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Exploring motor-cognitive interference in children with Down syndrome using the Trail-Walking-Test
Thomas Jürgen Klotzbier1, Katharina Bühler1, Benjamin Holfelder1
1Department of Sport and Exercise Science, University of Stuttgart, Allmandring 28, 70569, Stuttgart, Germany.
Background And Aims:
The dual-task (DT) paradigm is an ecologically valid approach to assess cognitive function in relation with motor demands, particularly for children with Down syndrome (DS). This study aimed to determine DT performance for a complex Change-of-Direction (CoD_W) walking task in children with DS.
Methods:
The sample included 12 children with DS (10.2 ± 1.19 years), 12 typically developing (TD) children matched for chronological (TD-CA: 10.2 ± 1.19 years) and 12 TD children matched for mental age (TD-MA: 5.50 ± 1.24 years). We examined DT performance with the Trail-Walking-Test (TWT): participants (1) walked along a fixed pathway, following a prescribed path, delineated by target markers of (2) increasing sequential numbers, and (3) increasing sequential numbers and letters. Motor and cognitive dual-task costs (DTC) were calculated.
Results:
For the TWT, an ANOVA with repeated measures revealed significant differences between DS and the CA, but not the MA group. Overall, there were significant decreases in speed with increasing cognitive demands. In addition, all children produced higher cognitive compared to motor DTC, which were more pronounced in the cognitively more challenging condition.
Conclusion:
The assessment of motor and cognitive performance in a DT paradigm provided insight in how motor and/or cognitive impairment constrains the ability of children to successfully perform activities in a complex and dynamical environment.
