Mapping the long-term delayed recall-based cortex-hippocampus network constrained by the structural and functional...

Area of Science:

• Neuroscience
• Cognitive Science
• Medical Imaging

Background:

• Connectome mapping offers potential therapeutic targets for neurological and psychiatric disorders.
• Understanding the long-term delayed recall network, particularly its structural and functional connectome, remains an area needing further research.

Purpose of the Study:

• To identify the cortex-hippocampus network associated with long-term delayed recall using structural and functional connectome data.
• To investigate the network's relationship with cognitive functions, age, and activities of daily living.

Main Methods:

• A case-control study involving 131 participants (73 amnestic mild cognitive impairment patients, 58 healthy controls).
• Utilized multimodal magnetic resonance imaging, neuropsychological testing, and activities of daily living assessments.
• Employed probabilistic fiber tracking and functional connectivity analysis to define the cortex-hippocampus network nodes.

Main Results:

• Identified specific bilateral cortex-hippocampus network nodes critical for long-term delayed recall.
• Demonstrated significant interactions between recall performance and global network properties (e.g., hierarchy, efficiency, synchronization).
• Revealed associations between network properties and general cognitive function, executive function, and language abilities.

Conclusions:

• Introduced a novel symptom-based network approach linking brain structure, function, and cognition.
• The cortex-hippocampus network, constrained by structural and functional connectome, is significantly associated with long-term delayed recall.