Learning effects during human split-belt walking: influence of afferent input

Learning effects during split-belt treadmill walking (different speeds for right and left leg) and the influence of a change in afferent input was investigated. After split-belt walking it was not possible for 10 normal subjects to readjust properly to equal speed for both legs. The effect of learning could be influenced by altering the speed regulation strategy and by unloading of the subjects. Hand regulation of speed showed a more pronounced effect of learning than feet regulation. It is suggested that feet regulation performs better speed regulation most probably due to a more natural feedback mechanism. Unloading enables the subjects to adjust equal speed better. Load receptors are suggested to play an important role for the effect of learning during split belt walking.