TY - JOUR A1 - Sepp, T. A1 - Tempel, E. A1 - Gramann, M. A1 - Nurmi, P. A1 - Haupt, Michael T1 - Studying the patterns of the universe JF - Baltic astronomy N2 - The SDSS galaxy catalog is one of the best databases for galaxy distribution studies. The SDSS DR8 data is used to construct the galaxy cluster catalog. We construct the clusters from the calculated luminosity density field and identify denser regions. Around these peak regions we construct galaxy clusters. Another interesting question in cosmology is how observable galaxy structures are connected to underlying dark matter distribution. To study this we compare the SDSS DR7 galaxy group catalog with galaxy groups obtained from the semi-analytical Millennium N-Body simulation. Specifically, we compare the group richness, virial radius, maximum separation and velocity dispersion distributions and find a relatively good agreement between the mock catalog and observations. This strongly supports the idea, that the dark matter distribution and galaxies in the semi-analytical models and observations are very closely linked. KW - galaxies: groups, clusters KW - cosmology: dark matter, large-scale structure of the Universe Y1 - 2011 SN - 1392-0049 VL - 20 IS - 2 SP - 309 EP - 312 PB - Institute of Theoretical Physics and Astronomy CY - Moletai ER - TY - JOUR A1 - Füstös, Jürgen A1 - Gramann, Klaus A1 - Herbert, Beate M. A1 - Pollatos, Olga T1 - On the embodiment of emotion regulation - interoceptive awareness facilitates reappraisal JF - Frontiers in human neuroscience N2 - The ability to cognitively regulate emotional responses to aversive events is essential for mental and physical health. One prerequisite of successful emotion regulation is the awareness of emotional states, which in turn is associated with the awareness of bodily signals [interoceptive awareness (IA)]. This study investigated the neural dynamics of reappraisal of emotional responses in 28 participants who differed with respect to IA. Electroencephalography was used to characterize the time course of emotion regulation. We found that reappraisal was accompanied by reduced arousal and significant modulation of late neural responses. What is more, higher IA facilitated downregulation of affect and was associated with more pronounced modulation of underlying neural activity. Therefore, we conclude that IA not only advances the consolidation of somatic markers required for guiding individual behaviour but also creates processing advantages in tasks referring to these bodily markers. KW - interoception KW - interoceptive awareness KW - embodied cognition KW - emotion regulation KW - reappraisal KW - evoked potentials Y1 - 2013 U6 - https://doi.org/10.1093/scan/nss089 SN - 1749-5016 SN - 1749-5024 VL - 8 IS - 8 SP - 911 EP - 917 PB - Oxford Univ. Press CY - Oxford ER - TY - JOUR A1 - Mai, Sandra A1 - Gramann, Klaus A1 - Herbert, Beate M. A1 - Friederich, Hans-Christoph A1 - Warschburger, Petra A1 - Pollatos, Olga T1 - Electrophysiological evidence for an attentional bias in processing body stimuli in bulimia nervosa JF - Biological psychology N2 - Empirical evidence suggests abnormalities in the processing of body stimuli in bulimia nervosa (BN). This study investigated central markers of processing body stimuli by means of event-related potentials in BN. EEG was recorded from 20 women with BN and 20 matched healthy controls while watching and evaluating underweight, normal and overweight female body pictures. Bulimics evaluated underweight bodies as less unpleasant and overweight bodies as bigger and more arousing. A higher P2 to overweight stimuli occurred in BN only. In contrast to controls, no N2 increase to underweight bodies was observed in BN. P3 was modulated by stimulus category only in healthy controls; late slow waves to underweight bodies were more pronounced in both groups. P2 amplitudes to overweight stimuli were correlated with drive for thinness and body dissatisfaction. We present novel support for altered perceptual and cognitive-affective processing of body images in BN on the subjective and electrophysiological level. (C) 2015 Elsevier B.V. All rights reserved. KW - Bulimia nervosa KW - Body image KW - Body stimuli KW - ERP KW - P2 KW - Slow positive wave Y1 - 2015 U6 - https://doi.org/10.1016/j.biopsycho.2015.03.013 SN - 0301-0511 SN - 1873-6246 VL - 108 SP - 105 EP - 114 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Pollatos, Olga A1 - Herbert, Beate M. A1 - Schandry, Rainer A1 - Gramann, Klaus T1 - Impaired central processing of emotional faces in anorexia nervosa N2 - OBJECTIVES: To elucidate the potential relationship between classification of emotional faces and impaired central processing in eating disorders and to investigate the potential mediatory role of alexithymia and depression in this relationship. METHODS: Visual-evoked potentials (VEPs) to emotional faces and classification performance were assessed in 12 anorexic females and matched healthy controls. RESULTS: Patients with anorexia nervosa showed no modulation of emotional face processing and displayed significantly increased N200 amplitudes in response to all emotional categories and decreased VEPs in response to unpleasant emotional faces in the P300 time range as compared with healthy controls. They also made more mistakes in emotional face recognition, in particular, for neutral, sad, and disgusted content. CONCLUSIONS: There are marked differences in evoked potentials and emotion recognition performances of patients with anorexia nervosa and controls in facial processing. Differences in brain dynamics might contribute to difficulties in the correct recognition of facially expressed emotions, deficits in social functioning, and in turn the maintenance of eating disorders. Y1 - 2008 SN - 0033-3174 ER -