DOI: 10.1101/510784Jan 3, 2019Paper

Reduced structural connectivity in Insomnia Disorder

BioRxiv : the Preprint Server for Biology
Kira JespersenPeter Vuust

Abstract

Insomnia Disorder is the most prevalent sleep disorder, and it involves both sleep difficulties and daytime complaints. The neural underpinnings of Insomnia Disorder are poorly understood. Several existing neuroimaging studies focused on local measures and specific regions of interests, which makes it difficult to judge their whole-brain significance. We therefore here applied a data-driven approach to assess differences in whole-brain structural connectivity between adults with Insomnia Disorder and matched controls without sleep complaints. We used diffusion tensor imaging and probabilistic tractography to assess whole-brain structural connectivity and examined group differences using Network-Based Statistics. The results revealed a significant difference in the structural connectivity of the two groups. Participants with Insomnia Disorder showed reduced connectivity in a subnetwork that included mainly fronto-subcortical connections with the insula as a key region. By taking a whole-brain network perspective, our study enables the integration of previous inconsistent findings. Our results reveal that reduced structural connectivity of the left insula and the connections between frontal and subcortical regions are central neu...Continue Reading

Related Concepts

Brain
Emotions
Neurobiology
Sleep
Biological Adaptation to Stress
Structure
Participant
Subcortical
Sleep Disorders
Ballana insula

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