Emotion regulation and trait anxiety are predicted by the microstructure of fibers between amygdala and prefrontal cortex
| Autor: | Harald Kugel, Pienie Zwitserlood, Peter Zwanzger, Annuschka Eden, Christian Dobel, Inga Laeger, Alfred Anwander, Jan Schreiber, Katharina Keuper |
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| Rok vydání: | 2015 |
| Předmět: |
Adult
Male Internal capsule Emotions Prefrontal Cortex Anxiety Amygdala Lateralization of brain function White matter Young Adult Neural Pathways medicine Image Processing Computer-Assisted Humans Prefrontal cortex Anterior cingulate cortex Brain Mapping General Neuroscience Fornix Articles White Matter medicine.anatomical_structure Diffusion Tensor Imaging nervous system Anisotropy Regression Analysis Orbitofrontal cortex Female Psychology Neuroscience |
| Zdroj: | The Journal of Neuroscience |
| ISSN: | 1529-2401 |
| Popis: | Diffusion tensor imaging revealed that trait anxiety predicts the microstructural properties of a prespecified fiber tract between the amygdala and the perigenual anterior cingulate cortex. Besides this particular pathway, it is likely that other pathways are also affected. We investigated white matter differences in persons featuring an anxious or a nonanxious personality, taking into account all potential pathway connections between amygdala and anxiety-related regions of the prefrontal cortex (PFC). Diffusion-weighted images, measures of trait anxiety and of reappraisal use (an effective emotion-regulation style), were collected in 48 females. With probabilistic tractography, pathways between the amygdala and the dorsolateral PFC, dorsomedial PFC, ventromedial PFC, and orbitofrontal cortex (OFC) were delineated. The resulting network showed a direct ventral connection between amygdala and PFC and a second limbic connection following the fornix and the anterior limb of the internal capsule. Reappraisal use predicted the microstructure of pathways to all calculated PFC regions in the left hemisphere, indicating stronger pathways for persons with high reappraisal use. Trait anxiety predicted the microstructure in pathways to the ventromedial PFC and OFC, indexing weaker connections in trait-anxious persons. These effects appeared in the right hemisphere, supporting lateralization and top-down inhibition theories of emotion processing. Whereas a specific microstructure is associated with an anxious personality, a different structure subserves emotion regulation. Both are part of a broad fiber tract network between amygdala and PFC. |
| Databáze: | OpenAIRE |
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