The purpose of this study is to create a database of quantified finger movements. Using the evaluation system with magnetic sensors, the movements of finger tapping are measured and assessed by various indices, such as finger tapping interval, maximum amplitude of finger taps, and so on. In this study, the investigators will accumulate the data from healthy subjects for the purpose of applying this evaluation system to diagnosis support of nervous diseases in the future.

Inclusion Criteria:

• Healthy
• Informed consent signed

Exclusion Criteria:

• Renal or hepatic dysfunction
• Severe heart disease
• Under medications for diabetes or hypertension
• Medical history of nervous disease, mental disease, muscular disease, cervical spondylosis, and/or apoplexy
• Feeling difficulty in daily movements
• Taking medicines which possibly affect the motor function of finger tapping.
• Implantation of pacemaker or DBS