1. Department of Neurological Diagnosis and Restoration Graduate School of Medicine Osaka University Yamadaoka 2‐2 Suita Osaka565‐0871Japan
2. Department of Neurosurgery Otemae Hospital Chuo‐ku Otemae 1‐5‐34 Osaka Osaka540‐0008Japan
3. Endowed Research Department of Clinical Neuroengineering Global Center for Medical Engineering and Informatics Osaka University Yamadaoka 2‐2 Suita Osaka565‐0871Japan
4. Department of Organismal Biology and Anatomy The University of Chicago 1027 E 57th St Chicago IL60637
5. Department of Anatomy and Physiology Saga Medical School Faculty of Medicine Saga University Nabeshima 5‐1‐1 Saga Saga849‐8501Japan
6. Department of Neurosurgery Graduate School of Medicine Osaka University Yamadaoka 2‐2 Suita Osaka565‐0871Japan