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Published on: April 8, 2019
Abnormal functional connectivity under somatosensory stimulation in migraine: a multi-frequency
Jing Ren1, Jing Xiang2, Yueqiu Chen1
1Department of Neurology, The Affiliated Brain Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
Migraine patients show altered brain networks, with increased functional connectivity between the sensory cortex and frontal lobe, particularly in high-frequency bands. These findings suggest elevated cortical networks in migraineurs, potentially impacting somatosensory processing.
Area of Science:
- Neuroscience
- Medical Imaging
Background:
- Previous magnetoencephalography (MEG) research indicates altered resting-state neural networks in migraine patients.
- The impact of these alterations on task-related networks remains largely unexplored.
Purpose of the Study:
- To investigate abnormalities in frequency-specific somatosensory-related networks in migraine patients using MEG.
- To identify alterations in functional connectivity during a task-related paradigm.
Main Methods:
- Twenty-two migraineurs and 22 age/sex-matched healthy volunteers underwent whole-head MEG.
- Electrical stimuli were applied to the median nerve, and MEG data were analyzed across multiple frequency bands (1-1000 Hz).
Main Results:
- Migraine patients exhibited significantly increased functional connectivity in the high-frequency band (250-1000 Hz) between the sensory cortex and frontal lobe.
- Graph theory analysis revealed increased connectivity degree, strength, path length, and clustering coefficients in various frequency bands (theta, beta, gamma, ripple) in migraineurs.
Conclusions:
- Migraine is associated with aberrant somatosensory cortical-to-frontal lobe connections.
- Elevated cortical networks, indicated by frequency-specific connectivity changes, are present in migraineurs.
- These functional connectivity alterations may play a role in somatosensory processing and migraine pathophysiology.
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