TY  - JOUR
PY  - 2012//
TI  - Dual-tasking interferes with obstacle avoidance reactions in healthy seniors
JO  - Gait and posture
A1  - Hegeman, Judith
A1  - Weerdesteyn, Vivian
A1  - van den Bemt, Bart
A1  - Nienhuis, Bart
A1  - van Limbeek, Jacques
A1  - Duysens, Jacques
SP  - 236
EP  - 240
VL  - 36
IS  - 2
N2  - Dual-tasking can lead to falls, as does a deterioration of obstacle avoidance (OA) skills. Hence, it is expected that a combination of both would be even more detrimental, especially when OA is time-critical. Previous studies confirmed this expectation, however, due to several limitations in their design it is yet too early to draw any definitive conclusions on the allocation of attentional resources in OA under dual-task conditions. Therefore, attentionally demanding primary and secondary tasks were used with the instruction to perform as well as possible on both tasks. Nineteen healthy senior individuals (60±4.7 years, 8 females) performed an OA task on a treadmill while walking at 3km/h as a single task and combined with an auditory Stroop task. Biceps femoris (BF) muscle response times, OA failure rates and composite scores were used to evaluate the data. Increased OA failure rates (3%, p=0.03) and delayed BF response times (21ms, p<0.001) were found under dual-task conditions. Composite scores were reduced during (p<0.001) and just after obstacle crossing (p=0.003). In conclusion, dual-tasking during time-critical OA affects the motor as well as the cognitive task when subjects are instructed to keep up performance on both tasks. This adds to the evidence indicating an increased risk of tripping or falling when attention is divided during walking in the presence of unexpected obstacles.<p />  <p>Language: en</p>
LA  - en
SN  - 0966-6362
UR  - http://dx.doi.org/10.1016/j.gaitpost.2012.02.024
ID  - ref1
ER  -