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Paper: PS-2A.18
Session: Poster Session 2A
Location: H Lichthof
Session Time: Sunday, September 15, 17:15 - 20:15
Presentation Time:Sunday, September 15, 17:15 - 20:15
Presentation: Poster
Publication: 2019 Conference on Cognitive Computational Neuroscience, 13-16 September 2019, Berlin, Germany
Paper Title: Modulation of extrinsic and intrinsic processing by naturalistic audiovisual stimulation
Manuscript:  Click here to view manuscript
License: Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Authors: Dror Cohen, Shinji Nishimoto, National Institute of Information and Communications Technology, Japan
Abstract: Brain activity reflects both the processing of external stimuli (extrinsic processing) and the processing of signals generated internally (intrinsic processing). Intrinsic processing is associated with default mode areas whereas extrinsic processing is associated with sensory areas. However, different stimuli involve different processes such that the level and extent of extrinsic processing varies over time. The relationship between these fluctuations in extrinsic processing and fluctuations in intrinsic processing is largely unknown. Here we present preliminary results (N=2) investigating how extrinsic (stimulus-responses) and intrinsic (default mode network connectivity) processing are modulated by naturalistic audiovisual stimulation. We focus our analysis on brain areas (fMRI voxels) showing a mixture of extrinsic and intrinsic processing, which we identify throughout the cortex. Clustering analysis suggests that in posterior brain areas extrinsic and intrinsic processing compete, whereas in parietal and frontal areas they may cooperate.