The effect of predictable and unpredictable motor tasks on postural control after traumatic brain injury

Ling Zhang, Beatriz C. Abreu, Vera Gonzales, Neil Huddleston, Kenneth Ottenbacher

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This study examined the effects of environmental predictability on postural control during functional reaching while seated in healthy individuals and patients with traumatic brain injury (TBI). The postural perturbation used required reaching to the left versus reaching to the right, while seated, under predictable versus unpredictable conditions. Indexes of postural control - trajectory stability and response reach times - were measured using an electromechanical system in ten patients with TBI and ten healthy subjects. In the TBI group, greater trajectory stability and shorter response reach time were recorded under unpredictable conditions when reaching to both the right and left (d-index 0.57-2.3). In the control group, greater trajectory stability and shorter response time were recorded under predictable and unpredictable environments compared with the TBI group (d-index 0.46-0.95). This study refutes the hierarchical, predictable-to-unpredictable-environment model of postural control evaluation and treatment. The relationship between information processing demands and postural skill appears more complex than a simple linear association. Predictable and unpredictable conditions may be used concurrently, not sequentially, in TBI rehabilitation.

Original languageEnglish (US)
Pages (from-to)225-230
Number of pages6
JournalNeuroRehabilitation
Volume17
Issue number3
StatePublished - 2002

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Automatic Data Processing
Reaction Time
Healthy Volunteers
Rehabilitation
Traumatic Brain Injury
Control Groups
Therapeutics

Keywords

  • Postural control
  • Predictable and unpredictable environments
  • Trajectory stability
  • Traumatic brain injury

ASJC Scopus subject areas

  • Rehabilitation
  • Clinical Neurology
  • Health Professions(all)

Cite this

The effect of predictable and unpredictable motor tasks on postural control after traumatic brain injury. / Zhang, Ling; Abreu, Beatriz C.; Gonzales, Vera; Huddleston, Neil; Ottenbacher, Kenneth.

In: NeuroRehabilitation, Vol. 17, No. 3, 2002, p. 225-230.

Research output: Contribution to journalArticle

Zhang, Ling ; Abreu, Beatriz C. ; Gonzales, Vera ; Huddleston, Neil ; Ottenbacher, Kenneth. / The effect of predictable and unpredictable motor tasks on postural control after traumatic brain injury. In: NeuroRehabilitation. 2002 ; Vol. 17, No. 3. pp. 225-230.
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