Effect of preparation on dual-task performance in postural control

Area of Science:

• Neuroscience
• Biomechanics
• Cognitive Psychology

Background:

• Understanding the interplay between motor control and cognitive processes is crucial for human performance.
• Aging can affect both motor and cognitive functions, but its impact on their interaction is not fully understood.

Purpose of the Study:

• To investigate the interaction between postural control and cognitive task performance in young and older adults.
• To determine the temporal dynamics of interference between postural and cognitive demands.
• To examine the role of cueing in modulating this interaction.

Main Methods:

• An overlapping-task design was employed, combining destabilizing floor translations with auditory reaction time tasks.
• Participants included young (n=10) and older (n=10) adults.
• Trials were either preceded by an informational cue or no cue.

Main Results:

• Brief interference (within 50 ms) was observed between postural and cognitive task demands.
• Cueing influenced both postural recovery onset and reaction time performance.
• No significant age-related differences were found in the interaction between postural control and cognitive processing.

Conclusions:

• Postural and cognitive processing interact briefly, likely due to competition for a common response-selection mechanism.
• These findings suggest that simple tasks do not reveal age-related differences in the interaction between motor and cognitive functions.
• The results highlight the dynamic nature of dual-task processing and the shared neural resources involved.