Of the left-handers, there were 4 male subjects (25.00%) and 12 female subjects (75.00%), and the average age was 23.37 (±3.34). Of the 20 right handers, there were 13 male subjects (65.00%) and seven female subjects (35.00%), and the average age was 24.42 (±4.04) (Table 1). The subjects did not have any diseases related to the hands, fractures, or past histories of diseases or fractures, and they were normally healthy persons without neurologic disorders. Before the study, the principal investigator explained all procedures to the subjects in detail. All subjects signed an informed consent form, which was approved by the Inje University College of Human Health Science Studies Committee.