Morawetz, Carmen

[["dc.bibliographiccitation.firstpage","87"],["dc.bibliographiccitation.journal","Brain Research"],["dc.bibliographiccitation.lastpage","99"],["dc.bibliographiccitation.volume","1371"],["dc.contributor.author","Morawetz, Carmen"],["dc.contributor.author","Baudewig, Jürgen"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Dechent, Peter"],["dc.date.accessioned","2017-09-07T11:43:36Z"],["dc.date.available","2017-09-07T11:43:36Z"],["dc.date.issued","2011"],["dc.description.abstract","Facial emotion perception plays a fundamental role in interpersonal social interactions. Images of faces contain visual information at various spatial frequencies. The amygdala has previously been reported to be preferentially responsive to low-spatial frequency (LSF) rather than to high-spatial frequency (HSF) filtered images of faces presented at the center of the visual field. Furthermore, it has been proposed that the amygdala might be especially sensitive to affective stimuli in the periphery. In the present study we investigated the impact of spatial frequency and stimulus eccentricity on face processing in the human amygdala and fusiform gyrus using functional magnetic resonance imaging (fMRI). The spatial frequencies of pictures of fearful faces were filtered to produce images that retained only LSF or HSF information. Facial images were presented either in the left or right visual field at two different eccentricities. In contrast to previous findings, we found that the amygdala responds to LSF and HSF stimuli in a similar manner regardless of the location of the affective stimuli in the visual field. Furthermore, the fusiform gyrus did not show differential responses to spatial frequency filtered images of faces. Our findings argue against the view that LSF information plays a crucial role in the processing of facial expressions in the amygdala and of a higher sensitivity to affective stimuli in the periphery."],["dc.identifier.doi","10.1016/j.brainres.2010.10.110"],["dc.identifier.gro","3151589"],["dc.identifier.pmid","21059346"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8401"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0006-8993"],["dc.title","Effects of spatial frequency and location of fearful faces on human amygdala activity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","817"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Visual Neuroscience"],["dc.bibliographiccitation.lastpage","826"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Morawetz, Carmen"],["dc.contributor.author","Holz, Petra"],["dc.contributor.author","Baudewig, Jürgen"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Dechent, Peter"],["dc.date.accessioned","2021-06-01T10:50:25Z"],["dc.date.available","2021-06-01T10:50:25Z"],["dc.date.issued","2007"],["dc.description.abstract","Visual spatial attention has been described as a process that favors the processing of sensory information that falls into the “spotlight of attention.” Recent studies have provided support for an ability to split this attentional focus to selectively process spatially separate locations. Using functional magnetic resonance imaging, the signature for the presence of multiple spotlights is the presence of multiple retinotopically specific foci of activation in striate and extrastriate visual areas. We used this approach to investigate the presence of such separable activations as a function of the eccentricity of the spatial foci of attention. Visual stimuli consisted of letters and digits displayed in rapid serial visual presentation (RSVP). Five RSVP streams were presented simultaneously, one in the center of the visual field and one in each visual field quadrant. Subjects had to deploy their attention either to a single peripheral location or two non-contiguous regions performing a match-mismatch judgment. The results show that dividing attention leads to multiple spotlights of attention for central as well as more peripheral locations of the visual field. However, depending on the exact location and width of the attentional spotlights, resulting activation maps might reveal merged activation patterns even in the presence of distinct attentional spotlights."],["dc.identifier.doi","10.1017/S0952523807070745"],["dc.identifier.gro","3151564"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/86652"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.eissn","1469-8714"],["dc.relation.issn","0952-5238"],["dc.title","Split of attentional resources in human visual cortex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","226"],["dc.bibliographiccitation.journal","Frontiers in Human Neuroscience"],["dc.bibliographiccitation.volume","4"],["dc.contributor.affiliation","Morawetz, Carmen;"],["dc.contributor.affiliation","Baudewig, Juergen;"],["dc.contributor.affiliation","Treue, Stefan;"],["dc.contributor.affiliation","Dechent, Peter;"],["dc.contributor.author","Morawetz, Carmen"],["dc.contributor.author","Baudewig, Jürgen"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Dechent, Peter"],["dc.date.accessioned","2017-09-07T11:43:29Z"],["dc.date.available","2017-09-07T11:43:29Z"],["dc.date.issued","2010"],["dc.date.updated","2022-02-09T13:23:09Z"],["dc.description.abstract","Recent neuroimaging studies disagree as to whether the processing of emotion-laden visual stimuli is dependent upon the availability of attentional resources or entirely capacity-free. Two main factors have been proposed to be responsible for the discrepancies: the differences in the perceptual attentional demands of the tasks used to divert attentional resources from emotional stimuli and the spatial location of the affective stimuli in the visual field. To date, no neuroimaging report addressed these two issues in the same set of subjects. Therefore, the aim of the study was to investigate the effects of high and low attentional load as well as different stimulus locations on face processing in the amygdala using functional magnetic resonance imaging to provide further evidence for one of the two opposing theories. We were able for the first time to directly test the interaction of attentional load and spatial location. The results revealed a strong attenuation of amygdala activity when the attentional load was high. The eccentricity of the emotional stimuli did not affect responses in the amygdala and no interaction effect between attentional load and spatial location was found. We conclude that the processing of emotional stimuli in the amygdala is strongly dependent on the availability of attentional resources without a preferred processing of stimuli presented in the periphery and provide firm evidence for the concept of the attentional load theory of emotional processing in the amygdala."],["dc.identifier.doi","10.3389/fnhum.2010.00226"],["dc.identifier.eissn","1662-5161"],["dc.identifier.gro","3151558"],["dc.identifier.pmid","21160563"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9972"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8367"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Frontiers Research Foundation"],["dc.relation.issn","1662-5161"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0"],["dc.title","Diverting attention suppresses human amygdala responses to faces"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]