Cognitive effects of topiramate revealed by standardised low-resolution brain electromagnetic tomography (sLORETA) of event-related potentials

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• 作者：Ki-Young Jung ; Jae-Wook Cho ; Eun Yeon Joo ; Sun Hwa Kim ; Kyung Mook Choi ; Juhee Chin ; Kun-Woo Park ; Seung Bong Hong
• 关键词：Topiramate ; Cognitive function ; Event-related potential (ERP) ; Standardised low-resolution electromagnetic tomography (sLORETA) ; Source localisation
• 刊名：Clinical Neurophysiology
• 出版年：2010
• 出版时间：September 2010
• 年：2010
• 卷：121
• 期：9
• 页码：1494-1501
• 全文大小：667 K

文摘

Objective

To evaluate the effect of topiramate (TPM) on event-related potentials (ERPs) in patients with epilepsy.

Methods

Neuropsychological tests and ERP study using auditory oddball paradigm were conducted before and after treatment with TPM in drug-naive epilepsy patients. To detect target brain regions in which ERP changed during the cognitive task, cortical current densities of ERP components were analysed using standardised low-resolution electromagnetic tomography (sLORETA).

Results

Neuropsychological tests (n = 18 patients) showed that TPM significantly decreased the score in digit span, Corsi block and Controlled Oral Word Association word fluency. Repeated-measures analysis of variance of ERP data (n = 13 patients) revealed that P2 amplitude was significantly increased at Fz electrode following treatment with TPM. Statistical non-parametric map of sLORETA between pre- and post-TPM ERPs revealed that current density of P200 component was significantly reduced by TPM in bilateral parieto-occipital, temporolimbic and dorsolateral right prefrontal regions.

Conclusions

Our findings suggest that TPM affects selective brain regions which may be related to cognitive side effects.

Significance

Source localisation of ERPs can be helpful in identifying target brain regions for the cognitive side effects of anti-epileptic drugs.