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Fast optical imaging of frontal cortex during active and passive oddball tasks
Author(s) -
Low Kathy A.,
Leaver Echo,
Kramer Arthur F.,
Fabiani Monica,
Gratton Gabriele
Publication year - 2006
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2006.00390.x
Subject(s) - oddball paradigm , neuroscience , psychology , electrophysiology , brain activity and meditation , latency (audio) , premovement neuronal activity , brain mapping , event related potential , electroencephalography , audiology , computer science , medicine , telecommunications
This study used the high spatial and temporal resolution of the event‐related optical signal (EROS) to investigate the timing of neuronal activity in frontal cortex during auditory target detection and passive oddball tasks. Activation in right middle frontal gyrus (MFG) peaked approximately 350 ms following rare target tones. This corresponded closely to the latency of the simultaneously recorded electrical P3 component. In addition, we found activation in left lateral MFG peaking at approximately 130 ms following tone onset for conditions that may have required response inhibition. These results correspond with activation patterns observed in similar fMRI studies, but provide temporal tags for the activated locations. These data may help bridge the gap between electrophysiological and hemodynamic measures of target detection and contribute to our understanding of the spatiotemporal dynamics of brain activity during target processing.