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Linear and Nonlinear EEG-Based Functional Networks in Anxiety Disorders

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Anxiety Disorders

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 1191))

Abstract

Electrocortical network dynamics are integral to brain function. Linear and nonlinear connectivity applications enrich neurophysiological investigations into anxiety disorders. Discrete EEG-based connectivity networks are unfolding with some homogeneity for anxiety disorder subtypes. Attenuated delta/theta/beta connectivity networks, pertaining to anterior-posterior nodes, characterize panic disorder. Nonlinear measures suggest reduced connectivity of ACC as an executive neuro-regulator in germane “fear circuitry networks” might be more central than considered. Enhanced network complexity and theta network efficiency at rest define generalized anxiety disorder, with similar tonic hyperexcitability apparent in social anxiety disorder further extending to task-related/state functioning. Dysregulated alpha connectivity and integration of mPFC-ACC/mPFC-PCC relays implicated with attentional flexibility and choice execution/congruence neurocircuitry are observed in trait anxiety. Conversely, state anxiety appears to recruit converging delta and beta connectivity networks as panic, suggesting trait and state anxiety are modulated by discrete neurobiological mechanisms. Furthermore, EEG connectivity dynamics distinguish anxiety from depression, despite prevalent clinical comorbidity. Rethinking mechanisms implicated in the etiology, maintenance, and treatment of anxiety from the perspective of EEG network science across micro- and macroscales serves to shed light and move the field forward.

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  1. Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Osher Center for Integrative Medicine, Nashville, TN, USA

    Poppy L. A. Schoenberg

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  1. College of Medicine, Korea University, Gyeonggido, Korea (Republic of)

    Yong-Ku Kim

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Schoenberg, P.L.A. (2020). Linear and Nonlinear EEG-Based Functional Networks in Anxiety Disorders. In: Kim, YK. (eds) Anxiety Disorders. Advances in Experimental Medicine and Biology, vol 1191. Springer, Singapore. https://doi.org/10.1007/978-981-32-9705-0_3

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