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  Brain Network Reconfiguration and Perceptual Decoupling During an Absorptive State of Consciousness

Hove, M., Stelzer, J., Nierhaus, T., Thiel, S., Gundlach, C., Margulies, D., et al. (2016). Brain Network Reconfiguration and Perceptual Decoupling During an Absorptive State of Consciousness. Cerebral Cortex, 26(7), 3116-3124. doi:10.1093/cercor/bhv137.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-799A-B Version Permalink: http://hdl.handle.net/21.11116/0000-0000-799B-A
Genre: Journal Article

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Hove, MJ, Author
Stelzer, J1, 2, Author              
Nierhaus, T, Author
Thiel, SD, Author
Gundlach, C, Author
Margulies, DS, Author
Van Dijk, KRA, Author
Turner, R, Author
Keller, PE, Author
Merker, B, Author
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              

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 Abstract: Trance is an absorptive state of consciousness characterized by narrowed awareness of external surroundings and has long been used—for example, by shamans—to gain insight. Shamans across cultures often induce trance by listening to rhythmic drumming. Using functional magnetic resonance imaging (fMRI), we examined the brain-network configuration associated with trance. Experienced shamanic practitioners (n = 15) listened to rhythmic drumming, and either entered a trance state or remained in a nontrance state during 8-min scans. We analyzed changes in network connectivity. Trance was associated with higher eigenvector centrality (i.e., stronger hubs) in 3 regions: posterior cingulate cortex (PCC), dorsal anterior cingulate cortex (dACC), and left insula/operculum. Seed-based analysis revealed increased coactivation of the PCC (a default network hub involved in internally oriented cognitive states) with the dACC and insula (control-network regions involved in maintaining relevant neural streams). This coactivation suggests that an internally oriented neural stream was amplified by the modulatory control network. Additionally, during trance, seeds within the auditory pathway were less connected, possibly indicating perceptual decoupling and suppression of the repetitive auditory stimuli. In sum, trance involved coactive default and control networks, and decoupled sensory processing. This network reconfiguration may promote an extended internal train of thought wherein integration and insight can occur.

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 Dates: 2016-07
 Publication Status: Published in print
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 Identifiers: DOI: 10.1093/cercor/bhv137
BibTex Citekey: HoveSNTGMVTKM2015
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Title: Cerebral Cortex
Source Genre: Journal
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Pages: - Volume / Issue: 26 (7) Sequence Number: - Start / End Page: 3116 - 3124 Identifier: -