Understanding Sports Concussions: Latest Advances in Diagnosis, Biomarkers, and Long-Term Effects

What is it about?

This article reviews the state of research on sports-related concussion (SRC), a form of mild traumatic brain injury, by synthesizing data from over 30 peer-reviewed studies published between 2000 and 2025. It evaluates advancements in clinical diagnosis, biomarker development, neuroimaging, and the long-term consequences of SRC. The article highlights the adoption of multimodal diagnostic tools like SCAT6 and the King-Devick test, which, while sensitive, have moderate specificity and cannot independently confirm SRC. Emerging biomarkers such as glial fibrillary acidic protein and neurofilament light chain are promising but remain investigational. Advanced neuroimaging techniques, including diffusion tensor imaging and tau PET, have shown microstructural changes following SRC, though their clinical application is limited to research. A meta-analysis of cohort studies suggests a significant increased risk of neurocognitive disorders in athletes with multiple SRCs, indicating a dose-response relationship. The review underscores the importance of developing objective diagnostic tools and conducting longitudinal studies to enhance care and inform policy.

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Why is it important?

This review examines the significant challenges and advancements in the diagnosis and management of sports-related concussion (SRC), a prevalent form of mild traumatic brain injury. Given the potential for persistent symptoms and long-term neurodegenerative risks associated with SRC, understanding the latest developments in clinical assessments, biomarker discovery, and neuroimaging is crucial for improving athlete safety and health outcomes. This synthesis of over 30 studies provides a comprehensive overview of current diagnostic protocols and their limitations, offering insights into future research directions aimed at mitigating the cumulative risks associated with repeated concussive events. Key Takeaways: 1. This review article summarizes current multimodal diagnostic protocols for sports-related concussion, highlighting tools such as SCAT6, SAC, BESS, and the King-Devick test. These tools demonstrate high sensitivity but only moderate specificity, indicating the need for further refinement to enhance diagnostic accuracy. 2. The article compiles recent developments in biomarker research, noting the potential of blood-based markers like glial fibrillary acidic protein and neurofilament light chain in detecting acute SRC. However, these biomarkers remain investigational and require further validation for routine clinical application. 3. This review article discusses advances in neuroimaging, particularly diffusion tensor imaging and tau PET scans, which have unveiled microstructural changes associated with SRC. While these techniques offer valuable insights into brain alterations post-injury, their application is currently limited to research settings, necessitating ongoing exploration for broader clinical use.