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5. Chronometric features of processing unpleasant stimuli: a functional MRI-based transcranial magnetic stimulation study

Author

Lutz Jäncke, Tina Kaffenberger, Thomas Baumgartner, Uwe Herwig, Susan Koeneke, University of Zurich, and Herwig, Uwe

Subjects
Adult, Male, medicine.medical_treatment, media_common.quotation_subject, Emotions, 610 Medicine & health, Emotional processing, 10056 Clinic for Clinical and Social Psychiatry Zurich West (former), 050105 experimental psychology, 03 medical and health sciences, 0302 clinical medicine, Perception, medicine, Humans, 0501 psychology and cognitive sciences, media_common, Brain Mapping, 10093 Institute of Psychology, General Neuroscience, Left intraparietal sulcus, 05 social sciences, Parietal lobe, Brain, 2800 General Neuroscience, Magnetic Resonance Imaging, Transcranial Magnetic Stimulation, Transcranial magnetic stimulation, Functional imaging, Dorsolateral prefrontal cortex, medicine.anatomical_structure, Female, Psychology, 150 Psychology, Neuroscience, 030217 neurology & neurosurgery, Cognitive load, Photic Stimulation
Abstract

The quick identification of potentially threatening events is a crucial cognitive capacity to survive in a changing environment. Previous functional MRI data revealed the right dorsolateral prefrontal cortex and the region of the left intraparietal sulcus (IPS) to be involved in the perception of emotionally negative stimuli. For assessing chronometric aspects of emotion processing, we applied transcranial magnetic stimulation above these areas at different times after negative and neutral picture presentation. An interference with emotion processing was found with transcranial magnetic stimulation above the dorsolateral prefrontal cortex 200-300 ms and above the left intraparietal sulcus 240/260 ms after negative stimuli. The data suggest a parallel and conjoint involvement of prefrontal and parietal areas for the identification of emotionally negative stimuli.

Published
2008
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