Matthias Gamer

Summary

Affiliation: University of Hamburg
Country: Germany

Publications

  1. doi request reprint Oxytocin specifically enhances valence-dependent parasympathetic responses
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistr 52, D 20246 Hamburg, Germany
    Psychoneuroendocrinology 37:87-93. 2012
  2. ncbi request reprint Validity of the Concealed Information Test in realistic mock crime scenarios: comment on Bradley, Malik, and Cullen
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany
    Percept Mot Skills 115:427-31. 2012
  3. pmc fMRI-activation patterns in the detection of concealed information rely on memory-related effects
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistr 52, D 20246 Hamburg, Germany
    Soc Cogn Affect Neurosci 7:506-15. 2012
  4. doi request reprint Does the Guilty Actions Test allow for differentiating guilty participants from informed innocents? A re-examination
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Int J Psychophysiol 76:19-24. 2010
  5. doi request reprint Who is looking at me? The cone of gaze widens in social phobia
    Matthias Gamer
    University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Cogn Emot 25:756-64. 2011
  6. doi request reprint Task relevance and recognition of concealed information have different influences on electrodermal activity and event-related brain potentials
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Psychophysiology 47:355-64. 2010
  7. doi request reprint Strength of memory encoding affects physiological responses in the Guilty Actions Test
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistr 52, Bldg W34, D 20246 Hamburg, Germany
    Biol Psychol 83:101-7. 2010
  8. doi request reprint Amygdala activation predicts gaze toward fearful eyes
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, D 20246 Hamburg, Germany
    J Neurosci 29:9123-6. 2009
  9. doi request reprint Combining physiological measures in the detection of concealed information
    Matthias Gamer
    University Medical Center Hamburg Eppendorf, Germany
    Physiol Behav 95:333-40. 2008
  10. doi request reprint Electrodermal and phasic heart rate responses in the Guilty Actions Test: comparing guilty examinees to informed and uninformed innocents
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany
    Int J Psychophysiol 69:61-8. 2008

Detail Information

Publications22

  1. doi request reprint Oxytocin specifically enhances valence-dependent parasympathetic responses
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistr 52, D 20246 Hamburg, Germany
    Psychoneuroendocrinology 37:87-93. 2012
    ..Findings suggest that anxiolytic effects of oxytocin are not reflected in short-term sympathetic responses and may even be a consequence of rather than a prerequisite for improved social information processing...
  2. ncbi request reprint Validity of the Concealed Information Test in realistic mock crime scenarios: comment on Bradley, Malik, and Cullen
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany
    Percept Mot Skills 115:427-31. 2012
    ..Studies from our group using naturalistic mock crime scenarios, multiple physiological response measures and improved scoring and classification techniques suggest that such a general conclusion is not warranted...
  3. pmc fMRI-activation patterns in the detection of concealed information rely on memory-related effects
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistr 52, D 20246 Hamburg, Germany
    Soc Cogn Affect Neurosci 7:506-15. 2012
    ..Moreover, the responses to probes differed substantially from targets. The observed neural response pattern seems to rely on retrieval processes that depend on the depth of processing in the encoding situation...
  4. doi request reprint Does the Guilty Actions Test allow for differentiating guilty participants from informed innocents? A re-examination
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Int J Psychophysiol 76:19-24. 2010
    ..Neither the GKT nor the GAT seems to allow for a valid differentiation of guilty participants and informed innocents when crime related knowledge is deeply encoded and participants are motivated to pass the test...
  5. doi request reprint Who is looking at me? The cone of gaze widens in social phobia
    Matthias Gamer
    University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Cogn Emot 25:756-64. 2011
    ..As this effect was found for merely virtual lookers, it seems to be a fundamental mechanism rather than a specific effect related to the fear of being observed and evaluated by others...
  6. doi request reprint Task relevance and recognition of concealed information have different influences on electrodermal activity and event-related brain potentials
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Psychophysiology 47:355-64. 2010
    ..These results suggest that the P300 mainly reflects task relevance in the given experimental setting whereas the N200 amplitude is sensitive to previously encoded information and potentially linked to response monitoring processes...
  7. doi request reprint Strength of memory encoding affects physiological responses in the Guilty Actions Test
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistr 52, Bldg W34, D 20246 Hamburg, Germany
    Biol Psychol 83:101-7. 2010
    ..These results indicate that the process of memory encoding and consolidation has significant effects on the physiological response pattern in the GAT...
  8. doi request reprint Amygdala activation predicts gaze toward fearful eyes
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, D 20246 Hamburg, Germany
    J Neurosci 29:9123-6. 2009
    ....
  9. doi request reprint Combining physiological measures in the detection of concealed information
    Matthias Gamer
    University Medical Center Hamburg Eppendorf, Germany
    Physiol Behav 95:333-40. 2008
    ..A weighted combination of these measures using a logistic regression model yielded slightly larger validity coefficients than the best single measure. These results proved to be stable across different protocols and various samples...
  10. doi request reprint Electrodermal and phasic heart rate responses in the Guilty Actions Test: comparing guilty examinees to informed and uninformed innocents
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany
    Int J Psychophysiol 69:61-8. 2008
    ..With respect to the HR data, however, no habituation was observed. Findings suggest that GAT results could not exclusively be interpreted by referring to the OR...
  11. pmc Different amygdala subregions mediate valence-related and attentional effects of oxytocin in humans
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, D 20246 Hamburg, Germany
    Proc Natl Acad Sci U S A 107:9400-5. 2010
    ..Thus, different behavioral effects of oxytocin seem to be closely related its specific modulatory influence on subregions within the human amygdala...
  12. ncbi request reprint Neurobiological mechanisms underlying the blocking effect in aversive learning
    Falk Eippert
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, 20246 Hamburg, Germany
    J Neurosci 32:13164-76. 2012
    ..Together, our findings highlight the role of predictive value in explaining amygdala responses and identify mechanisms that shape these responses in human fear conditioning...
  13. doi request reprint Don't look back in anger! Responsiveness to missed chances in successful and nonsuccessful aging
    Stefanie Brassen
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Science 336:612-4. 2012
    ..Our results suggest that disengagement from regret reflects a critical resilience factor for emotional health in older age...
  14. doi request reprint The influence of directed covert attention on emotional face processing
    Stefanie Brassen
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Neuroimage 50:545-51. 2010
    ..Attentional disengagement from the faces led to a suppression of this amygdala response and thus provides further evidence that amygdala activation depends on the focus of attention...
  15. doi request reprint Emotional arousal modulates the encoding of crime-related details and corresponding physiological responses in the Concealed Information Test
    Judith Peth
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Psychophysiology 49:381-90. 2012
    ..These findings indicate that emotional arousal might facilitate the detection of concealed information some time after a crime occurred...
  16. doi request reprint Separate amygdala subregions signal surprise and predictiveness during associative fear learning in humans
    Sabrina Boll
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Martinistrasse 52, Building W34, D 20246, Hamburg, Germany
    Eur J Neurosci 37:758-67. 2013
    ..These results extend previous findings on PH-like mechanisms in the amygdala and provide unique insights into human amygdala circuits during associative learning...
  17. doi request reprint Anterior cingulate activation is related to a positivity bias and emotional stability in successful aging
    Stefanie Brassen
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
    Biol Psychiatry 70:131-7. 2011
    ..The present study investigates the neurobiological mechanism underlying this hypothesis...
  18. doi request reprint Processing of facial expressions and their significance for the observer in subregions of the human amygdala
    Sabrina Boll
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany
    Neuroimage 56:299-306. 2011
    ....
  19. doi request reprint Fixations and eye-blinks allow for detecting concealed crime related memories
    Judith Peth
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany
    Int J Psychophysiol 88:96-103. 2013
    ..Future research should further investigate validity differences between gaze measures during a CIT and explore the underlying mechanisms...
  20. pmc P300 amplitudes in the concealed information test are less affected by depth of processing than electrodermal responses
    Matthias Gamer
    Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf Hamburg, Germany
    Front Hum Neurosci 6:308. 2012
    ..Such differentiation might be highly relevant for field applications of the CIT...
  21. ncbi request reprint Psychophysiological and vocal measures in the detection of guilty knowledge
    Matthias Gamer
    Department of Psychology, Interdisciplinary Research Group Forensic Psychophysiology, Johannes Gutenberg University Mainz, Staudingerweg 9, D 55099 Mainz, Germany
    Int J Psychophysiol 60:76-87. 2006
    ..In contrast to these results, the vocal measures provided by the computerized voice stress analysis system TrusterPro were shown to be invalid for the detection of guilty knowledge...
  22. ncbi request reprint Covariations among fMRI, skin conductance, and behavioral data during processing of concealed information
    Matthias Gamer
    Department of Psychology, Interdisciplinary Research Group Forensic Psychophysiology, Johannes Gutenberg University Mainz, Germany
    Hum Brain Mapp 28:1287-301. 2007
    ..This result provides a first link between behavioral measures, sympathetic arousal, and neural activation patterns during a GKT examination...