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Bridging large-scale cortical networks: Integrative and function-specific hubs in the thalamus
Kazuya Kawabata1,2, Epifanio Bagarinao2,3, Hirohisa Watanabe2,4
1Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
Iscience
|October 8, 2021
Summary
The thalamus acts as a critical brain hub, connecting various networks. This study maps its specific roles in functional integration, revealing key nuclei involved in higher cognition and primary processing.
Area of Science:
- Neuroscience
- Brain Connectivity
- Systems Neuroscience
Background:
- The thalamus is a crucial brain region for information processing.
- Its precise role as an integrative hub and the localization of its connector hubs are not fully understood.
Purpose of the Study:
- To characterize the thalamus's connector hub roles.
- To map the thalamus's functional connectivity with large-scale resting-state networks (RSNs).
Main Methods:
- Utilized a voxel-level network measure: functional connectivity overlap ratio (FCOR).
- Examined the association between thalamic regions and RSNs.
Main Results:
- Identified anterior and medial thalamic nuclei (anteroventral, mediodorsal) connecting to core-neurocognitive networks.
- Found sensorimotor network connections primarily around the lateral pulvinar nucleus.
- Highlighted anteroventral, ventral lateral, and mediodorsal nuclei as prominent connector hubs linking multiple RSNs.
Conclusions:
- The thalamus, with its extensive RSN connections, serves as a critical integrative hub.
- It plays a vital role in functional integration for both primary processing and higher cognitive functions.
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