Universität zu Köln

Quante, Laura, Kluger, Daniel S., Buerkner, Paul C., Ekman, Matthias and Schubotz, Ricarda, I (2018). Graph measures in task-based fMRI: Functional integration during read-out of visual and auditory information. PLoS One, 13 (11). SAN FRANCISCO: PUBLIC LIBRARY SCIENCE. ISSN 1932-6203

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Abstract

This study investigated how attending to auditory and visual information systematically changes graph theoretical measures of integration and functional connectivity between three network modules: auditory, visual, and a joint task core. Functional MRI BOLD activity was recorded while healthy volunteers attended to colour and/or pitch information presented within an audiovisual stimulus sequence. Network nodes and modules were based on peak voxels of BOLD contrasts, including colour and pitch sensitive brain regions as well as the dorsal attention network. Network edges represented correlations between nodes' activity and were computed separately for each condition. Connection strength was increased between the task and the visual module when participants attended to colour, and between the task and the auditory module when they attended to pitch. Moreover, several nodal graph measures showed consistent changes to attentional modulation in form of stronger integration of sensory regions in response to attention. Together, these findings corroborate dynamical adjustments of both modality-specific and modality-independent functional brain networks in response to task demands and their representation in graph theoretical measures.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Quante, Laura UNSPECIFIED UNSPECIFIED UNSPECIFIED Kluger, Daniel S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Buerkner, Paul C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ekman, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Schubotz, Ricarda, I UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-165706
DOI:	10.1371/journal.pone.0207119
Journal or Publication Title:	PLoS One
Volume:	13
Number:	11
Date:	2018
Publisher:	PUBLIC LIBRARY SCIENCE
Place of Publication:	SAN FRANCISCO
ISSN:	1932-6203
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RESTING-STATE NETWORKS; VENTRAL ATTENTION SYSTEMS; HUMAN BRAIN; SPATIAL ATTENTION; CONNECTIVITY; CORTEX; SEGREGATION; ORGANIZATION; DORSAL; CORE Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16570