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Quantification of Mild Traumatic Brain Injury via Cortical Metrics: Analytical Methods.

Oleg V Favorov1, Eric Francisco2, Jameson Holden2

  • 1Department of Biomedical Engineering, University of North Carolina at Chapel Hill, CB No. 7575, Chapel Hill, NC.

Military Medicine
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Summary

New tactile sensory tests, called cortical metrics, can effectively diagnose mild traumatic brain injuries (sports-related concussions) and monitor recovery. These metrics offer a quantitative indicator of central nervous system health.

Keywords:
concussion assessmentscortical metricsmTBItactile

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Sports Medicine

Background:

  • Mild traumatic brain injuries (MTBIs), such as concussions, present diagnostic challenges with conventional methods.
  • Assessing the functional state of cerebral cortical networks is crucial for understanding MTBI impact.

Purpose of the Study:

  • To evaluate the efficacy of tactile-based sensory percepts (cortical metrics) in diagnosing sports-related concussions.
  • To determine if cortical metrics can serve as a quantitative indicator of central nervous system health and recovery.

Main Methods:

  • Collected cortical metrics from 52 college students before and after sports-related concussions using vibrotactile stimuli on fingertips.
  • Assessed performance in reaction time, amplitude discrimination, temporal order judgment, and duration discrimination.
  • Analyzed data using statistical methods, receiver operating characteristic (ROC) curves, and discriminant analysis.

Main Results:

  • Individual cortical metrics showed varied discriminative ability between control and concussed subjects.
  • Combined cortical metrics achieved high diagnostic accuracy: 93.0% sensitivity, 92.3% specificity, 93.0% positive predictive value, and 92.3% negative predictive value.
  • The cortical metrics vector demonstrated potential for tracking individual concussion recovery.

Conclusions:

  • Cortical metrics provide a sensitive and specific method for diagnosing mild traumatic brain injuries.
  • This approach offers a quantitative, non-invasive tool for assessing central nervous system health status and recovery post-concussion.