Abstract #3927
Investigating digit representation and tactile attention in SI/SII with a novel paradigm
Rosa Sanchez Panchuelo 1 , Keren Yang 1 , Martin Buehrer 2 , Miles Humberstone 3 , and Susan Francis 1
1
University of Nottingham, Nottingham, United
Kingdom,
2
Gyrotools,
Zurich, Switzerland,
3
Nottingham
University Hospitals Trust, Nottingham, United Kingdom
We investigate digit representation and tactile
attention in SI and SII with high spatial resolution at
7T. fMRI was performed during a novel task to modulate
spatial attention between digits 2, 3 and 4 during
stimulation of the digits of the left hand, each with a
different periodicity. This novel paradigm revealed a
clear digit somatotopy within SI, but no modulation to
attention. In contrast, no somatotopic map was seen in
SII, with digit responses largely overlapping, whilst
SII and other cortical areas, such as SMA and pre-SMA,
were strongly modulated by tactile attention in an
overlapping manner.
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