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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.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 1 Oct 2010-30 Sep 2011 |
| Pages: |
16 |
| Report Date: |
11 Jan 2012 |
| Contract Number: |
W911NF-10-1-0425 |
| Report Number: |
A918755 |
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Keywords relating to this report:
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