Open AccessBoosted activation of right inferior frontoparietal network: A basis for illusory movement awareness
Author(s) -
Cignetti Fabien,
Vaugoyeau Marianne,
Nazarian Bruno,
Roth Muriel,
Anton JeanLuc,
Assaiante Christine
Publication year - 2014
Publication title -
human brain mapping
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.005
H-Index - 191
eISSN - 1097-0193
pISSN - 1065-9471
DOI - 10.1002/hbm.22541
Subject(s) - illusion , psychology , inferior parietal lobule , functional magnetic resonance imaging , neuroscience , consciousness , brain activity and meditation , movement (music) , cognitive psychology , electroencephalography , philosophy , aesthetics
Abstract The feeling of illusory movement is considered important in the study of human behavior because it is deeply related to motor consciousness. However, the neural basis underlying the illusion of movement remains to be understood. Following optimal vibratory stimulation of muscle tendon, certain subjects experience illusory movements while others do not. In the present fMRI study, we sought to uncover the neural basis of illusory movement awareness by contrasting a posteriori these two types of subjects. Examining fMRI data using leave‐one‐subject‐out general linear models and region of interest analyses, we found that a non‐limb‐specific associative network, including the opercular part of the right inferior frontal gyrus and the right inferior parietal lobule, was more active in subjects with illusions. On the other hand, levels of activation in other brain areas involved in kinaesthetic processing were rather similar between the two subsamples of subjects. These results suggest that activation of the right inferior frontoparietal areas, once passed a certain threshold, forms the basis of illusory movements. This is consistent with the global neuronal workspace hypothesis that associates conscious processing with surges of frontoparietal activity. Hum Brain Mapp 35:5166–5178, 2014 . © 2014 Wiley Periodicals, Inc .