A resting‐state fMRI study of temporal lobe epilepsy using multivariate pattern analysis and Granger causality analysis. Issue 5 (7th June 2022)

• Record Type: Journal Article
• Authors: Hao, Siyao; Duan, Ying; Qi, Lei; Li, Zhimei; Ren, Jiechuan; Nangale, Naluyele; Yang, Chunlan
• Is Part Of: Journal of neuroimaging. Volume 32:Issue 5(2022)
• Page Start: 977
• Page End: 990
• Publication Date: 2022-06-07
• Subjects: effective connectivity -- Granger causality analysis -- multivariate pattern analysis -- regional homogeneity -- resting‐state functional magnetic resonance imaging -- temporal lobe epilepsy; Diagnostic imaging -- Periodicals; Nervous system -- Diseases -- Diagnosis -- Periodicals; Imagerie pour le diagnostic -- Périodiques; Système nerveux -- Maladies -- Diagnostic -- Périodiques; Imagerie médicale; Neuroimagerie; Neurologie; Système nerveux; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); 616.804754
• DOI: 10.1111/jon.13012
• Languages: English
• ISSNs: 1051-2284

Abstract

Abstract: Background and Purpose: Understanding the pathogenesis of temporal lobe epilepsy (TLE) is essential for its diagnosis and treatment. The study aimed to explore regional homogeneity (ReHo) and changes in effective connectivity (EC) between brain regions in TLE patients, hoping to discover potential abnormalities in certain brain regions in TLE patients. Methods: Resting‐state functional magnetic resonance data were collected from 23 TLE patients and 32 normal controls (NC). ReHo was used as a feature of multivariate pattern analysis (MVPA) to explore the ability of its alterations in identifying TLE. Based on the results of the MVPA, certain brain regions were selected as seed points to further explore alterations in EC between brain regions using Granger causality analysis. Results: MVPA results showed that the classification accuracy for the TLE and NC groups was 87.27%, and the right posterior cerebellum lobe, right lingual gyrus (LING_R), right cuneus (CUN_R), and left superior temporal gyrus (STG_L) provided significant contributions. Moreover, the EC from STG_L to right fusiform gyrus (FFG_R) and LING_R and the EC from CUN_R to the right occipital superior gyrus (SOG_R) and right occipital middle gyrus (MOG_R) were altered compared to the NC group. Conclusion: The MVPA results indicated that ReHo abnormalities in brain regions may be an important feature in the identification of TLE. The enhanced EC from STG_L to FFG_R and LING_R indicates a shift in language processing to the right hemisphere, and the weakened EC from SOG_R and MOG_R to CUN_R may reveal an underlying mechanism of TLE.