Spatial complexity of brain signal is altered in patients with generalized anxiety disorder.

Abstract:

BACKGROUND:Is it healthy to be chaotic? Recent studies have argued that mental disorders are associated with more orderly neural activities, corresponding to a less flexible functional system. These conclusions were derived from altered temporal complexity. However, the relationship between spatial complexity and health is unknown, although spatial configuration is of importance for normal brain function. METHODS:Based on resting-state functional magnetic resonance imaging data, we used Sample entropy (SampEn) to evaluate the altered spatial complexity in patients with generalized anxiety disorder (GAD; n = 47) compared to healthy controls (HCs; n = 38) and the relationship between spatial complexity and anxiety level. RESULTS:Converging results showed increased spatial complexity in patients with GAD, indicating more chaotic spatial configuration. Interestingly, inverted-U relationship was revealed between spatial complexity and anxiety level, suggesting complex relationship between health and the chaos of human brain. LIMITATIONS:Anxiety-related alteration of spatial complexity should be verified at voxel level in a larger sample and compared with results of other indices to clarify the mechanism of spatial chaotic of anxiety. CONCLUSIONS:Altered spatial complexity in the brain of GAD patients mirrors inverted-U relationship between anxiety and behavioral performance, which may reflect an important characteristic of anxiety. These results indicate that SampEn is a good reflection of human health or trait mental characteristic.

journal_name

J Affect Disord

authors

Wang Y,Wang X,Ye L,Yang Q,Cui Q,He Z,Li L,Yang X,Zou Q,Yang P,Liu D,Chen H

doi

10.1016/j.jad.2018.12.107

subject

Has Abstract

pub_date

2019-03-01 00:00:00

pages

387-393

eissn

0165-0327

issn

1573-2517

pii

S0165-0327(18)31853-6

journal_volume

246

pub_type

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