TY - JOUR
T1 - Visual Organization of the Default Network
AU - Szinte, Martin
AU - Knapen, Tomas
PY - 2020/5/18
Y1 - 2020/5/18
N2 - The default network (DN) is a brain network with correlated activities spanning frontal, parietal, and temporal cortical lobes. The DN activates for high-level cognition tasks and deactivates when subjects are actively engaged in perceptual tasks. Despite numerous observations, the role of DN deactivation remains unclear. Using computational neuroimaging applied to a large dataset of the Human Connectome Project (HCP) and to two individual subjects scanned over many repeated runs, we demonstrate that the DN selectively deactivates as a function of the position of a visual stimulus. That is, we show that spatial vision is encoded within the DN by means of deactivation relative to baseline. Our results suggest that the DN functions as a set of high-level visual regions, opening up the possibility of using vision-science tools to understand its putative function in cognition and perception.
AB - The default network (DN) is a brain network with correlated activities spanning frontal, parietal, and temporal cortical lobes. The DN activates for high-level cognition tasks and deactivates when subjects are actively engaged in perceptual tasks. Despite numerous observations, the role of DN deactivation remains unclear. Using computational neuroimaging applied to a large dataset of the Human Connectome Project (HCP) and to two individual subjects scanned over many repeated runs, we demonstrate that the DN selectively deactivates as a function of the position of a visual stimulus. That is, we show that spatial vision is encoded within the DN by means of deactivation relative to baseline. Our results suggest that the DN functions as a set of high-level visual regions, opening up the possibility of using vision-science tools to understand its putative function in cognition and perception.
KW - deactivation
KW - default network
KW - Human Connectome Project
KW - population receptive field
KW - ultra-high-field fMRI
UR - http://www.scopus.com/inward/record.url?scp=85084923932&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85084923932&partnerID=8YFLogxK
U2 - 10.1093/cercor/bhz323
DO - 10.1093/cercor/bhz323
M3 - Article
C2 - 32031204
AN - SCOPUS:85084923932
SN - 1047-3211
VL - 30
SP - 3518
EP - 3527
JO - Cerebral cortex (New York, N.Y. : 1991)
JF - Cerebral cortex (New York, N.Y. : 1991)
IS - 6
ER -