Abstract
Recent work (McFadyen and Winter 1991) has shown that anticipatory locomotor adjustments (ALA's) for clearing mid-swing obstacles result in the reorganization of lower limb motor strategies towards active knee flexion. The present work studies obstacles set to 10% of each subject's leg length and placed near, mid-way or far from the foot about to clear the obstacle. Results show the robustness of the ALA which shows increased knee flexor involvement as the obstacle is placed closer to the subject. As well, the possibility of a decoupling of ankle control from hip/knee patterning as a function of obstacle proximity is discussed.
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