Investigating age-related decline in sensorimotor control using robotic tasks

Area of Science:

• Neuroscience
• Biomechanics
• Gerontology

Background:

• Aging is linked to sensorimotor control changes, impacting function and increasing fall risk.
• Current motor assessments often lack objectivity, necessitating quantitative tools.

Purpose of the Study:

• To develop and validate robot-based tasks for assessing age-related sensorimotor performance differences.
• To compare sensorimotor capabilities between young and older adults using novel robotic evaluations.

Main Methods:

• Three robot-based tasks using the vBOT manipulandum were designed for bimanual and unimanual movements under altered dynamics.
• Tasks included motor learning, object-like force fields, and viscous force fields to challenge sensorimotor control.
• Evaluated healthy young (<35 years) and older (>60 years) adults, comparing dominant and non-dominant arm performance.

Main Results:

• All tasks revealed age-related sensorimotor performance deficits.
• The viscous resistance task was most sensitive, detecting declines in movement speed, force, and response time.
• Older adults exhibited slower movements, longer task completion times, lower peak forces, and delayed response onset compared to younger adults.

Conclusions:

• Robot-based tasks provide objective, quantitative metrics for age-related sensorimotor decline.
• These tasks can sensitively detect functional changes associated with aging.
• Findings support the use of robot-based assessments for clinical evaluation and monitoring of sensorimotor health in aging populations.