G Sammer

Summary

Affiliation: University of Giessen
Country: Germany

Publications

  1. ncbi request reprint Working memory load and EEG-dynamics as revealed by point correlation dimension analysis
    G Sammer
    Institute of Psychology, Justus Liebig University of Giessen, Germany
    Int J Psychophysiol 34:89-101. 1999
  2. doi request reprint Evaluation of methods to predict early long-term neurobehavioral outcome after coronary artery bypass grafting
    Tibo Gerriets
    Department of Neurology, Justus Liebig University, Giessen, Germany
    Am J Cardiol 105:1095-101. 2010
  3. ncbi request reprint Relationship between regional hemodynamic activity and simultaneously recorded EEG-theta associated with mental arithmetic-induced workload
    Gebhard Sammer
    Bender Institute of Neuroimaging, Justus Liebig University, Giessen, Germany
    Hum Brain Mapp 28:793-803. 2007
  4. ncbi request reprint Training of executive functions in Parkinson's disease
    Gebhard Sammer
    Department of Psychology, Justus Liebig University of Giessen, Germany
    J Neurol Sci 248:115-9. 2006
  5. ncbi request reprint Acquisition of typical EEG waveforms during fMRI: SSVEP, LRP, and frontal theta
    Gebhard Sammer
    Bender Institute of Neuroimaging, University of Giessen, Otto Behaghel Str 10F, D 35394 Giessen, Germany
    Neuroimage 24:1012-24. 2005
  6. doi request reprint Functional correlates of distractor suppression during spatial working memory encoding
    M Toepper
    Bender Institute of Neuroimaging BION, Justus Liebig University of Giessen, Giessen, Germany
    Neuroscience 165:1244-53. 2010
  7. doi request reprint Neural correlates of disgust- and fear-conditioned responses
    T Klucken
    Bender Institute of Neuroimaging, Justus Liebig University Giessen, Germany
    Neuroscience 201:209-18. 2012
  8. doi request reprint Objective measurement of motor activity during cognitive performance in adults with attention-deficit/hyperactivity disorder
    Stefanie Lis
    Centre for Psychiatry, Justus Liebig University Giessen, Giessen, Germany
    Acta Psychiatr Scand 122:285-94. 2010
  9. ncbi request reprint The insula is not specifically involved in disgust processing: an fMRI study
    A Schienle
    Department of Clinical and Physiological Psychology, University of Giessen, Otto Behaghel Str 10, 35394 Giessen, Germany
    Neuroreport 13:2023-6. 2002
  10. ncbi request reprint Psychobiology of altered states of consciousness
    Dieter Vaitl
    Center for Psychobiology and Behavioral Medicine, Department of Psychology, University of Giessen, Giessen, Germany
    Psychol Bull 131:98-127. 2005

Detail Information

Publications18

  1. ncbi request reprint Working memory load and EEG-dynamics as revealed by point correlation dimension analysis
    G 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...
  2. doi request reprint Evaluation of methods to predict early long-term neurobehavioral outcome after coronary artery bypass grafting
    Tibo 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...
  3. ncbi request reprint Relationship between regional hemodynamic activity and simultaneously recorded EEG-theta associated with mental arithmetic-induced workload
    Gebhard 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...
  4. ncbi request reprint Training of executive functions in Parkinson's disease
    Gebhard 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...
  5. ncbi request reprint Acquisition of typical EEG waveforms during fMRI: SSVEP, LRP, and frontal theta
    Gebhard 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...
  6. doi request reprint Functional correlates of distractor suppression during spatial working memory encoding
    M 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...
  7. doi request reprint Neural correlates of disgust- and fear-conditioned responses
    T 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...
  8. doi request reprint Objective measurement of motor activity during cognitive performance in adults with attention-deficit/hyperactivity disorder
    Stefanie 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)...
  9. ncbi request reprint The insula is not specifically involved in disgust processing: an fMRI study
    A 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...
  10. ncbi request reprint Psychobiology of altered states of consciousness
    Dieter 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...
  11. doi request reprint Synchronized measurement of simultaneous EEG-fMRI: a simulation study
    Helge 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...
  12. ncbi request reprint Distinct mechanisms of altered brain activation in patients with multiple sclerosis
    Katrin 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...
  13. ncbi request reprint Hemodynamic responses to fear and disgust-inducing pictures: an fMRI study
    Rudolf 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...
  14. ncbi request reprint Hemodynamic effects of negative emotional pictures - a test-retest analysis
    Rudolf 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...
  15. ncbi request reprint Evidence for a direct association between cortical atrophy and cognitive impairment in relapsing-remitting MS
    Katrin 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...
  16. ncbi request reprint Erotic and disgust-inducing pictures--differences in the hemodynamic responses of the brain
    Rudolf 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...
  17. ncbi request reprint Anticipation of reward in a nonaversive differential conditioning paradigm and the brain reward system: an event-related fMRI study
    Peter 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)...
  18. ncbi request reprint Utilizing the ventriloquism-effect to investigate audio-visual binding
    M 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...