuli that is of high relevance to individuals, because incorrect assignment of kinship can have dire consequences (e.g., incest, cuckoldry). Therefore evolution should have favored redundant mechanisms for detection of kin. We used fMRI to investigate the neural substrates associated with viewing faces of kin compared to other classes of faces (e.g., self-face, familiar face, and unknown face), and to examine the degree to which self-facial resemblance activated similar neural substrates. Contrasting kin faces with unknown faces activated substrates associated with self-face recognition, while comparing kin faces to friend faces activated posterior cingulate and cuneus. Similar posterior medial substrates were recruited when contrasting self-resembling faces with morphed faces of kin, suggesting these regions potentially represent computational processing about facial familiarity and identity. On the other hand, discrimination of self-resembling faces from familiar morphs activated anterior medial substrates (anterior cingulate cortex, ACC, medial prefrontal cortex, MPFC). These findings, and a region of interest (ROI) analysis, highlight the role of the extended face-processing network for discrimination of kin from familiar non-kin members of one's social group based on self-referent phenotypic cues.
Keywords: Adult, Bekanntheitsgrad, Brain/anatomy & histology/physiology, Discrimination (Psychology)/physiology, Face, familiarity, Female, Gesichtserkennung, Gesichtszüge, Gyrus Cinguli/physiology, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Middle Aged, Neurowissenschaften, Pattern Recognition, Visual/physiology, Prefrontal Cortex/physiology, Visual Perception/physiology, Young Adult 2005
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(2005): Understanding the recognition of facial identity and facial expression. In: Nature reviews. Neuroscience 6 (8), S. 641-651. DOI: 10.1038/nrn1724
DOI: https://doi.org/10.1038/nrn1724 Abstract: Faces convey a wealth of social signals. A dominant view in face-perception research has been that the recognition of facial identity and facial expression involves separable visual pathways at the functional and neural levels, and data from experimental, neuropsychological, functional imaging and cell-recording studies are commonly interpreted within this framework. However, the existing evidence supports this model less strongly than is often assumed. Alongside this two-pathway framework, other possible models of facial identity and expression recognition, including one that has emerged from principal component analysis techniques, should be considered.
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