Differences in Postural Control Associated With Aging and Executive Function

Area of Science:

• Gerontology
• Biomechanics
• Human Movement Science

Background:

• Postural instability is a key indicator of age-related functional decline and increases fall risk.
• Understanding age-related differences in postural control is crucial for developing targeted interventions.

Purpose of the Study:

• To investigate postural control in young, older, and at-risk older adults during stationary standing.
• To analyze postural sway and cumulative lower limb angles under varying stability and cognitive load conditions.

Main Methods:

• Participants (young, older, at-risk older adults) stood in stable, unstable, and cognitively demanding unstable conditions.
• Postural control was measured using center-of-gravity sway and lower limb angular velocity sensors.

Main Results:

• Older adults demonstrated reduced executive function and increased postural sway compared to young adults.
• Increased cumulative ankle, knee, and hip joint angles were observed in older adults under unstable conditions.
• Similar deficits in postural control were noted under unstable and attention-dispersing conditions.

Conclusions:

• Older adults and those at risk of falls exhibit significant postural instability.
• Age-related postural control strategies differ from those of younger individuals, particularly when balance is challenged.