Research Topics
| G SammerSummaryAffiliation: University of Giessen Country: Germany Publications
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Detail Information
Publications
Working memory load and EEG-dynamics as revealed by point correlation dimension analysisG Sammer
Institute of Psychology, Justus Liebig University of Giessen, Germany
Int J Psychophysiol 34:89-101. 1999..From the results it is proposed that this procedure might offer an approach for EEG analysis, where the EEG-epochs are of short duration and non-stationary data are to be expected...- Relationship between regional hemodynamic activity and simultaneously recorded EEG-theta associated with mental arithmetic-induced workloadGebhard Sammer
Bender Institute of Neuroimaging, Justus Liebig University, Giessen, Germany
Hum Brain Mapp 28:793-803. 2007..This binding process may form the source of surface-recorded EEG theta... - Training of executive functions in Parkinson's diseaseGebhard Sammer
Department of Psychology, Justus Liebig University of Giessen, Germany
J Neurol Sci 248:115-9. 2006..Thus, PD-patients might benefit from a short-term cognitive executive function training program that is tailored to the individual patient's needs... - Acquisition of typical EEG waveforms during fMRI: SSVEP, LRP, and frontal thetaGebhard Sammer
Bender Institute of Neuroimaging, University of Giessen, Otto Behaghel Str 10F, D 35394 Giessen, Germany
Neuroimage 24:1012-24. 2005..The source of these differences requires further exploration. The high concordance of activation patterns with published results demonstrates that EPI-images could be acquired during EEG recording without significant distortion... 
Functional correlates of distractor suppression during spatial working memory encodingM Toepper
Bender Institute of Neuroimaging BION, Justus Liebig University of Giessen, Giessen, Germany
Neuroscience 165:1244-53. 2010..Furthermore, our findings are in line with the processing model of a functional dorsolateral-ventrolateral prefrontal cortex organization...- Neural correlates of disgust- and fear-conditioned responsesT Klucken
Bender Institute of Neuroimaging, Justus Liebig University Giessen, Germany
Neuroscience 201:209-18. 2012..Finally, the findings regarding disgust sensitivity are discussed with respect to vulnerability factors for certain psychiatric disorders... - Objective measurement of motor activity during cognitive performance in adults with attention-deficit/hyperactivity disorderStefanie Lis
Centre for Psychiatry, Justus Liebig University Giessen, Giessen, Germany
Acta Psychiatr Scand 122:285-94. 2010..This study investigates whether hyperactivity, i.e. an increased level of motor activity, can be observed in adults with attention-deficit/hyperactivity disorder (ADHD)... - The insula is not specifically involved in disgust processing: an fMRI studyA Schienle
Department of Clinical and Physiological Psychology, University of Giessen, Otto Behaghel Str 10, 35394 Giessen, Germany
Neuroreport 13:2023-6. 2002..Since during the fear condition the insula was also involved, our findings do not fit the idea of the insula as a specific disgust processor... - Psychobiology of altered states of consciousnessDieter Vaitl
Center for Psychobiology and Behavioral Medicine, Department of Psychology, University of Giessen, Giessen, Germany
Psychol Bull 131:98-127. 2005..Besides these severe alterations, environmental stimuli, mental practices, and techniques of self-control can also temporarily alter brain functioning and conscious experience... - Synchronized measurement of simultaneous EEG-fMRI: a simulation studyHelge Gebhardt
Bender Institute of Neuroimaging, Justus Liebig University, Otto Behaghel Strasse 10H, 35394 Giessen, Germany
Clin Neurophysiol 119:2703-11. 2008..Recently, it has been shown that synchronizing the EEG-amplifier clock to the MR-scanner control-device clock improves artifact reduction by subtraction... - Distinct mechanisms of altered brain activation in patients with multiple sclerosisKatrin Morgen
Department of Neurology, Giessen University, Am Steg 14, 35385 Giessen, Germany
Neuroimage 37:937-46. 2007..The current study provides evidence that altered brain activation in MS patients has two distinct components, one related to compensatory processes and one to neural inefficiency associated with tissue damage... - Hemodynamic responses to fear and disgust-inducing pictures: an fMRI studyRudolf Stark
Department of Clinical and Physiological Psychology, Bender Institute of Neuroimaging, Justus Liebig University of Giessen, Otto Behaghel Str 10, 35394, Giessen, Germany
Int J Psychophysiol 50:225-34. 2003..Thus, our data are in contrast with the idea of highly emotion-specific brain structures and rather suggest the existence of a common affective circuit... - Hemodynamic effects of negative emotional pictures - a test-retest analysisRudolf Stark
Department of Clinical and Physiological Psychology, Justus Liebig University of Giessen, Giessen, Germany
Neuropsychobiology 50:108-18. 2004..An additional analysis, which compared the emotion-related activation patterns during the two presentations, showed that the responses to the fear-inducing pictures were more stable than the responses to the disgust-inducing ones... - Evidence for a direct association between cortical atrophy and cognitive impairment in relapsing-remitting MSKatrin Morgen
Department of Neurology, University of Giessen, Germany
Neuroimage 30:891-8. 2006..These findings indicate that MS-related deficits in cognition are closely associated with cortical atrophy... - Erotic and disgust-inducing pictures--differences in the hemodynamic responses of the brainRudolf Stark
Department of Clinical and Physiological Psychology, Justus Liebig University of Giessen, Otto Behaghel Str 10, 35394 Giessen, Germany
Biol Psychol 70:19-29. 2005..The ventral striatum was specifically activated when subjects saw highly sexually arousing pictures. This indicates the involvement of the human reward system during the processing of visual erotica... - Anticipation of reward in a nonaversive differential conditioning paradigm and the brain reward system: an event-related fMRI studyPeter Kirsch
Bender Institute of Neuroimaging and Department of Clinical and Physiological Psychology, Justus Liebig University, Giessen, Germany
Neuroimage 20:1086-95. 2003..The results are interpreted as reflecting the motivation-dependent reactivity of the brain reward system with highly motivating stimuli (monetary reward) leading to a stronger activation than those less motivating ones (verbal reward)... - Evaluation of methods to predict early long-term neurobehavioral outcome after coronary artery bypass graftingTibo Gerriets
Department of Neurology, Justus Liebig University, Giessen, Germany
Am J Cardiol 105:1095-101. 2010..In conclusion, the results show that in contrast to biomarkers, DWI, age, or intraoperative variables, early neuropsychological bedside testing predicts long-term POCD after CABG with acceptable accuracy... - Utilizing the ventriloquism-effect to investigate audio-visual bindingM Bischoff
Bender Institute of Neuroimaging and Department of Clinical and Physiological Psychology, Justus Liebig University, Giessen, Germany
Neuropsychologia 45:578-86. 2007..Implementing the ventriloquism-effect allows us to relate these activations to consciousness-related processes, which probably are different from stimulus-driven multisensory integration in subcortical areas...