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White Matter-Based Structural Brain Network of Anxiety

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Anxiety Disorders

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

Abstract

Anxiety disorders are characterized by excessive fear and anxiety and related behavioral disturbances. Because diffusion tensor imaging is sensitive to detect subtle pathology of the brain, it has been used to characterize differences in white matter microstructure for a broad spectrum of psychiatric disorders. The neurobiological underpinnings of a trait anxiety seem to be associated with the uncinate fasciculus, a major pathway between the amygdala and orbitofrontal cortex. Apparent WM micro-alterations in patients with panic disorder are present in diverse and widespread regions, although alterations vary in terms of clinical symptom severity and comorbidities. Social anxiety disorder is associated with structural dysconnectivity in a fronto-limbic network consistent with reduced fractional anisotropy values in uncinate fasciculus and inferior longitudinal fasciculus. The pathogenesis of obsessive-compulsive disorder may include abnormal findings in not only the fronto-striato-thalamic circuit but also the posterior and temporal regions of forceps major and cingulum bundle. Studies of white matter status in anxiety revealed overlapping patterns of front-cortical and fronto-limbic changes with uncinate fasciculus and cingulum alterations a frequent component.

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Lee, K.S., Lee, S.H. (2020). White Matter-Based Structural Brain Network of Anxiety. 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_4

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