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Related Concept Videos

Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...

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Related Experiment Video

Updated: Jun 17, 2026

Experimental Methods to Study Human Postural Control
08:12

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Age-related changes in posture control are differentially affected by postural and cognitive task complexity.

L Bernard-Demanze1, M Dumitrescu, P Jimeno

  • 1Laboratoire de Modélisation des Activités Sportives, Domaine Universitaire de Savoie-Technolac - 73376 Le Bourget du Lac Cedex, France.

Current Aging Science
|December 22, 2009
PubMed
Summary
This summary is machine-generated.

Older adults show impaired balance control during dual-tasking, unlike younger adults who improve. This highlights age-related differences in attention allocation and task prioritization for maintaining stability.

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Area of Science:

  • Gerontology
  • Neuroscience
  • Biomechanics

Background:

  • Quiet standing, a basic postural task, is often combined with cognitive activities.
  • Simultaneous balance and cognitive tasks create attentional resource competition.
  • Aging impairs attentional resource allocation, increasing fall risk.

Purpose of the Study:

  • Investigate age-related changes in posture control during dual-task performance.
  • Compare younger, middle-aged, and older adults' responses to combined postural and cognitive tasks.
  • Evaluate the sensitivity of different analysis methods for detecting age-related performance differences.

Main Methods:

  • Employed a dual-task paradigm combining static (quiet standing) and dynamic (force plate) postural tasks with low (mental arithmetic) and high (spatial memory) cognitive tasks.
  • Analyzed center-of-pressure displacements using statistical (sway area/velocity) and nonlinear (wavelet transform) methods.
  • Included three age groups: younger, middle-aged, and older healthy participants.

Main Results:

  • Nonlinear analysis was more sensitive than traditional methods in differentiating age-group performance.
  • Dual-tasking costs varied with postural task difficulty and cognitive task complexity.
  • Younger adults improved postural performance under dual-task conditions, while older adults' performance declined.
  • Balance recovery strategies differed between younger and older adults in the dynamic task.

Conclusions:

  • Age-related differences in dual-tasking performance are evident, with older adults showing decrements.
  • Task prioritization strategies differ with age: younger adults automate posture control, while older adults prioritize it.
  • Findings underscore the importance of considering attentional demands in fall prevention strategies for older adults.