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Using Fmri To Investigate The Potential Cause Of Inverse Oxygenation Reported In Fnirs Studies Of Motor Imagery, Androu Abdalmalak, Daniel Milej, David J. Cohen, Udunna Anazodo, Tracy Ssali, Mamadou Diop, Adrian M. Owen, Keith St. Lawrence
Using Fmri To Investigate The Potential Cause Of Inverse Oxygenation Reported In Fnirs Studies Of Motor Imagery, Androu Abdalmalak, Daniel Milej, David J. Cohen, Udunna Anazodo, Tracy Ssali, Mamadou Diop, Adrian M. Owen, Keith St. Lawrence
BrainsCAN Publications
© 2019 Elsevier B.V. Motor imagery (MI) is a commonly used cognitive task in brain–computer interface (BCI) applications because it produces reliable activity in motor-planning regions. However, a number of functional near-infrared spectroscopy (fNIRS) studies have reported the unexpected finding of inverse oxygenation: increased deoxyhemoglobin and decreased oxyhemoglobin during task periods. This finding questions the reliability of fNIRS for BCI applications given that MI activation should result in a focal increase in blood oxygenation. In an attempt to elucidate this phenomenon, fMRI and fNIRS data were acquired on 15 healthy participants performing a MI task. The fMRI data provided global …