Nonlinear Dynamics Used to Classify Effects of Mild Traumatic Brain Injury

Abstract

Postural stability characteristics of individuals who had experienced mild traumatic brain injury were analyzed for non-linear dynamics. These participants had experienced concussions during sports activities. Their sways were measured while standing on a force-transducing platform. The data analyzed were pre-existing rather than collected de novo. Postural stability was measured over days of recovery using long (120 sec) time samples, with high temporal and spatial resolution of center of pressure (COP) trajectories. The time series of COP were analyzed for the commonly used linear measure of area, and for nonlinear measures of Shannon and Renyi entropy. Both Shannon and Renyi entropy measures were found to be useful to index recovery of postural stability post-concussion, findings which have recently been published.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 11, 2012
Accession Number
ADA557819

Entities

People

  • Keith D. White

Organizations

  • University of Florida

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Amnesia
  • Brain Injuries
  • Cognitive Impairment
  • Contracts
  • Data Analysis
  • Diseases And Disorders
  • Engineering
  • Law
  • Medical Personnel
  • Military Research
  • Neurodegeneration
  • Nonlinear Dynamics
  • Probability
  • Random Walk
  • Standards
  • Students
  • United States

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Neurotrauma and Rehabilitation Medicine.
  • Psychological Intervention/Treatment for Stress, Anxiety, PTSD, and Related Emotional and Cognitive Health Symptoms.