![]() However, only a few studies have investigated the impact of the cognitive tasks separately, also referred to as cognitive cost, and the impact of speech production on gait and posture. The interactions between postural control, motor control and cognitive load have been previously highlighted. This may be particularly important for the choice of the test and understanding postural control disorders. Mobility is more affected by SP when the cognitive task is complex. There was an increase in TUG associated with the cognitive load, but the mental or oral aspect did not seem to have an influence. The SP, but not the CL, had a significant effect on oscillation velocity. There was a significant increase in the centre of pressure oscillation velocity in static balance when the dual task was performed orally compared to the control situation The DTC was more pronounced for the O than for the M. We evaluated the dual-task cost (DTC) and the effect of speech production (SP) and the level of cognitive load (CL) on these variables. A control situation and two different cognitive arithmetic tasks were tested: counting backward in increments of 3 and 7 under oral (O) and mental (M) conditions during static balance and the TUG. Thirty healthy young subjects (25 ± 4 years old, 17 women) participated in this study. ![]() The aim of this study was to analyse the influence of speech production and cognitive load levels on static balance and timed up and go (TUG) during dual-task activities. The interaction between oral and/or mental cognitive tasks and postural control and mobility remains unclear. ![]()
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