Journal
JOURNAL OF MOTOR BEHAVIOR
Volume 36, Issue 2, Pages 137-146Publisher
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.3200/JMBR.36.2.137-146
Keywords
dual task; overlapping-task design; posture; preparatory cues; single-channel model
Funding
- NIA NIH HHS [AG 14116, AG 10009] Funding Source: Medline
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The authors applied an overlapping-task design to study the interaction between postural control and cognitive task processes in young (n = 10) and older (n = 10) adults. A rapid destabilizing floor translation was followed at specific time intervals by a simple auditory reaction time (RT) task. The translations were preceded by either an informational cue or no cue. Interference between postural task demands and the RT task was found only in the first 50 ms. Cueing also had an effect on both the onset of the postural recovery response and RT performance. The results suggest (a) only a brief interference between postural and cognitive processing demands in relatively easy tasks, (b) competition for a common central mechanism, possibly a response selection mechanism, and (c) no differential impact of aging on that interaction.
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