Jason Boyle, Ph.DOur nervous system is highly adaptable in perceiving, analyzing and executing movements in relation to an ever-changing perceptual environment. We use vision, knowledge of limb location, and anticipation of force production while simultaneously recognizing variability in our judgment to execute movements through the world around us. Whether it is simple (reaching for a door knob) or complex (threading a needle), goal directed movement has been repeatedly shown to follow a speed/...