Effects of the Central Executive on Postural Control

Area of Science:

• Cognitive Neuroscience
• Motor Control
• Human Physiology

Background:

• Working memory (WM) is crucial for cognitive function.
• Postural control is essential for daily activities.
• The interplay between cognitive load and motor performance is an area of ongoing research.

Purpose of the Study:

• To investigate the relationship between individual working memory capacity and postural control.
• To determine if lower working memory capacity affects balance during different tasks.
• To examine the impact of dual-tasking on postural stability in individuals with varying working memory spans.

Main Methods:

• Seventy-nine young adults were categorized into low- and high-working memory span groups using the Reading Span Test.
• Postural control was assessed by measuring the length of unrest during single-leg and double-leg standing.
• Tasks included single and dual-task conditions, with the dual-task involving a cognitive challenge.

Main Results:

• A significant increase in postural sway was observed in the low-span group compared to the high-span group during the single-leg standing, dual-task condition.
• Dual-task interference on postural control was evident in the low-span group, particularly under more demanding postural conditions.
• No significant differences were found between groups in simpler, single-task conditions.

Conclusions:

• Lower working memory capacity is associated with impaired postural control, especially when cognitive and physical demands are high.
• Cognitive load, mediated by working memory capacity, significantly impacts balance and stability.
• These findings suggest that individuals with limited working memory may be at a higher risk of falls in complex environments.