Abstract #2985
Using wholebrain, high temporal resolution, 3D-EPI-CAIPI to observe multisensory interaction in primary sensory cortices
Wietske van der zwaag 1 , Mayur Narsude 1 , Roberto Martuzzi 2 , and Jos P Marques 3
1
CIBM, EPFL, Lausanne, Switzerland,
2
LNCO,
EPFL, Lausanne, Switzerland,
3
UNIL,
Lausanne, Switzerland
This study aimed to demonstrate that with a fast BOLD
sensitive fMRI acquisition, 3D-EPI-CAIPI with TR=400ms,
subtle temporal effects, such as those involved in
multisensory facilitation in the primary sensory
cortices, can successfully be investigated. Differences
in time-to-peak for the BOLD responses mono- or
multisensory stimulation could be shown in auditory,
visual and motor cortices, with audiovisual stimulation
always leading to a faster response than auditory-only
or visual-only stimuli. No such effect could be
demonstrated for the same stimulus paradigm in otherwise
comparable TR=2s data.
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