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Neural Plasticity - Volume 2016 2016, Article ID 8307175, 9 pages -

Research Article

Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea

fMEG Center, University of Tübingen, Tübingen, Germany

IMPRS for Cognitive and Systems Neuroscience, University of Tübingen, Tübingen, Germany

Department of Internal Medicine, Psychosomatic Medicine and Psychotherapy, University of Tübingen, Tübingen, Germany

Received 23 August 2016; Accepted 24 October 2016

Academic Editor: Cun-Zhi Liu

Copyright © 2016 In-Seon Lee and Younbyoung Chae. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We used functional magnetic resonance imaging to investigate how causal influences between brain regions during the rubber hand illusion RHI are modulated by tactile and visual stimuli. We applied needle rotations during the RHI in two different ways: one was with the real hand reinstantiation by tactile stimuli, R-TS and the other was with the rubber hand reinstantiation by visual stimuli, R-VS. We used dynamic causal modeling to investigate interactions among four relevant brain regions: the ventral premotor cortex PMv, the intraparietal sulcus IPS, the secondary somatosensory cortex SII, and the lateral occipitotemporal cortex LOC. The tactile aspects of needle rotations changed the effective connectivity by directly influencing activity in the SII, whereas visual aspects of needle rotation changed the effective connectivity by influencing both the SII and the LOC. The endogenous connectivity parameters between the IPS and the PMv were reduced significantly in the R-TS condition. The modulatory parameters between the IPS and the PMv were enhanced significantly in the R-TS condition. The connectivity patterns driven by disowned bodily states could be differentially modulated by tactile and visual afferent inputs. Effective connectivity between the parietal and frontal multimodal areas may play important roles in the reinstantiation of body ownership.





Autor: In-Seon Lee and Younbyoung Chae

Fuente: https://www.hindawi.com/



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