Masami Tanaka1, Masako Kinoshita2, Keiko Tanaka3. 1. Department of Neurology, Utano National Hospital, Kyoto, Japan nra17777@nifty.com. 2. Department of Neurology, Utano National Hospital, Kyoto, Japan. 3. Department of Neurology, Kanazawa Medical University, Uchinada. 920-0265, Japan.