Altering sensory cues for spatial navigation does not impose a dual-task effect on gait and balance

Area of Science:

• Neuroscience
• Biomechanics
• Human Movement Science

Background:

• Walking requires attention, and cognitive tasks can interfere with gait and balance.
• Previous studies used lab-based tasks, limiting understanding of real-world cognitive-motor interactions.

Purpose of the Study:

• To investigate if increased attentional demand of spatial navigation affects gait and balance during real-world movement.
• To examine the robustness of locomotor control under cognitive load.

Main Methods:

• Healthy adults performed a virtual reality homing task, navigating in an ambulatory environment.
• Attentional demand was manipulated by progressively removing sensory cues (full, visual only, self-motion only).
• Gait and balance were measured using ankle and lumbar trackers.

Main Results:

• Navigation performance decreased as sensory cues were removed, indicating increased cognitive demand.
• No significant changes were observed in spatiotemporal gait or balance metrics.
• Locomotor control remained stable despite increased attentional demands of navigation.

Conclusions:

• Increased attentional demand during spatial navigation does not interfere with gait and balance in healthy adults.
• Locomotor control appears robust to navigation-related cognitive demands in this population.
• Further research is needed to understand the mechanisms behind this dissociation.