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Attentional demands associated with obstacle crossing while carrying a load
Kara M Hawkins1, Carolyn J Perry, Jeevaka B Kiriella
1Neuroscience Graduate Diploma Program, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.
Journal of Motor Behavior
|January 11, 2011
Summary
Carrying loads while navigating obstacles increases cognitive load, particularly when vision is impaired or the load is heavier. This impacts attentional demands during locomotor tasks.
Area of Science:
- Biomechanics
- Cognitive Neuroscience
- Human Locomotion
Background:
- The cognitive control required for various locomotor tasks is not fully understood.
- Investigating attentional demands during obstacle negotiation while carrying loads is crucial for understanding complex movements.
Purpose of the Study:
- To examine how carrying an anterior load affects cognitive load during obstacle clearance.
- To determine the relationship between load magnitude, visual occlusion, and attentional demands.
Main Methods:
- Nine healthy males performed walking trials under four conditions: no load, and carrying 2KG, 5KG, or 10KG.
- Cognitive load was measured using a probe reaction time (PRT) test during lead limb obstacle crossing.
- Trials included conditions with and without visual occlusion of the obstacle by the load.
Main Results:
- A significant, load-dependent increase in PRT was observed.
- PRT increased progressively with load magnitude (2KG > NL, 5KG/10KG > 2KG).
- Increased cognitive load was associated with visual occlusion of the obstacle and higher load mass.
Conclusions:
- Carrying anterior loads increases cognitive load during obstacle crossing.
- The degree of cognitive demand is influenced by load magnitude and visual obstruction.
- Findings highlight the interplay between motor tasks, cognitive control, and physical load.
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