[1] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 701, Taiwan
[2] Natl Cheng Kung Univ Hosp, Dept Neurol, Tainan 704, Taiwan
[3] Case Western Reserve Univ, Ctr Neural Engn, Dept Biomed Engn, Cleveland, OH 44106 USA
[4] Case Western Reserve Univ, Ctr Neural Engn, Dept Neurosci, Cleveland, OH 44106 USA