Cerebral perfusion alterations in patients with trigeminal neuralgia as measured by pseudo-continuous arterial spin labeling

• Published in: Frontiers in neuroscience Vol. 16; p. 1065411
• Main Authors: Zhou, Qianling, Li, Meng, Fan, Qisen, Chen, Feng, Jiang, Guihua, Wang, Tianyue, He, Qinmeng, Fu, Shishun, Yin, Yi, Lin, Jinzhi, Yan, Jianhao
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Research Foundation 16.12.2022; Frontiers Media S.A
• Subjects: Age; Alcoholism; Anxiety; arterial spin labeling; Blood flow; Brain; Cerebral blood flow; Chronic pain; Cognitive ability; Contraindications; Correlation analysis; Drug abuse; Frontal gyrus; Functional magnetic resonance imaging; functional MRI; Magnetic resonance imaging; Metabolism; Neuralgia; Neuroimaging; Neuroscience; Pain perception; Pathogenesis; Patients; Perfusion; Spin labeling; Structure-function relationships; Thalamus; Trigeminal nerve; trigeminal neuralgia; functional MRI; cerebral blood flow; chronic pain; brain; trigeminal neuralgia; arterial spin labeling
• ISSN: 1662-4548; 1662-453X; 1662-453X
• DOI: 10.3389/fnins.2022.1065411

Accumulating evidence suggests that trigeminal neuralgia (TN) causes structural and functional alterations in the brain. However, only a few studies have focused on cerebral blood flow (CBF) changes in patients with TN. This study aimed to explore whether altered cerebral perfusion patterns exist in patients with TN and investigate the relationship between abnormal regional CBF (rCBF) and clinical characteristics of TN. This study included 28 patients with TN and 30 age- and sex-matched healthy controls (HCs) who underwent perfusion functional MRI (fMRI) of the brain using pseudo-continuous arterial spin labeling (pCASL) in the resting state. The regions of significantly altered CBF in patients with TN were detected using group comparison analyses. Then, the relationships between the clinical characteristics and abnormal rCBF were further investigated. Compared to the control group, patients with TN exhibited increased rCBF, primarily in the thalamus, middle frontal gyrus (MFG), and left insula. Furthermore, the CBF values of the thalamus were negatively correlated with the pain intensity of TN and positively correlated with pain duration in patients with TN. Primary alterations in rCBF in patients with TN occurred in different brain regions related to pain, which are involved in cognitive-affective interaction, pain perception, and pain modulation. These results indicate that non-invasive resting cerebral perfusion imaging may contribute complementary information to further understanding the neuropathological mechanism underlying TN.