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

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 emerging concepts in the neural control of walking and motor learning.

journal_name

J Neurophysiol

authors

Lam T,Dietz V

doi

10.1152/jn.00397.2004

subject

Has Abstract

pub_date

2004-10-01 00:00:00

pages

2010-6

issue

4

eissn

0022-3077

issn

1522-1598

pii

92/4/2010

journal_volume

92

pub_type

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