Recruitment of the left precentral gyrus in reading epilepsy: A multimodal neuroimaging study

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• 作者：Dima Safi^a ; ^b ; ^{dima.safi@uqtr.ca" class="auth_mail" title="E-mail the corresponding author} ; René ; e Bé ; land^c ; Dang Khoa Nguyen^d ; Philippe Pouliot^e ; Ismail S. Mohamed^f ; Phetsamone Vannasing^a ; Julie Tremblay^a ; Maryse Lassonde^a ; Anne Gallagher^a ; ^g
• 关键词：Reading epilepsy ; Multimodal neuroimaging ; Ictogenesis ; Left precentral gyrus ; Phonological reading ; Lexical reading
• 刊名：Epilepsy & Behavior Case Reports
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：5
• 期：Complete
• 页码：19-22
• 全文大小：784 K

文摘

In a previous study, we investigated a 42-year-old male patient with primary reading epilepsy using continuous video-electroencephalography (EEG). Reading tasks induced left parasagittal spikes with a higher spike frequency when the phonological reading pathway was recruited compared to the lexical one. Here, we seek to localize the epileptogenic focus in the same patient as a function of reading pathway using multimodal neuroimaging.

Methods and results

The participant read irregular words and nonwords presented in a block-design paradigm during magnetoencephalography (MEG), functional near-infrared spectroscopy (fNIRS), and functional magnetic resonance imaging (fMRI) recordings, all combined with EEG. Spike analyses from MEG, fNIRS, and fMRI–EEGs data revealed an epileptic focus in the left precentral gyrus, and spike localization did not differ in lexical and phonological reading.

Conclusion

This study is the first to investigate ictogenesis in reading epilepsy during both lexical and phonological reading while using three different multimodal neuroimaging techniques. The somatosensory and motor control functions of the left precentral gyrus that are congruently involved in lexical as well as phonological reading can explain the identical spike localization in both reading pathways. The concurrence between our findings in this study and those from our previous one supports the role of the left precentral gyrus in phonological output computation as well as seizure activity in a case of reading epilepsy.