Multimodal 7T MRI reveals subcortical structural, functional, iron accumulation, and glymphatic abnormalities in chronic migraine.

Chronic migraine (CM) is a complex condition that affects many people. Researchers used advanced 7T MRI technology to study brain changes in CM patients. They looked at 62 healthy controls, 62 episodic migraine patients, and 62 CM patients. Half of the CM patients also had medication-overuse headache (MOH). The study focused on specific brain regions, including the hypothalamus, thalamus, hippocampus, and amygdala. The researchers measured brain volumes, blood flow, and iron levels. They found significant structural and functional changes in CM patients, especially those with MOH. These changes could explain why some people develop chronic migraines. The findings suggest that CM involves complex brain alterations that might be linked to ongoing pain. Understanding these changes can help in developing better treatments for migraine sufferers. This research highlights the importance of advanced imaging techniques in studying chronic migraine. Clinical relevance: This study shows that chronic migraine involves significant brain changes, which could guide future treatment strategies.