Task-related concurrent but opposite modulations of overlapping functional networks as revealed by spatial ICA
Animal studies indicate that different functional networks (FNs), each with a unique timecourse, may overlap at common brain regions. For understanding how different FNs overlap in the human brain and how the timecourses of overlapping FNs are modulated by cognitive tasks, we applied spatial independent component analysis (sICA) to functional magnetic resonance imaging (fMRI) data. These data were acquired from healthy participants while they performed a visual task with parametric loads of attention and working memory.
Functional images were acquired using gradient-echo EPI scanning sequence (TR/ TE=1500/30ms, Flip angle=70 degrees, 26 slices, 3mm thick with 1.2 mm skip, 3.125 × 3.125 mm2 in plane pixels) with a Siemens Allegra 3T system. The scanning plane was off the AC-PC line rostrally at 20 degrees. The thin scanning slice and tilted scanning plane were used to reduce susceptibility-related signal loss at the basal forebrain (Deichmann et al 2003). Each participant had three functional runs, and each run used a different task script and acquired 258 volumes. The order of scripts was counterbalanced across participants.
- J Xu
- S Zhang
- VD Calhoun
- J Monterosso
- MN Potenza
External Publication Links:Task-related concurrent but opposite modulations of overlapping functional networks as revealed by spatial ICA
Siemens Allegra 3T
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This data was obtained from the OpenfMRI database. Its accession number is ds000122
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Revision: 1.0.0 Date Set: April 8, 2016, 9 p.m.