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research article

Common and distinct brain networks of autoscopic phenomena

Blondiaux, Eva  
•
Heydrich, Lukas
•
Blanke, Olaf  
March 10, 2021
NeuroImage: Clinical

Objective Autoscopic phenomena (AP) are illusory own body reduplications characterized by the visual perception of a second own body in extrapersonal space, and include three main forms: autoscopic hallucination (AH), heautoscopy (HAS) and out-of-body-experience (OBE). Past research showed that lesions were heterogeneously distributed and affected many different brain regions within and across patients, while small case series suggested that AP lesions converge in temporo-parietal and parieto-occipital cortex. As only few studies investigated each form of AP separately, it remains unknown whether the three AP are characterized by common and distinct brain mechanisms. Methods Here, we applied lesion network analysis in 26 neurological AP patients and determined their common and distinct functional connectivity patterns. Results We report that all localize to a single common brain network at the bilateral temporo-parietal junction, further associated with specific patterns of functional connectivity, defining each type of AP. OBE resulted from a brain network connected to bilateral angular gyrus, right precuneus, and right inferior frontal gyrus, differing from AH with a brain network connected to bilateral precuneus, inferior temporal gyrus, and cerebellum. HAS resulted from a brain network connected to left inferior frontal gyrus, left insula and left parahippocampus. Conclusion The present data identify the temporo-parietal junction as the common core region for AP and show that each form of AP recruits additional specific networks, associated with different sensorimotor and self-related sub-networks.

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Type
research article
DOI
10.1016/j.nicl.2021.102612
Author(s)
Blondiaux, Eva  
Heydrich, Lukas
Blanke, Olaf  
Date Issued

2021-03-10

Published in
NeuroImage: Clinical
Volume

30

Article Number

102612

Subjects

Lesion network mapping

•

Multisensory processing

•

Bodily self-consciousness

•

Temporo-parietal junction

Note

This is an Open Access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

REVIEWED

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Available on Infoscience
March 10, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/175849
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