Alpha oscillation neurofeedback modulates amygdala complex connectivity and arousal in posttraumatic stress disorder

• Verfasst von: Nicholson, Andrew A. [VerfasserIn]
• Verfasst von: Ros, Tomas [VerfasserIn]
• Verfasst von: Frewen, Paul A. [VerfasserIn]
• Verfasst von: Densmore, Maria [VerfasserIn]
• Verfasst von: Théberge, Jean [VerfasserIn]
• Verfasst von: Klütsch, Rosemarie Christine [VerfasserIn]
• Verfasst von: Jetly, Rakesh [VerfasserIn]
• Verfasst von: Lanius, Ruth A. [VerfasserIn]
• Titel: Alpha oscillation neurofeedback modulates amygdala complex connectivity and arousal in posttraumatic stress disorder
• Verf.angabe: Andrew A. Nicholson, Tomas Ros, Paul A. Frewen, Maria Densmore, Jean Théberge, Rosemarie C. Kluetsch, Rakesh Jetly, Ruth A. Lanius
• E-Jahr: 2016
• Jahr: 14 July 2016
• Umfang: 11 S.
• Fussnoten: Gesehen am 26.01.2021
• Titel Quelle: Enthalten in: NeuroImage: Clinical
• Ort Quelle: [Amsterdam u.a.] : Elsevier, 2012
• Jahr Quelle: 2016
• Band/Heft Quelle: 12(2016), Seite 506-516
• ISSN Quelle: 2213-1582
• DOI: doi:10.1016/j.nicl.2016.07.006
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Amygdala
• Sach-SW: Electroencephalogram
• Sach-SW: Functional connectivity
• Sach-SW: Functional MRI
• Sach-SW: Neurofeedback
• Sach-SW: Posttraumatic stress disorder
• K10plus-PPN: 1745694765

Abstract

Objective - Electroencephalogram (EEG) neurofeedback aimed at reducing the amplitude of the alpha-rhythm has been shown to alter neural networks associated with posttraumatic stress disorder (PTSD), leading to symptom alleviation. Critically, the amygdala is thought to be one of the central brain regions mediating PTSD symptoms. In the current study, we compare directly patterns of amygdala complex connectivity using fMRI, before and after EEG neurofeedback, in order to observe subcortical mechanisms associated with behavioural and alpha oscillatory changes among patients. - Method - We examined basolateral (BLA), centromedial (CMA), and superficial (SFA) amygdala complex resting-state functional connectivity using a seed-based approach via SPM Anatomy Toolbox. Amygdala complex connectivity was measured in twenty-one individuals with PTSD, before and after a 30-minute session of EEG neurofeedback targeting alpha desynchronization. - Results - EEG neurofeedback was associated with a shift in amygdala complex connectivity from areas implicated in defensive, emotional, and fear processing/memory retrieval (left BLA and left SFA to the periaqueductal gray, and left SFA to the left hippocampus) to prefrontal areas implicated in emotion regulation/modulation (right CMA to the medial prefrontal cortex). This shift in amygdala complex connectivity was associated with reduced arousal, greater resting alpha synchronization, and was negatively correlated to PTSD symptom severity. - Conclusion - These findings have significant implications for developing targeted non-invasive treatment interventions for PTSD patients that utilize alpha oscillatory neurofeedback, showing evidence of neuronal reconfiguration between areas highly implicated in the disorder, in addition to acute symptom alleviation.