Neurological disorders cause untold suffering and financial burden to hundreds of thousands of people, not only to the patients, but also the relatives and society. As of today, though numerous scientists and clinicians have devoted their efforts to understand and combat these diseases, there is still no cure or satisfactory solution to the problems. Furthermore, the brain is the most essential organ of a human being. Realizing the importance of the brain, the president of the United States, George Bush, declared the 90s as the Decade of the Brain in January, 1992. Being in neuroscience...