The goal of this study is to determine whether movements produced on a vertical surface differ in their performance level and muscle activation patterns compared to movements produced on a horizontal surface. The investigators predict that the level of performance on the vertical surface will exceed the level of performance on the horizontal surface. Additionally, the investigators hypothesize that the proximal muscles will be more activated and fatigued (in longer tasks) while drawing on the vertical surface, while the distal muscle will be more activated and fatigued while drawing on the horizontal surface.