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Abstract #3913

A cortical-depth-dependent analysis of fingertip maps in human somatosensory cortex measured at ultra-high field (7T).

Ashley York1, Saskia Bollmann2, Clinton Condon1, Markus Barth2, Ross Cunnington1, and Alexander Puckett1
1School of Psychology, University of Queensland, St Lucia, Australia, 2Centre for Advanced Imaging, University of Queensland, St Lucia, Australia

While cortical-depth-dependent fMRI studies are becoming increasingly common, these studies often focus on comparing average responses at different depths. Here we aimed, instead, to explore the integrity of a spatial response pattern across depth. For this, we analysed sub-millimeter fingertip mapping data from human somatosensory cortex. Data were acquired using fMRI at 7T and was comprised of two sets of somatotopic maps (bottom-up or top-down driven). Both sets of somatotopic maps were found to vary across depth and were marked by a banded pattern at superficial layers; however, this pattern dissipated in deeper layers – being dominated by noise.

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