Rapid emotional processing in relation to trauma-related symptoms as revealed by magnetic source imaging
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Zusammenfassung
Background
Traumatic stress leads to functional reorganization in the brain and may trigger an alarm response. However, when the traumatic event produces severe helplessness, the predominant peri-traumatic response may instead be marked by a dissociative shutdown reaction. The neural correlates of this dissociative shutdown were investigated by presenting rapidly presented affective pictures to female participants with posttraumatic stress disorder (PTSD), and comparing responses to a Non-PTSD control group.
Methods
Event-related-magnetic-fields were recorded during rapid visual serial presentation of emotionally arousing stimuli (unpleasant or pleasant), which alternated with pictures with low affective content (neutral). Neural sources, based on the L2-surface-minimum-norm, correlated with the severity of the symptom clusters: PTSD, depression and shutdown dissociation.
Results
For the early cortical response (60 to 110 ms), dissociation and PTSD symptom severity show similar spatial distributions of correlates for unpleasant stimuli. Cortical networks that could be involved in the relationships seem to be widespread.
Conclusion
We conclude that shutdown dissociation, PTSD and depression all have distinct effects on early processing of emotional stimuli.
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SCHALINSKI, Inga, James MORAN, Maggie SCHAUER, Thomas ELBERT, 2014. Rapid emotional processing in relation to trauma-related symptoms as revealed by magnetic source imaging. In: BMC Psychiatry. 2014, 14(1), 193. eISSN 1471-244X. Available under: doi: 10.1186/1471-244X-14-193BibTex
@article{Schalinski2014Rapid-28665,
year={2014},
doi={10.1186/1471-244X-14-193},
title={Rapid emotional processing in relation to trauma-related symptoms as revealed by magnetic source imaging},
number={1},
volume={14},
journal={BMC Psychiatry},
author={Schalinski, Inga and Moran, James and Schauer, Maggie and Elbert, Thomas},
note={Article Number: 193}
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