• Ayataka Fujimoto, Tohru Okanishi, Mitsuyo Nishimura, Sotaro Kanai, Keishiro Sato, and Hideo Enoki.
• Seirei Hamamatsu General Hospital, Comprehensive Epilepsy Center, Japan. Electronic address: ataka_fuji@sis.seirei.or.jp.
• J Clin Neurosci. 2017 Nov 1; 45: 319-323.

IntroductionCerebral hemispherotomy is a surgical method with a high rate of seizure reduction in patients with intractable epilepsy. However, there is a probability of postoperative motor deficits. The objective of this study was to investigate whether the Wada test can help predict motor function outcomes after hemispherotomy and, therefore, may be useful in decision-making and patient selection.Patients And MethodA total of 13 patients with hemispherical intractable epilepsy underwent hemispherical disconnection surgeries. Six of them underwent the Wada test to evaluate motor function and language function followed by peri-insula hemispherotomy. The patients' age ranged from 11 to 45years (mean 27years).ResultsThree of six patients had reduced dexterity on the Wada test. The finger motor function in the other patients did not change on the Wada test. Postoperatively, all patients who had decreased fine motor movement on the Wada test showed postoperative clumsiness of their hands and fingers.ConclusionsThe Wada test might predict postoperative fine finger motor deficit after hemispherotomy. This study showed that gross motor function was compensated in the ipsilateral hemisphere, whereas fine finger motor movement function remained in the contralateral frontal cortex.Copyright © 2017 Elsevier Ltd. All rights reserved.

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