Multi-modal MRI Reveals the Neurovascular Coupling Dysfunction in Chronic Migraine.

Previous studies reported that long-term nociceptive stimulation could result in neurovascular coupling (NVC) dysfunction in brain, but these studies were based mainly on unimodal imaging biomarkers, thus could not comprehensively reflect NVC dysfunction. We investigated the potential NVC dysfunction in chronic migraine by exploring the relationship between neuronal activity and cerebral perfusion maps. The Pearson correlation coefficients between these 2 maps were defined as the NVC biomarkers. NVC biomarkers in migraineurs were significantly lower in left inferior parietal gyrus (IPG), left superior marginal gyrus (SMG) and left angular gyrus (AG), but significantly higher in right superior occipital gyrus (SOG), right superior parietal gyrus (SPG), and precuneus. These brain regions were located mainly in parietal or occipital lobes and were related to visual or sensory information processing. ALFF-CBF in right SPG was positively correlated with disease history and that in right precuneus was negatively correlated with migraine persisting time. fALFF-CBF in left SMG and AG were negatively related to headache frequency and positively related to health condition and disease history. In conclusion, multi-modal MRI could be used to detect NVC dysfunction in chronic migraine patients, which is a new method to assess the impact of chronic pain on the brain.