Linear and Non-Linear Measurements of Postural Control Recovery Following Concussion

Document Type

Presentation

Presentation Date

5-29-2015

Abstract or Description

Introduction: Impaired postural control is a cardinal symptom of concussion and the Balance Error Scoring System (BESS) suggests recovery within 3-5 days. However, instrumented measures of postural control have suggested persistent deficits.

Purpose: To evaluate differences in linear (95% area, mean velocity) and non-linear (approximate entropy) measurements in concussed individuals throughout the recovery process compared to healthy controls

Methods: 18 collegiate athletes with concussion (age: 19.0±1.4 years, height: 175.9±11.4 cm, mass: 82.5±23.8 kg) and 10 healthy individuals (age: 22.4±2.7 years, height: 175.7±11.9 cm, mass: 81.1±21.3 kg) were tested. Post-concussion participants were tested on three occasions 1) acutely (24-48 hours following injury), 2) RTP day (full practice/game), and 3) 30 days following injury. Participants completed three trials of a quiet stance (eyes open, firm surface) on their dominant leg for 20 seconds. Performance at each time point was compared to healthy values using a 2x3 ANOVA for each dependent variable.

Results: There was a significant main effect for group in both 95% area (p

Conclusion: Linear CoP measurements, especially 95% area, may be strong indicators of postural control deficits acutely post-concussion. However, at RTP non-linear measures may better at identifying lingering impairments. Lingering deficits up to 30 days following injury may become apparent when using these measurements.

Sponsorship/Conference/Institution

American College of Sports Medicine Annual Conference (ACSM)

Location

San Diego, CA

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