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Related Experiment Video

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Assessing Changes in Synaptic Plasticity Using an Awake Closed-Head Injury Model of Mild Traumatic Brain Injury
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Driving performance acutely after mTBI among young drivers.

Thomas Kerwin1, Benjamin McManus2, Cameron Wrabel1

  • 1Driving Simulation Laboratory, The Ohio State University, Columbus, OH 43212, USA.

Accident; Analysis and Prevention
|September 27, 2023
PubMed
Summary

Young drivers with mild traumatic brain injury (mTBI) showed altered driving patterns in simulations shortly after injury. Cognitive load slowed reaction times for all drivers, impacting driving safety assessments.

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Area of Science:

  • Neuroscience
  • Traffic Safety
  • Rehabilitation Medicine

Background:

  • Mild traumatic brain injury (mTBI) can impair cognitive functions essential for driving, such as executive function, learning, and memory.
  • The acute effects of mTBI on the driving performance of young drivers remain largely uncharacterized.
  • Understanding these effects is crucial for determining safe return-to-driving timelines.

Purpose of the Study:

  • To evaluate simulated driving performance in young drivers within 96 hours of mTBI compared to healthy controls.
  • To assess the impact of increased cognitive load on driving performance after acute mTBI.
  • To provide preliminary data for clinical decision-making regarding return-to-driving post-mTBI.

Main Methods:

  • Recruitment of young drivers (16-24 years) with physician-confirmed mTBI from two academic centers.
  • Use of a high-fidelity driving simulator to assess driving performance within 96 hours of injury.
  • Comparison of driving outcomes between 25 mTBI cases and 13 matched healthy controls across four simulated scenarios (with/without cognitive load, with/without critical events).
  • Statistical analysis using linear mixed models.

Main Results:

  • mTBI drivers exhibited a tendency to maintain greater following distances compared to healthy controls.
  • Increased cognitive load was associated with significantly slower reaction times in all participants, irrespective of TBI status.
  • Analysis focused on standard deviation of lateral position, following distance, and reaction time.

Conclusions:

  • This study represents the first assessment of simulated driving performance in young drivers during the acute phase following mTBI.
  • Findings suggest potential alterations in driving behavior and highlight the exacerbating effect of cognitive load on reaction time.
  • Results have significant clinical implications for guiding return-to-driving recommendations for young drivers post-mTBI, warranting further investigation.