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Related Experiment Video

Updated: Apr 15, 2026

A Multi-Modal Approach to Assessing Recovery in Youth Athletes Following Concussion
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Persistent Postconcussive Symptoms Are Accompanied by Decreased Functional Brain Oxygenation.

Ingo Helmich1, Rajeet S Saluja1, Hedda Lausberg1

  • 1From the Dept. of Neurology, Psychosomatic Medicine and Psychiatry, Institute of Health Promotion and Clinical Movement Science, German Sport University Cologne, Cologne, Germany(IH, HL, AB); Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada (RSS, J-KC, AP); Institute of Physiology and Anatomy, German Sport University Cologne, Germany (MK); Institute of Cognitive and Team/Racket Sport Research, German Sport University Cologne, Germany (MK, PF); and Dept. of Psychology, McGill University Health Center, Montreal, Quebec, Canada (AP).

The Journal of Neuropsychiatry and Clinical Neurosciences
|March 25, 2015
PubMed
Summary

Mild traumatic brain injury (mTBI) can impair working memory. This study found decreased brain oxygenation in concussed individuals, correlating with worse memory performance and symptom severity.

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Area of Science:

  • Neuroscience
  • Medical Diagnostics

Background:

  • Mild traumatic brain injury (mTBI) diagnosis remains challenging.
  • Persistent postconcussive symptoms can significantly impact cognitive function.

Purpose of the Study:

  • To investigate brain oxygenation patterns during working memory tasks in individuals with persistent postconcussive symptoms.
  • To explore the relationship between brain oxygenation, working memory performance, and symptom severity after mTBI.

Main Methods:

  • Functional near-infrared spectroscopy (fNIRS) was used to measure prefrontal brain oxygenation.
  • Participants included individuals with severe and minor persistent postconcussive difficulties and a healthy control group.
  • Working memory tasks were administered to assess cognitive performance.

Main Results:

  • Concussed subjects with severe symptoms showed reduced working memory performance.
  • These cognitive deficits were associated with decreased brain oxygenation patterns in prefrontal regions.
  • A correlation was observed between diminished brain oxygenation, impaired working memory, and higher symptom severity scores.

Conclusions:

  • Decreased prefrontal brain oxygenation may be a biomarker for cognitive impairment in persistent postconcussive symptoms.
  • fNIRS can help elucidate the neurophysiological underpinnings of persistent postconcussive symptoms.
  • Findings suggest a link between brain oxygenation deficits and the severity of post-TBI cognitive dysfunction.