Does motor expertise facilitate amplitude differentiation of lower limb-movements in an asymmetrical bipedal coordination task?
Publication year
2018Author(s)
Number of pages
11 p.
Source
Human Movement Science, 59, (2018), pp. 201-211ISSN
Publication type
Article / Letter to editor
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Organization
SW OZ DCC CO
Rehabilitation
IQ Healthcare
Orthopaedics
Journal title
Human Movement Science
Volume
vol. 59
Languages used
English (eng)
Page start
p. 201
Page end
p. 211
Subject
Action, intention, and motor control; DI-BCB_DCC_Theme 2: Perception, Action and Control; Radboudumc 18: Healthcare improvement science RIHS: Radboud Institute for Health Sciences; IQ Healthcare - Radboud University Medical Center; Orthopaedics - Radboud University Medical Center; Radboud University Medical Center; Rehabilitation - Radboud University Medical CenterAbstract
The motor system's natural tendency is to move the limbs over equal amplitudes, for example in walking. However, in many situations in which people must perform complex movements, a certain degree of amplitude differentiation of the limbs is required. Visual and haptic feedback have recently been shown to facilitate such independence of limb movements. However, it is unknown whether motor expertise moderates the extent to which individuals are able to differentiate the amplitudes of their limb-movements while being supported with visual and haptic feedback. To answer this question 14 pre-professional dancers were compared to 14 non-dancers on simultaneously generating a small displacement with one foot, and a larger one with the other foot, in four different feedback conditions. In two conditions, haptic guidance was offered, either in a passive or active mode. In the other two conditions, veridical and enhanced visual feedback were provided. Surprisingly, no group differences were found regarding the degree to which the visual or haptic feedback assisted the generation of the different target amplitudes of the feet (mean amplitude difference between the feet). The correlation between the displacements of the feet and the standard deviation of the continuous relative phase between the feet, reflecting the degree of independence of the feet movements, also failed to show between-group differences. Sample entropy measures, indicating the predictability of the foot movements, did show a group difference. In the haptically-assisted conditions, the dancers demonstrated more predictable coordination patterns than the non-dancers as reflected by lower sample entropy values whereas the reverse was true in the visual-feedback conditions. The results demonstrate that motor expertise does not moderate the extent to which haptic tracking facilitates the differentiation of the amplitudes of the lower limb movements in an asymmetrical bipedal coordination task.
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- Faculty of Medical Sciences [93461]
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- Open Access publications [107738]
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