Subject performing a motion analysis test for the "Biomechanics of Movement During Locomotion" experiment. During treadmill locomotion, two targets were placed at different distances from the subject for visual fixation to characterize changes in strategy associated with different goal-directed gaze tasks. Markers were placed on the head, neck and torso to measure head and trunk movements. Leg movements were measured by placing markers on the feet, ankles, knees and hips. The movements of these markers were simultaneously recorded with four video cameras. The position of each marker was uniquely determined using a video-based motion analysis system.
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