Alle Publikationen
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2013
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(2013): Being and feeling in sync with an adaptive virtual partner. Brain mechanisms underlying dynamic cooperativity. In: Cerebral cortex (New York, N.Y. : 1991) 23 (11), S. 2592-2600. DOI: 10.1093/cercor/bhs243
DOI: http://www.ncbi.nlm.nih.gov/pubmed/22892422 Abstract: Cooperation is intrinsic to the human ability to work together toward common goals, and depends on sensing and reacting to dynamically changing relationships between coacting partners. Using functional magnetic resonance imaging (fMRI) and a paradigm in which an adaptive pacing signal simulates a virtual partner, we examined the neural substrates underlying dynamic joint action. A single parameter controlled the degree to which the virtual partner adapted its behavior in relation to participant taps, thus simulating varying degrees of cooperativity. Analyses of fMRI data using objective and subjective measures of synchronization quality found the relative balance of activity in two distinct neural networks to depend on the degree of the virtual partner's adaptivity. At lower degrees of adaptivity, when the virtual partner was easier to synchronize with, cortical midline structures were activated in conjunction with premotor areas, suggesting a link between the action and socio-affective components of cooperation. By contrast, right lateral prefrontal areas associated with central executive control processes were recruited during more cognitively challenging interactions while synchronizing with an overly adaptive virtual partner. Together, the reduced adaptive sensorimotor synchronization paradigm and pattern of results illuminate neural mechanisms that may underlie the socio-emotional consequences of different degrees of entrainment success.
Keywords: Acoustic Stimulation, adaptation, Adult, Anpassung, BRAIN, Brain Mapping, Cooperative Behavior, Emotions, Female, Gehirnfunktion, Humans, Kognitionswissenschaft/Social Sciences/Humanities, Kognitive Skills/Social Cognition, Kooperation, Magnetic Resonance Imaging, Male, Photic Stimulation, physiology, Psychological, Sensory Feedback, User-Computer Interface, Young Adult 2011
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(2011): Dissociable brain mechanisms for processing social exclusion and rule violation. In: NEUROIMAGE 54 (3), S. 2462-2471. DOI: 10.1016/j.neuroimage.2010.10.049
DOI: http://www.ncbi.nlm.nih.gov/pubmed/20974272 Abstract: Social exclusion inherently involves an element of expectancy violation, in that we expect other people to follow the unwritten rule to include us in social interactions. In this functional magnetic resonance imaging (fMRI) study, we employed a unique modification of an interactive virtual ball-tossing game called "Cyberball" (Williams et al., 2000) and a novel paradigm called "Cybershape," in which rules are broken in the absence of social exclusion, to dissociate brain regions that process social exclusion from rule violations more generally. Our Cyberball game employed an alternating block design and removed evoked responses to events when the participant was throwing the ball in inclusion to make this condition comparable to exclusion, where participants did not throw. With these modifications, we replicated prior findings of ventral anterior cingulate cortex (vACC), insula, and posterior cingulate cortex activity evoked by social exclusion relative to inclusion. We also identified exclusion-evoked activity in the hippocampi, left ventrolateral prefrontal cortex, and left middle temporal gyrus. Comparing social exclusion and rule violation revealed a functional dissociation in the active neural systems as well as differential functional connectivity with vACC. Some overlap was observed in regions differentially modulated by social exclusion and rule violation, including the vACC and lateral parietal cortex. These overlapping brain regions showed different activation during social exclusion compared to rule violation, each relative to fair play. Comparing activation patterns to social exclusion and rule violation allowed for the dissociation of brain regions involved in the experience of exclusion versus expectancy violation. zitiert von 96
Keywords: Brain/physiology, Cerebral Cortex/physiology, Computer Graphics, Data Interpretation, Statistical, Female, Games, Experimental, Humans, Image Processing, Computer-Assisted, Interpersonal Relations, Magnetic Resonance Imaging, Male, Nerve Net/physiology, Neural Pathways/physiology, Neurowissenschaften, Psychophysics, Rejection (Psychology), rules, science direct, Social Environment, Social Perception, Young Adult 2010
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(2010): Cross-cultural reading the mind in the eyes: an fMRI investigation. In: Journal of cognitive neuroscience 22 (1), S. 97-108. DOI: 10.1162/jocn.2009.21187
DOI: https://doi.org/10.1162/jocn.2009.21187 Abstract: The ability to infer others' thoughts, intentions, and feelings is regarded as uniquely human. Over the last few decades, this remarkable ability has captivated the attention of philosophers, primatologists, clinical and developmental psychologists, anthropologists, social psychologists, and cognitive neuroscientists. Most would agree that the capacity to reason about others' mental states is innately prepared, essential for successful human social interaction. Whether this ability is culturally tuned, however, remains entirely uncharted on both the behavioral and neural levels. Here we provide the first behavioral and neural evidence for an intracultural advantage (better performance for same- vs. other-culture) in mental state decoding in a sample of native Japanese and white American participants. We examined the neural correlates of this intracultural advantage using fMRI, revealing greater bilateral posterior superior temporal sulci recruitment during same- versus other-culture mental state decoding in both cultural groups. These findings offer preliminary support for cultural consistency in the neurological architecture subserving high-level mental state reasoning, as well as its differential recruitment based on cultural group membership.
Keywords: Adolescent, Adult, Asian Continental Ancestry Group, Brain Mapping, Cross-Cultural Comparison, European Continental Ancestry Group, Eye, Female, Humans, Magnetic Resonance Imaging, Male, Prefrontal Cortex/anatomy & histology/physiology, Reaction Time/physiology, Social Perception, Temporal Lobe/anatomy & histology/physiology, Theory of Mind/physiology, Young Adult 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 2004
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(2004): Thinking the voice: neural correlates of voice perception. In: Trends in cognitive sciences 8 (3), S. 129-135. DOI: 10.1016/j.tics.2004.01.008
DOI: https://doi.org/10.1016/j.tics.2004.01.008 Abstract: The human voice is the carrier of speech, but also an "auditory face" that conveys important affective and identity information. Little is known about the neural bases of our abilities to perceive such paralinguistic information in voice. Results from recent neuroimaging studies suggest that the different types of vocal information could be processed in partially dissociated functional pathways, and support a neurocognitive model of voice perception largely similar to that proposed for face perception.
Keywords: Auditory Perception/physiology, Brain Mapping, Cerebral Cortex/physiology, Concept Formation/physiology, Humans, Image Processing, Computer-Assisted, Imaging, Three-Dimensional, Interpersonal Relations, Magnetic Resonance Imaging, Positron-Emission Tomography, Sound Spectrography, Speech Acoustics, Speech Perception/physiology, VOICE
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