Premium
Detection of neuronal current MRI in human without BOLD contamination
Author(s) -
Luo Qingfei,
Jiang Xia,
Gao JiaHong
Publication year - 2011
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.22842
Subject(s) - functional magnetic resonance imaging , interstimulus interval , blood oxygen level dependent , neuroscience , signal (programming language) , magnetic resonance imaging , human brain , psychology , stimulation , computer science , medicine , radiology , programming language
Controversial results regarding the detectability of neuronal current magnetic resonance imaging (ncMRI) have been reported in different studies on human subjects. In all the previous studies, the ncMRI signal was detected under a continuous and paradigm task‐induced blood oxygen level dependent (BOLD) signal background. The aim of this study is to investigate the possibility of detecting ncMRI signal in human brain in the situation that task‐induced BOLD background is absent or minimum. In this study, by adopting an event‐related visuomotor paradigm with long interstimulus interval (=20 s), the ncMRI signal was detected when the BOLD signal fully returned to its baseline, and the potential BOLD background contamination was avoided effectively. The results showed that the visuomotor stimulation elicited BOLD activation in visual and motor cortices, but no significant ncMRI signal change (in magnitude) was detected in human brain. These experimental findings are consistent with theoretical predications. Magn Reson Med, 2011. © 2011 Wiley‐Liss, Inc.