Relationships between cortical myeloarchitecture and electrophysiological networks

Area of Science:

• Neuroscience
• Brain Imaging
• Neurophysiology

Background:

• The human brain's cognitive functions depend on dynamic functional networks.
• The relationship between cortical microstructure and functional connectivity is not well understood.
• Animal studies suggest electrical activity influences myelination.

Purpose of the Study:

• To investigate the link between gray matter myelin and electrophysiological connectivity in the human brain.
• To explore how cortical microstructure supports functional brain networks.

Main Methods:

• Utilized ultra-high field magnetic resonance imaging (MRI) and structural covariance to map myelin density across cortical regions.
• Employed magnetoencephalography (MEG) to identify electrophysiological brain networks.
• Correlated structural (myelin-based) and functional (electrophysiological) networks.

Main Results:

• Developed a structural network based on myelin density and structural covariance.
• Identified major electrophysiological communication pathways using MEG.
• Found a significant relationship between structural and functional networks, modulated by neural oscillatory frequency and integration.

Conclusions:

• Cortical myelin density is related to electrophysiological connectivity in the human brain.
• Neural oscillations play a key role in mediating brain network communication.
• This study provides insights into the structure-function relationship in the brain and its potential alterations in disease.