Abstract #1736

Correlation between fMRI signals and oscillatory neuronal responses during audiovisual information processing

Hsin-Ju Lee^1,2, Lauri Nummenmaa^3,4,5, Hsiang-Yu Yu^6,7, Cheng-Chia Lee^7,8, Chien-Chen Chou⁶, Chien Chen^6,7, Wen-Jui Kuo^7,9, and Fa-Hsuan Lin^1,2

¹Physical Sciences Platform, Sunnybrook Research Institute, Toronto, ON, Canada, ²Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada, ³Turku PET Centre, University of Turku, Turku, Finland, ⁴Department of Psychology, University of Turku, Turku, Finland, ⁵Turku University Hospital, Turku, Finland, ⁶Department of Neurology, Taipei Veterans General Hospital, Taipei, Taiwan, ⁷Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan, ⁸Department of Neurosurgery, Taipei Veterans General Hospital, Taipei, Taiwan, ⁹Institute of Neuroscience, National Yang Ming Chiao Tung University, Taipei, Taiwan

Synopsis

We studied how fMRI signal is related to neural oscillations by taking both fMRI and invasive recordings from epilepsy patients. Specifically, we examined the neurovascular coupling during complex naturalistic stimuli processing. A significant negative correlation between gamma-band neural oscillations at hippocampus/amygdala and fMRI signals was found at the amygdala, hippocampus, and inferior occipital lobes while viewing short movie clips. These correlations sustain across gamma, beta, and alpha bands. The left angular gyrus shows a positive correlation between neural oscillations and fMRI dynamics at the theta band.

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