Abstract

Stepping in place without vision is a spatial orientation task that is associated with unperceived foot displacements. This study was aimed at determining whether foot displacement variability is modified by a concurrent cognitive task. Fourteen young adults stepped for 50 steps with their vision blocked and performed a continuous mental counting task. 3-D Kinematic data from both feet (heel and big toe) was recorded. The variability of foot displacements was either unchanged or slightly lower in dual task, while the foot displacements were significantly shorter (p < 0.05) in dual task than without the cognitive task. The results suggest that the concurrent cognitive task might have allowed a better control of the repetitive lower limb movements.

摘要

在没有视觉的情况下就地踏步是一项空间定向任务，与未察觉的足部位移相关。本研究旨在确定同时认知任务是否会改变足部位移变异性。14 名年轻人在视力受阻的情况下走了 50 步，并进行了连续的心算任务。记录了双脚（脚跟和大脚趾）的 3-D 运动学数据。双任务中足位移的变异性没有变化或略低，而双任务中足位移显着短于没有认知任务的足位移（p < 0.05）。结果表明，并发的认知任务可能可以更好地控制重复的下肢运动。