Articlebronze2018

Structural and effective brain connectivity underlying biological motion detection

Arseny A. Sokolov · Peter Zeidman · Michael Erb · Philippe Ryvlin · Karl John Friston · Marina A. Pavlova

92 citations0/0 files storedProceedings of the National Academy of Sciences

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Action Observation and Synchronization Visual perception and processing mechanisms Functional Brain Connectivity Studies

Abstract

The perception of actions underwrites a wide range of socio-cognitive functions. Previous neuroimaging and lesion studies identified several components of the brain network for visual biological motion (BM) processing, but interactions among these components and their relationship to behavior remain little understood. Here, using a recently developed integrative analysis of structural and effective connectivity derived from high angular resolution diffusion imaging (HARDI) and functional magnetic resonance imaging (fMRI), we assess the cerebro-cerebellar network for processing of camouflaged point-light BM. Dynamic causal modeling (DCM) informed by probabilistic tractography indicates that the right superior temporal sulcus (STS) serves as an integrator within the temporal module. However, the STS does not appear to be a "gatekeeper" in the functional integration of the occipito-temporal and frontal regions: The fusiform gyrus (FFG) and middle temporal cortex (MTC) are also connected to the right inferior frontal gyrus (IFG) and insula, indicating multiple parallel pathways. BM-specific loops of effective connectivity are seen between the left lateral cerebellar lobule Crus I and right STS, as well as between the left Crus I and right insula. The prevalence of a structural pathway between the FFG and STS is associated with better BM detection. Moreover, a canonical variate analysis shows that the visual sensitivity to BM is best predicted by BM-specific effective connectivity from the FFG to STS and from the IFG, insula, and STS to the early visual cortex. Overall, the study characterizes the architecture of the cerebro-cerebellar network for BM processing and offers prospects for assessing the social brain.

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References

2008How do you feel — now? The anterior insula and human awareness 1981Visual properties of neurons in a polysensory area in superior temporal sulcus of the macaque.2001From the perception of action to the understanding of intention 2011Mechanisms of Social Cognition 2000Brain Areas Involved in Perception of Biological Motion 1996Specific Involvement of Human Parietal Systems and the Amygdala in the Perception of Biological Motion 2003Electrophysiology and brain imaging of biological motion 2001Functional neuroanatomy of biological motion perception in humans

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