Gating of memory encoding of time-delayed cross-frequency MEG networks revealed by graph filtration based on persistent homology
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Gating of memory encoding of time-delayed cross-frequency MEG networks revealed by graph filtration based on persistent homology. / Hahm, Jarang; Lee, Hyekyoung; Park, Hyojin; Kang, Eunjoo; Kim, Yu Kyeong; Chung, Chun Kee; Kang, Hyejin; Lee, Dong Soo.
In: Scientific Reports, Vol. 7, 41592, 07.02.2017.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Gating of memory encoding of time-delayed cross-frequency MEG networks revealed by graph filtration based on persistent homology
AU - Hahm, Jarang
AU - Lee, Hyekyoung
AU - Park, Hyojin
AU - Kang, Eunjoo
AU - Kim, Yu Kyeong
AU - Chung, Chun Kee
AU - Kang, Hyejin
AU - Lee, Dong Soo
PY - 2017/2/7
Y1 - 2017/2/7
N2 - To explain gating of memory encoding, magnetoencephalography (MEG) was analyzed over multi-regional network of negative correlations between alpha band power during cue (cue-alpha) and gamma band power during item presentation (item-gamma) in Remember (R) and No-remember (NR) condition. Persistent homology with graph filtration on alpha-gamma correlation disclosed topological invariants to explain memory gating. Instruction compliance (R-hits minus NR-hits) was significantly related to negative coupling between the left superior occipital (cue-alpha) and the left dorsolateral superior frontal gyri (item-gamma) on permutation test, where the coupling was stronger in R than NR. In good memory performers (R-hits minus false alarm), the coupling was stronger in R than NR between the right posterior cingulate (cue-alpha) and the left fusiform gyri (item-gamma). Gating of memory encoding was dictated by inter-regional negative alpha-gamma coupling. Our graph filtration over MEG network revealed these inter-regional time-delayed cross-frequency connectivity serve gating of memory encoding.
AB - To explain gating of memory encoding, magnetoencephalography (MEG) was analyzed over multi-regional network of negative correlations between alpha band power during cue (cue-alpha) and gamma band power during item presentation (item-gamma) in Remember (R) and No-remember (NR) condition. Persistent homology with graph filtration on alpha-gamma correlation disclosed topological invariants to explain memory gating. Instruction compliance (R-hits minus NR-hits) was significantly related to negative coupling between the left superior occipital (cue-alpha) and the left dorsolateral superior frontal gyri (item-gamma) on permutation test, where the coupling was stronger in R than NR. In good memory performers (R-hits minus false alarm), the coupling was stronger in R than NR between the right posterior cingulate (cue-alpha) and the left fusiform gyri (item-gamma). Gating of memory encoding was dictated by inter-regional negative alpha-gamma coupling. Our graph filtration over MEG network revealed these inter-regional time-delayed cross-frequency connectivity serve gating of memory encoding.
KW - Attention
KW - Network topology
U2 - 10.1038/srep41592
DO - 10.1038/srep41592
M3 - Article
VL - 7
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 41592
ER -