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

Area of Science:

• Neuroscience
• Biomechanics
• Cognitive Psychology

Background:

• Walking requires attentional resources, and cognitive tasks can interfere with gait and balance.
• Previous studies used non-navigational cognitive tasks, leaving the impact of navigation-specific cognitive load on locomotion unclear.

Purpose of the Study:

• To investigate if increasing the attentional demand of spatial navigation interferes with gait and balance during real-world walking.
• To determine if locomotor control is robust to navigation-related cognitive demands.

Main Methods:

• Healthy adults performed a virtual reality homing task, navigating to previously visited locations.
• Attentional demand was manipulated by progressively removing sensory cues (full, body-based, visual only).
• Gait and balance were assessed using ankle and lumbar trackers.

Main Results:

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

Conclusions:

• Increasing the attentional demand of spatial navigation does not interfere with gait and balance in healthy adults during real-world movement.
• Locomotor control may be inherently robust to cognitive demands associated with spatial navigation.
• Further research is needed to understand the mechanisms underlying this robustness and the precise relationship between navigation and mobility.