Subcortical influences on the topology of cortical networks align with functional processing hierarchies
fMRI of the human brain reveals spatiotemporal patterns of functional connectivity (FC), forming distinct cortical networks. Lately, subcortical contributions to these configurations are receiving renewed interest, but investigations rarely focus explicitly on their effects on cortico-cortical FC. H...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | NeuroImage |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1053811923005682 |
| _version_ | 1797627369008136192 |
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| author | Fabian Hirsch Afra Wohlschlaeger |
| author_facet | Fabian Hirsch Afra Wohlschlaeger |
| author_sort | Fabian Hirsch |
| collection | DOAJ |
| description | fMRI of the human brain reveals spatiotemporal patterns of functional connectivity (FC), forming distinct cortical networks. Lately, subcortical contributions to these configurations are receiving renewed interest, but investigations rarely focus explicitly on their effects on cortico-cortical FC. Here, we employ a straightforward multivariable approach and graph-theoretic tools to assess subcortical impact on topological features of cortical networks. Given recent evidence showing that structures like the thalamus and basal ganglia integrate input from multiple networks, we expect increased segregation between cortical networks after removal of subcortical effects on their FC patterns. We analyze resting state data of young and healthy participants (male and female; N = 100) from the human connectome project. We find that overall, the cortical network architecture becomes less segregated, and more integrated, when subcortical influences are accounted for. Underlying these global effects are the following trends: ‘Transmodal’ systems become more integrated with the rest of the network, while ‘unimodal’ networks show the opposite effect. For single nodes this hierarchical organization is reflected by a close correspondence with the spatial layout of the principal gradient of FC (Margulies et al., 2016). Lastly, we show that the limbic system is significantly less coherent with subcortical influences removed. The findings are validated in a (split-sample) replication dataset. Our results provide new insight regarding the interplay between subcortex and cortical networks, by putting the integrative impact of subcortex in the context of macroscale patterns of cortical organization. |
| first_indexed | 2024-03-11T10:23:09Z |
| format | Article |
| id | doaj.art-e27ece219fc54ea79ec390658ddf22ac |
| institution | Directory Open Access Journal |
| issn | 1095-9572 |
| language | English |
| last_indexed | 2024-03-11T10:23:09Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | NeuroImage |
| spelling | doaj.art-e27ece219fc54ea79ec390658ddf22ac2023-11-16T06:06:00ZengElsevierNeuroImage1095-95722023-12-01283120417Subcortical influences on the topology of cortical networks align with functional processing hierarchiesFabian Hirsch0Afra Wohlschlaeger1Corresponding author.; Department of Diagnostic and Interventional Neuroradiology, Klinikum R.d.Isar, Technical University Munich, Ismaninger Str. 22, Munich 81675, GermanyDepartment of Diagnostic and Interventional Neuroradiology, Klinikum R.d.Isar, Technical University Munich, Ismaninger Str. 22, Munich 81675, GermanyfMRI of the human brain reveals spatiotemporal patterns of functional connectivity (FC), forming distinct cortical networks. Lately, subcortical contributions to these configurations are receiving renewed interest, but investigations rarely focus explicitly on their effects on cortico-cortical FC. Here, we employ a straightforward multivariable approach and graph-theoretic tools to assess subcortical impact on topological features of cortical networks. Given recent evidence showing that structures like the thalamus and basal ganglia integrate input from multiple networks, we expect increased segregation between cortical networks after removal of subcortical effects on their FC patterns. We analyze resting state data of young and healthy participants (male and female; N = 100) from the human connectome project. We find that overall, the cortical network architecture becomes less segregated, and more integrated, when subcortical influences are accounted for. Underlying these global effects are the following trends: ‘Transmodal’ systems become more integrated with the rest of the network, while ‘unimodal’ networks show the opposite effect. For single nodes this hierarchical organization is reflected by a close correspondence with the spatial layout of the principal gradient of FC (Margulies et al., 2016). Lastly, we show that the limbic system is significantly less coherent with subcortical influences removed. The findings are validated in a (split-sample) replication dataset. Our results provide new insight regarding the interplay between subcortex and cortical networks, by putting the integrative impact of subcortex in the context of macroscale patterns of cortical organization.http://www.sciencedirect.com/science/article/pii/S1053811923005682Functional connectivitySubcortexGradientGraph analysisLimbic systemThalamus |
| spellingShingle | Fabian Hirsch Afra Wohlschlaeger Subcortical influences on the topology of cortical networks align with functional processing hierarchies NeuroImage Functional connectivity Subcortex Gradient Graph analysis Limbic system Thalamus |
| title | Subcortical influences on the topology of cortical networks align with functional processing hierarchies |
| title_full | Subcortical influences on the topology of cortical networks align with functional processing hierarchies |
| title_fullStr | Subcortical influences on the topology of cortical networks align with functional processing hierarchies |
| title_full_unstemmed | Subcortical influences on the topology of cortical networks align with functional processing hierarchies |
| title_short | Subcortical influences on the topology of cortical networks align with functional processing hierarchies |
| title_sort | subcortical influences on the topology of cortical networks align with functional processing hierarchies |
| topic | Functional connectivity Subcortex Gradient Graph analysis Limbic system Thalamus |
| url | http://www.sciencedirect.com/science/article/pii/S1053811923005682 |
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