1. Department of Physical Therapy College of Life Sciences Chubu University Matsumoto‐cho Kasugai 487‐8501 Japan
2. Department of Neuroscience II Research Institute of Environmental Medicine Nagoya University Nagoya 464‐8601 Japan
3. Department of Anatomy and Neuroscience Hyogo College of Medicine Mukogawa‐cho Nishinomiya 663‐8501 Japan
4. Department of Physical Therapy Faculty of Rehabilitation Niigata University of Health and Welfare 1398 Shimami‐cho, Kita‐ku Niigata 950‐3198 Japan
5. Institute for Human Movement and Medical Sciences Niigata University of Health and Welfare 1398 Shimami‐cho, Kita‐ku Niigata 950‐3198 Japan
6. Department of Physiology Nihon University School of Dentistry 1‐8‐13 Kandasurugadai, Chiyoda‐ku Tokyo 101‐8310 Japan