Abstract #2070
Signal Processing Spreads a Voxels Temporal Frequency Task-Activated Peak and Induces Spatial Correlations in Dual-Task Complex-Valued fMRI
Mary C. Kociuba 1 and Daniel B. Rowe 1,2
1
Department of Mathematics, Statistics, and
Computer Science, Marquette University, Milwaukee,
Wisconsin, United States,
2
Department
of Biophysics, Medical College of Wisconsin, Milwaukee,
Wisconsin, United States
Given a dual-task experimental design with different
task periods, two distinct task-activated peaks are
expected. Signal processing will alter the activated
voxels temporal frequency spectrum, by spreading voxel
task activated peaks temporally and spatially into
neighboring frequencies and voxels. If the period of
both tasks falls within a close range, without knowledge
of the expected task-activated regions, it is difficult
to resolve the task to the associated region after
processing. Modeling the impact of signal processing,
with respect to the task-activated frequency, is
critical to developing methods to account for artificial
correlations, while preserving the signal of interest.
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