title: Alternation of regional homogeneity in trigeminal neuralgia after percutaneous radiofrequency thermocoagulation: A resting state fMRI study.
abstract: We used resting-state fMRI to investigate regional homogeneity (ReHo) changes in patients with TN before and after PRT procedure, and to speculate about its possible mechanisms.Thirty-one TN patients underwent the PRT procedure had MRI scans just before and 6 months after surgery. The anatomical and resting-state functional images were all acquired. Patients' visual analog scales (VAS) scores, facial numbness, and disease duration were also recorded. Voxel-wise ReHo analysis was performed to detect the altered regional clusters after surgery. The correlations between the mean ReHo values of each significant cluster and clinical variables were examined.Compared with presurgical condition, patients after the PRT procedure showed a significant ReHo value increases in the right fusiform gyrus (FG) and bilateral anterior cingulate cortex (ACC), but decreases in the left inferior parietal lobule (IPL), right calcarine, right middle temporal gyrus (MTG), left postcentral gyrus (PoCG), and left insula. We demonstrated a positive correlation between ReHo in the left PoCG and VAS scores, a negative correlation between pre-surgical ReHo in the right MTG and VAS changes (ΔVAS).Alterations of ReHo post-surgical were found in several regions, which are related to sensory, affective, and emotional processes. The MTG may be a specific area that is associated with analgesic efficiency of PRT procedure.
authors.affiliation: Department of Pain Management, Xuanwu Hospital Capital Medical University School of Biomedical Engineering, Capital Medical University Department of Radiology, Xuanwu Hospital Capital Medical University, Beijing, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Dou
authors.forename: Xueyi
authors.initials: X
authors.lastname: Zhang
authors.forename: Liqiang
authors.initials: L
authors.lastname: Yang
authors.forename: Wanqian
authors.initials: W
authors.lastname: Wang
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.forename: Zhicheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Jiaxiang
authors.initials: J
authors.lastname: Ni
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging*; D004564:Electrocoagulation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012146:Rest; D012189:Retrospective Studies; D014277:Trigeminal Neuralgia / Q000175:diagnosis / Q000601:surgery*