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Biomechanical and cognitive interactions during Visuo Motor Targeting Task.

Hossein Mokhtarzadeh1, Jason D Forte2, Peter Vee-Sin Lee1

  • 1Department of Biomedical Engineering, University of Melbourne, Parkville, VIC 3010, Australia.

Gait & Posture
|April 8, 2021
PubMed
Summary
This summary is machine-generated.

Performing a visual search task while walking improves stability at higher speeds, demonstrating cognitive-motor interference. This finding has implications for understanding postural control and fall risk in various neurological conditions.

Keywords:
CAREN systemCognitive Motor Interferences (CMI)Cost of dual-taskGait performanceVisual search performanceVisuo Motor Targeting Task

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Area of Science:

  • Biomechanics
  • Neuroscience
  • Human Movement Science

Background:

  • Cognitive-Motor Interference (CMI) describes how cognitive tasks impact primary motor functions like walking.
  • The effect of simultaneous cognitive tasks on walking stability, particularly at varying speeds, remains under-investigated.

Purpose of the Study:

  • To investigate if a Visuo Motor Targeting Task (VMTT) affects visual search performance and margin of stability (MoS) during gait.
  • To determine how gait speed influences cognitive-motor interference during a visual search task.

Main Methods:

  • Utilized the Computer Assisted Rehabilitation ENvironment (CAREN) for a controlled study.
  • Twenty male participants performed a visual search task while walking at speeds of 0.55, 1.11, and 1.67 m/s, or while stationary.
  • Assessed visual search performance and margin of stability (MoS) to quantify the cost of the cognitive task.

Main Results:

  • Margin of stability (MoS) in the mediolateral direction significantly improved with increased gait speed and during the visual search task.
  • A significant interaction showed greater MoS improvement during the visual search task at higher gait speeds.
  • Visual performance and the cost of visual search were enhanced during walking compared to standing, up to 25%.

Conclusions:

  • Simultaneous visual search and walking can enhance postural stability, particularly at higher speeds.
  • Understanding Cognitive-Motor Interference (CMI) is crucial for addressing postural control deficits and fall risks in neurological disorders.