Cited by 53Traumatic Brain Injury ResearchOccupational Health and PerformanceAutomotive and Human Injury Biomechanics

Potential Health and Performance Effects of High-Level and Low-Level Blast: A Scoping Review of Two Decades of Research

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Belding, Jennifer N., Englert, Robyn M., Fitzmaurice, Shannon, Jackson, Jourdan R., Koenig, Hannah G., Hunter, Michael A., Thomsen, Cynthia J., da Silva, Uade Olaghere·2021·Frontiers in Neurology

Abstract

Although blast exposure has been recognized as a significant source of morbidity and mortality in military populations, our understanding of the effects of blast exposure, particularly low-level blast (LLB) exposure, on health outcomes remains limited. This scoping review provides a comprehensive, accessible review of the peer-reviewed literature that has been published on blast exposure over the past two decades, with specific emphasis on LLB. We conducted a comprehensive scoping review of the scientific literature published between January 2000 and 2019 pertaining to the effects of blast injury and/or exposure on human and animal health. A three-level review process with specific inclusion and exclusion criteria was used. A full-text review of all articles pertaining to LLB exposure was conducted and relevant study characteristics were extracted. The research team identified 3,215 blast-relevant articles, approximately half of which (55.4%) studied live humans, 16% studied animals, and the remainder were non-subjects research (e.g., literature reviews). Nearly all (99.49%) of the included studies were conducted by experts in medicine or epidemiology; approximately half of these articles were categorized into more than one medical specialty. Among the 51 articles identified as pertaining to LLB specifically, 45.1% were conducted on animals and 39.2% focused on human subjects. Animal studies of LLB predominately used shock tubes to induce various blast exposures in rats, assessed a variety of outcomes, and clearly demonstrated that LLB exposure is associated with brain injury. In contrast, the majority of LLB studies on humans were conducted among military and law enforcement personnel in training environments and had remarkable variability in the exposures and outcomes assessed. While findings suggest that there is the potential for LLB to harm human populations, findings are mixed and more research is needed. Although it is clear that more research is needed on this rapidly growing topic, this review highlights the detrimental effects of LLB on the health of both animals and humans. Future research would benefit from multidisciplinary collaboration, larger sample sizes, and standardization of terminology, exposures, and outcomes.

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  • If there is cumulative brain damage from repetitive, sub-concussive, low-level blast exposures, it was not apparent on the study's cognitive testing.

    “If there is cumulative brain damage from repetitive, sub-concussive, low-level blast exposures as evidence from other evaluation techniques suggests (Belding et al., 2021; Goldstein et al., 2012; Stone et al., 2020; Tate et al., 2013), it was not apparent on our cognitive testing.”

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Authors
Belding, J. N., Englert, R. M., Fitzmaurice, S., Jackson, J. R., Koenig, H. G., Hunter, M. A., Thomsen, C. J., & da Silva, U. O.
Affiliations
Naval Health Research Center (US)
Corresponding author
Belding, Jennifer N.
Venue
Frontiers in Neurology
Published
2021-03-10
Volume
12
Pages
628782-628782
ISSN
1664-2295 (ISSN-L)
OpenAlex
W3135267821
Cited by
53
References
2
Citations by year
2026: 13 · 2025: 9 · 2024: 13 · 2023: 7 · 2022: 8 · 2021: 3
FWCI
1.19
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Neurology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Bureau of Medicine and Surgery
Topics
  • Health Sciences › Medicine › Epidemiology › Traumatic Brain Injury Research
  • Health Sciences › Health Professions › Occupational Therapy › Occupational Health and Performance
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Automotive and Human Injury Biomechanics
Keywords
blast injury, military personnel, law enforcement officers, brain injury, training environment, performance effects

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