○Roland Philipp¹, Naohito Ohta^1,2, Yutaro Takayama³, Yuki Hara⁴, Tetsuro Funato², Kazuhiko Seki¹ (1. National Center of Neurology and Psychiatry, Department of Neurophysiology, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 1878502, Japan, 2. University of ElectroCommunications, Graduate School of Informatics and Engineering, Dept. of Mechanical and Intelligent Systems Engineering. W2-217, 1-5-1 Chofugaoka, Chofu, Tokyo, Japan, 3. Yokohama City University, Department of Neurosurgery , Graduate School of Medicine, 3-9 Kanazawa Ward, 236-0004 Yokohama City, Kanagawa Prefecture, 4. National Center of Neurology and Psychiatry, Department of Orthopaedic Surgery, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 1878502, Japan)