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  Effect of a mirror-like illusion on activation in the precuneus assessed with functional near-infrared spectroscopy

Mehnert, J., Brunetti, M., Steinbrink, J., Niedeggen, M., & Dohle, C. (2013). Effect of a mirror-like illusion on activation in the precuneus assessed with functional near-infrared spectroscopy. Journal of Biomedical Optics, 18(6): 066001. doi:10.1117/1.JBO.18.6.066001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1728-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-83E6-5
Genre: Journal Article

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Mehnert, Jan1, 2, 3, 4, Author              
Brunetti, Maddalena5, 6, 7, Author
Steinbrink, Jens1, 5, 8, Author
Niedeggen, Michael7, Author
Dohle, Christian5, 6, 9, Author
Affiliations:
1Berlin Neuroimaging Center, Charité University Medicine Berlin, Germay, ou_persistent22              
2Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
3Department of Machine Learning, TU Berlin, Germany, ou_persistent22              
4Department of Brain and Cognitive Engineering, Korea University, Seoul, Republic of Korea, ou_persistent22              
5Center for Stroke Research, Charité University Medicine Berlin, Germany, ou_persistent22              
6Median Clinic Berlin-Kladow, Germany, ou_persistent22              
7Department of Education and Psychology, FU Berlin, Germany, ou_persistent22              
8Bernstein Focus: Neurotechnology Berlin, Germany, ou_persistent22              
9University of Potsdam, Germany, ou_persistent22              

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 Abstract: Mirror therapy is a therapy to treat patients with pain syndromes or hemiparesis after stroke. However, the underlying neurophysiologic mechanisms are not clearly understood. In order to determine the effect of a mirror-like illusion (MIR) on brain activity using functional near-infrared spectroscopy, 20 healthy right-handed subjects were examined. A MIR was induced by a digital horizontal inversion of the subjects’ filmed hand. Optodes were placed on the primary motor cortex (M1) and the occipito-parietal cortex (precuneus, PC). Regions of interest (ROI) were defined a priori based on previous results of similar studies and confirmed by the analysis of effect sizes. Analysis of variance of the ROI signal revealed a dissociated pattern: at the PC, the MIR caused a significant inversion of a hemispheric lateralization opposite to the perceived hand, independent of the moving hand. In contrast, activity in M1 showed lateralization opposite to the moving hand, but revealed no mirror effect. These findings extend our understanding on interhemispheric rivalry and indicate that a MIR is integrated into visuomotor coordination similar to normal view, irrespective of the hand that is actually performing the task.

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Language(s): eng - English
 Dates: 2013-06-03
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: BibTex Citekey: mehnert2013effect
DOI: 10.1117/1.JBO.18.6.066001
PMID: 23733017
PMC: PMC4023640
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Title: Journal of Biomedical Optics
Source Genre: Journal
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Publ. Info: Bellingham, WA : Published by SPIE--the International Society for Optical Engineering in cooperation with International Biomedical Optics Society
Pages: - Volume / Issue: 18 (6) Sequence Number: 066001 Start / End Page: - Identifier: ISSN: 1083-3668
CoNE: https://pure.mpg.de/cone/journals/resource/954925607859