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Neurobiological substrates of cognitive rigidity and autonomic inflexibility in generalized anxiety disorder. | LitMetric

Neurobiological substrates of cognitive rigidity and autonomic inflexibility in generalized anxiety disorder.

Biol Psychol

Department of Psychiatry, Brighton and Sussex Medical School, University of Sussex, Brighton, UK; Sackler Centre for Consciousness Science, University of Sussex, Brighton, UK.

Published: September 2016

AI Article Synopsis

Article Abstract

Generalized anxiety disorder (GAD) is characterized by difficulties in inhibiting both perseverative thoughts (worry and rumination) and autonomic arousal. We investigated the neurobiological substrates of such abnormal inhibitory processes, hypothesizing aberrant functional coupling within 'default mode' (DMN) and autonomic brain networks. Functional imaging and heart rate variability (HRV) data were acquired from GAD patients and controls during performance of three tracking tasks interspersed with a perseverative cognition (PC) induction. After detection of infrequent target stimuli, activity within putative DMN hubs was suppressed, consistent with a redirection of attentional resources from internal to external focus. This magnitude of activity change was attenuated in patients and individuals with higher trait PC, but was predicted by individual differences in HRV. Following the induction of PC in controls, this pattern of neural reactivity became closer to that of GAD patients. Results support, at a neural level, the association between cognitive inflexibility and autonomic rigidity.

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Source
http://dx.doi.org/10.1016/j.biopsycho.2016.06.009DOI Listing

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