Abstract #0585
Distinct BOLD laminar profiles elicited by retino-cortical and inter-hemispheric sources in human early visual cortex
Alessio Fracasso 1 , Natalia Petridou 2 , and Serge O Dumoulin 1
1
Experimental Psychology, Helmholtz
Institute, Utrecht University, Utrecht, Netherlands,
2
Radiology,
Imaging Division, UMC Utrecht, Utrecht, Netherlands
A goal of laminar imaging is to infer the origin of
signals by functional laminar profiles. We used a visual
paradigm that increases responses in the contralateral
hemisphere driven by retino-cortical sources and
decreases responses in the ipsilateral hemisphere driven
by inter-hemispheric sources. GE-BOLD data were acquired
at 0.55
3
mm resolution. Laminar profiles were
sorted according to linear trend strength towards the
pial surface. Profiles showing a weak linear trend
revealed a peak or dip at the middle layers when driven
by retino-cortical or inter-hemispheric sources
respectively. These profiles demonstrate the ability of
laminar imaging to infer the origin of signals.
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