Altered white matter integrity in temporal lobe epilepsy: Association with cognitive and clinical profiles

Jeffrey D. Riley, David L. Franklin, Vicky Choi, Ronald C. Kim, Devin K. Binder, Steven C. Cramer, Jack J. Lin
2010 Epilepsia  
Purpose-Diffusion tensor imaging (DTI) studies have reported substantial white matter abnormalities in patients with temporal lobe epilepsy (TLE). However, limited data exist regarding the extent of white matter tract abnormalities, cognitive effects of these abnormalities, and relationship to clinical factors. The current study examined these issues in subjects with chronic TLE. Methods-DTI data were obtained in 12 TLE subjects and 10 age-matched healthy controls. Voxelwise statistical
more » ... of fractional anisotropy (FA) was carried out using tract-based spatial statistics (TBSS). White matter integrity was correlated with cognitive performances and epilepsyrelated clinical parameters. Results-Subjects with TLE, as compared to healthy controls, demonstrated four clusters of reduced FA, in anterior temporal lobe, mesial temporal lobe, and cerebellum ipsilateral, as well as frontoparietal lobe contralateral, to the side of seizure onset. Mean FA was positively correlated with delayed memory, in anterior temporal lobe; immediate memory, in mesial temporal lobe. Lower FA values in the posterior region of corpus callosum were related to earlier age of seizure onset. Conclusion-TLE is associated with widespread disturbances in white matter tracts and these changes have important cognitive and clinical consequences. Keywords temporal lobe epilepsy; diffusion tensor imaging; cognition; age of seizure onset Please send correspondence to: Jack J. Lin
doi:10.1111/j.1528-1167.2009.02508.x pmid:20132296 pmcid:PMC2929974 fatcat:agckc3k5dzhg7kpfqywqw6sjcq