Previous mild traumatic brain injury and postural-control dynamics

Jacob J. Sosnoff, Steven P. Broglio, Sunghoon Shin, Michael S. Ferrara

Research output: Contribution to journalArticle

Abstract

Context: Postural control and cognitive function are adversely affected by acute mild traumatic brain injury (mTBI). Whether postural-control deficits persist beyond the acute stage in individuals with a history of mTBI is unclear. Objective: To determine if postural-control deficits persist in individuals with a history of mTBI. Design: Retrospective cross-sectional study. Setting: University research laboratory. Patients or Other Participants: As part of an ongoing investigation examining cognitive and motor deficits associated with mTBI, 224 individuals participated in the study. Of these, 62 participants self-reported at least 1 previous physician-diagnosed mTBI. Intervention(s): Postural control was assessed using the NeuroCom Sensory Organization Test (SOT) postural-assessment battery. Main Outcome Measure(s): The SOT postural assessment yields 4 indices of postural control: a composite balance score, a visual ratio score, a somatosensory score, and a vestibular score. Postural dynamics were also examined by calculating approximate entropy of center-of-pressure excursions in the anteroposterior and mediolateral axis for each test condition. Results: Minimal differences in the SOT indices were noted among individuals with and without a history of previous mTBI (P > .05). In the group with a history of mTBI, anteroposterior postural irregularity decreased as postural difficulty increased. In contrast, the group without a history of mTBI displayed increased postural irregularity in the mediolateral direction. Conclusions: Individuals with a history of mTBI exhibited altered postural dynamics compared with individuals without a history of mTBI. These findings support the notion that changes in cerebral functioning that affect postural control may persist long after acute injury resolution.

Original languageEnglish (US)
Pages (from-to)85-91
Number of pages7
JournalJournal of Athletic Training
Volume46
Issue number1
DOIs
StatePublished - 2011

Keywords

  • Balance
  • Complexity analysis
  • Concussions
  • Long-term effects
  • Nonlinear dynamics

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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