Transfer of motor performance in an obstacle avoidance task to different walking conditions

Journal of Neurophysiology
Tania Lam, V Dietz

Abstract

The aim of this study was to examine whether subjects who have learned a skilled locomotor task can transfer the acquired performance to conditions involving either a change in the external coordinates or in the sensory input from one leg. Subjects were trained to step over an obstacle with minimal foot clearance without visual information about either the obstacle or their legs during treadmill walking. Leg muscle activity and joint kinematics were recorded and analyzed. Acoustic signals provided feedback about foot clearance over the obstacle. After successful training, the transfer of learning between level and downhill walking and to walking with additional weight attached to the leg was examined. It was found that once subjects learned to step over the obstacle at an optimal foot clearance, they could transfer their performance within the first step over the obstacle in the new walking conditions. Closer examination of the transfer between level and downhill walking revealed no consistent kinematic strategy across subjects. To transfer the learned performance to walking with additional weight, subjects consistently and automatically increased biceps femoris muscle activation. The results are discussed in the context of eme...Continue Reading

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Oct 25, 2006·Experimental Brain Research·Jason T RichardsJacob J Bloomberg
Nov 6, 2009·Journal of Neurophysiology·Erin V L Vasudevan, Amy J Bastian
Oct 18, 2007·The Journal of Orthopaedic and Sports Physical Therapy·Nirit Rotem-Lehrer, Yocheved Laufer
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Oct 21, 2016·Experimental Brain Research·Taha QaiserTania Lam
May 27, 2011·Journal of Neurophysiology·M Scott AlexanderDaniel S Marigold

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