Manual interception of moving targets II. On-line control of overlapping submovements

摘要: We studied the kinematic characteristics of arm movements and their relation to a stimulus moving with wide range velocity acceleration. The target traveled at constant acceleration, deceleration, or for 0.5–2.0 s, until it arrived location where was required be intercepted. For fast targets, subjects produced single symmetrical, bell-shaped profiles. In contrast, slowly hand profiles displayed multiple peaks, which suggests control mechanism that produces series discrete submovements according motion. To analyze how temporal spatial aspects these are influenced by motion, we decomposed vertical into pulses minimum-jerk model. number roughly proportional movement time, resulting in relatively submovement frequency (∼2.5 Hz). On other hand, onset asynchrony showed significantly more variability than intersubmovement interval, indicating delayed following longer duration. Examination amplitude its motion revealed achieved interception mainly producing would keep displacement first-order estimate position end each along axis movement. Finally, did not find any evidence information regarding acceleration is properly utilized production submovements.