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On line 86, column 160 <!DOCTYPE html><html class="no-js" lang="en"> <head> <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Study Identifies Signs of Repeated Blast-Related Brain Injury in Active-Duty United States Special Operations Forces</title> <meta content="IE=edge" http-equiv="X-UA-Compatible"> <meta content="on" http-equiv="cleartype"> <!--grid-layout--> <!--ls:begin[stylesheet]--> <style type="text/css"> .iw_container { max-width:800px !important; margin-left: auto; margin-right: auto; } .iw_stretch { max-width: 100% !important; } </style> <link href="//app-ab21.marketo.com" rel="preconnect"> <link href="//cloud-api.highcharts.com" rel="preconnect"> <link href="//cloud.highcharts.com" rel="preconnect"> <link href="//fast.fonts.net" rel="preconnect"> <script> if("true"===sessionStorage.fontsLoaded)document.documentElement.classList.add("fonts-loaded") else{var script=document.createElement("script") 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On line 86, column 160 <!DOCTYPE html><html class="no-js" lang="en"> <head> <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Study Identifies Signs of Repeated Blast-Related Brain Injury in Active-Duty United States Special Operations Forces</title> <meta content="IE=edge" http-equiv="X-UA-Compatible"> <meta content="on" http-equiv="cleartype"> <!--grid-layout--> <!--ls:begin[stylesheet]--> <style type="text/css"> .iw_container { max-width:800px !important; margin-left: auto; margin-right: auto; } .iw_stretch { max-width: 100% !important; } </style> <link href="//app-ab21.marketo.com" rel="preconnect"> <link href="//cloud-api.highcharts.com" rel="preconnect"> <link href="//cloud.highcharts.com" rel="preconnect"> <link href="//fast.fonts.net" rel="preconnect"> <script> if("true"===sessionStorage.fontsLoaded)document.documentElement.classList.add("fonts-loaded") else{var script=document.createElement("script") 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On line 898, column 116 ss="skip"> <li> <a href="#cookieNoticeClose">skip to Cookie Notice</a> </li> <li> <a href="#main-nav">skip to Main Navigation</a> </li> <li> <a href="#main-content">skip to Main Content</a> </li> <li> <a href="#global-footer">skip to Footer</a> </li> </ul><header data-module="Header" class="global-header" id="global-header"> <div class="global-header__top" id="global-header-utility-nav"> <nav aria-label="Utility" class="top-nav container"> <ul data-module="NavMenu" class="top-nav__items" data-opts="{&quot;triggerSelector&quot;:&quot;.top-nav__link&quot;,&quot;menuSelector&quot;:&quot;.top-nav__dropdown-menu&quot;}"> <li class="top-nav__item"> <a class="top-nav__link" href="/doctors" target="">Find a Doctor</a> </li> <li class="top-nav__item"> <a class="top-nav__link" href="/locations" target="">Find a Location</a> </li> <li class="top-nav__item"> <a class="top-nav__link" href="/appointments-and-referrals" target="">Appointments &amp; Referrals</a> </li> <li class="top-nav__item"> <a class="top-nav__link" href="/services/patient-gateway" target="">Patient Gateway</a> </li> <li class="top-nav__item"> <a class="top-nav__link" href="https://giving.massgeneral.org/donate" target="">Give Now</a> </li> <li class="top-nav__item"> <button class="top-nav__link" role="button" aria-haspopup="true" aria-expanded="false" aria-controls="topnavlanguage">Language<span class="icon"><i class="fas fa-angle-down"></i></span></button> <div class="top-nav__dropdown-menu" id="topNavAppointmentsMenu"> <ul class="top-nav__dropdown-menu-inner" id="topnavlanguage"> <li class="top-nav__dropdown-item"> <a class="arrow-link top-nav__dropdown-link" href="/international" target="" lang="">English<span class="icon"><i class="fas fa-angle-right"></i></span></a> </li> <li class="top-nav__dropdown-item"> <a class="arrow-link top-nav__dropdown-link" href="/es/internacional" target="" lang="es">Espa&ntilde;ol<span class="icon"><i class="fas fa-angle-right"></i></span></a> </li> <li class="top-nav__dropdown-item"> <a class="arrow-link top-nav__dropdown-link" href="/cn/international/" target="" lang="cn">中文<span class="icon"><i class="fas fa-angle-right"></i></span></a> </li> <li class="top-nav__dropdown-item"> <a class="arrow-link top-nav__dropdown-link" href="/ar/international" target="" lang="ar">العربية<span class="icon"><i class="fas fa-angle-right"></i></span></a> </li> </ul> </div> </li> </ul> </nav> </div> <div id="global-header-primary-nav" class="global-header__main"> <div style="" class="dropdown-background"> <div></div> </div> <div class="container"> <div class="row row--align-items-center"> <div class="col-8 col-md-5 col-lg-3 col-xl-4"> <div class="global-header__logo"> <a aria-label="Home" title="Home" href="/"><img alt="Massachusetts General Hospital logo" src="/assets/MGH/images/logos/mgh-logo-rgb.svg"></a> </div> </div> <div class="col-4 col-md-7 col-lg-9 col-xl-8"> <div class="global-header__desktop-nav"> <nav aria-label="Primary" data-module="MainNav" class="main-nav" id="main-nav"> <ul data-module="NavMenu" class="main-nav__items" data-opts="{&quot;triggerSelector&quot;:&quot;.main-nav__link&quot;,&quot;menuSelector&quot;:&quot;.main-nav__mega-menu&quot;,&quot;parentSelector&quot;:&quot;#global-header-primary-nav&quot;}"> <li class="main-nav__item"> <button aria-haspopup="true" aria-expanded="false" class="main-nav__link" type="button" aria-controls="mainNavthemassgeneralbrdifference">The Mass General <br/> Difference</button> <div class="main-nav__mega-menu" id="mainNavthemassgeneralbrdifference"> <div class="main-nav__mega-menu-inner"> <div class="container"> <div class="row"> <div class="col-lg-3"> <div class="main-nav-col main-nav-col--description"> <div class="main-nav-col__inner"> <div class="main-nav-col__content"> <div class="main-nav-col__description"> <h2> <a href="/about" class="arrow-link">The Mass General Difference</a> </h2> <p>We have remained at the forefront of medicine by fostering a culture of collaboration, pushing the boundaries of medical research, educating the brightest medical minds and maintaining an unwavering commitment to the diverse communities we serve.</p> </div> </div> </div> </div> </div> <div class="col-lg-3"> <div class="main-nav-col main-nav-col--links"> <div class="main-nav-col__inner"> <div class="main-nav-col__content"> <ul class="main-nav-col__link-list"> <li> <a class="arrow-link main-nav-col__link main-nav-col__link--title" href="/about" target="">About Us<span class="icon"><i class="fas fa-angle-right"></i></span></a> </li> <li> <a class="arrow-link main-nav-col__link main-nav-col__link--title" href="/news" target="">News &amp; 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aria-hidden=""></i></button> </li> </ul> </div> </div> </div> </div> </div> </div> <div class="hero-content has-eyelash-separators has-description-separators"> <div class="hero-content__inner"> <div class="hero-content__graphic"></div> <p class="hero-content__eyelash"> <span class="category">Press Release</span><span class="date">Apr | 22 | 2024</span> </p> <h1 class="hero-content__title">Study Identifies Signs of Repeated Blast-Related Brain Injury in Active-Duty United States Special Operations Forces </h1> <div class="hero-content__title-separator"></div> <div class="hero-content__description"> <span class="author">Brandon Chase </span><span class="email"><a href="mailto:[email protected]">[email protected]</a></span> </div> </div> </div> </div> <div class="hero-area__image"> <figure data-module="HeroImage" class="hero-image "> <div class="hero-image__image hero-image__image--desktop"> <img title="" alt="" data-lazyload="true" 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88h-42L364.4 421.8z"/> </svg></a> </li> <li> <a data-site="LinkedIn" class="sharing__icon" href="#"><span class="sr-only">See us on LinkedIn</span><i class="fab fa-linkedin-in" aria-hidden=""></i></a> </li> <li> <a onclick="print();" data-site="Print" class="sharing__icon" href="#"><span class="sr-only">Print this page</span><i class="fas fa-print" aria-hidden=""></i></a> </li> </ul> </div> </div> </div> </div> </div> </div> <div class="container"> <div class="main-content main-content__with-sidebar"> <div class="sidebar sidebar__top"></div> <div class="content"> <div class="highlighted-info-block"> <h2>Key Takeaways</h2> <ul> <li>Repeated exposure to explosive blasts has the potential to cause brain injuries, but there is currently no diagnostic test for these injuries</li> <li>In a study of 30 active-duty United States SOF personnel, researchers found that increased blast exposure was associated with structural, functional, and neuroimmune changes to the brain and a decline in health-related quality of life</li> <li>The researchers are now designing a larger study to develop a diagnostic test for repeated blast brain injury</li> </ul> </div> <div class="wysiwyg"><p><strong>&nbsp;BOSTON&ndash;</strong>United States (US) Special Operations Forces (SOF) personnel are frequently exposed to explosive blasts during training and combat. However, the effects of repeated blast exposure on the brain health of SOF personnel are unclear, and there is currently no diagnostic test that can detect brain injury caused by the cumulative effects of subconcussive blast exposure.&nbsp;</p> <p>As a result, SOF personnel may experience cognitive, psychological and physical symptoms for which the cause is never identified, and they may return to training or combat when their brains are vulnerable.</p> <p><a class="none" href="https://www.socom.mil" target="_blank" rel="noopener noreferrer">US Special Operations Command (USSOCOM)</a> recognizes that the health and well-being of its elite SOF members is a critical element to develop and employ the world's finest warfighters. Because brain health is a key element to fielding a healthy force, USSOCOM willingly participated in this pilot study to help both the US Military and the medical community understand and identify signs related to repeated blast effects. Collectively, USSOCOM hopes that the impact of this study will benefit all US Military members with repeated blast exposure in the future.</p> <p>To understand the effects of repeated blast exposure on SOF brain health and inform the development of a diagnostic test for repeated blast brain injury, a team at <a class="none" href="https://www.massgeneral.org" target="_blank" rel="noopener noreferrer">Massachusetts General Hospital</a>, a founding member of the Mass General Brigham healthcare system, conducted the ReBlast study, a comprehensive, multimodal investigation of 30 active-duty US SOF. The <a class="none" title="University of South Florida, Institute of Applied Engineering" href="https://www.usf.edu/engineering/iae/" target="_blank" rel="noopener noreferrer">University of South Florida, Institute of Applied Engineering</a> coordinated and managed the study, which was supported by USSOCOM.</p> <p>In a publication titled &ldquo;Impact of Repeated Blast Exposure on Active-Duty United States Special Operations Forces,&rdquo; published today in <a class="none" title="Proceedings of the National Academy of Sciences of the U.S.A.," href="https://www.pnas.org/doi/10.1073/pnas.2313568121" target="_blank" rel="noopener noreferrer">Proceedings of the National Academy of Sciences of the U.S.A.,</a>&nbsp;the team reports that higher blast exposure was associated with structural, functional, and neuroimmune brain alterations and lower health-related quality of life.</p> <p>The magnetic resonance imaging (MRI) and positron emission tomography (PET) findings converged at a region of the frontal lobe called the rostral anterior cingulate cortex (rACC), which is known to be a widely connected brain network hub that modulates cognition and emotion.</p> <p>Three lines of evidence &ndash; structural MRI, functional MRI, and translocator protein PET &ndash; showed an association between cumulative blast exposure and changes in the rACC. Among all the findings, the association between cumulative blast exposure and structural MRI changes in the rACC was the most significant. These results suggest that the rACC may be particularly sensitive to blast waves that penetrate the openings in the skull behind the eyes.</p> <p>Higher cumulative blast exposure was also associated with decreased health-related quality of life on self-reported questionnaires. However, blast exposure was not associated with changes in cognitive performance, post-traumatic stress disorder symptoms, or blood proteomics. No signs of blast-related brain injury were identified by conventional MRI scans.</p> <h4>Characteristics of Study Participants</h4> <p>SOF study participants represented all branches of the military and included both enlisted personnel and officers. On average, participants were 37 years old and had 17 years of military service.&nbsp; All participants had extensive combat exposure and reported levels of cumulative blast exposure at which individuals are likely to experience cognitive, physical or psychological symptoms. They also reported high levels of blunt impacts to the head, with half the cohort having more blows to the head than they could recall.&nbsp;</p> <p>These blunt head impacts, as well as age and amount of combat exposure, were accounted for in statistical analyses that tested for associations between blast exposure and a broad spectrum of cognitive, physical symptom, psychological, neuroimaging and blood-based biomarkers.</p> <p><img class="align-center" src="/assets/MGH/images/News/press-releases/Neuroimaging.png" /></p> <p><strong><em>Blast Exposure Associations with Neuroimaging Biomarkers. </em></strong><em>Cumulative blast exposure was associated with changes in cortical thickness (left), functional connectivity (middle) and neuroimmune markers (right).</em></p> <h4>Limitations and Next Steps</h4> <p>&ldquo;A key limitation of the study is that we were unable to measure the many additional exposures that SOF personnel experience during training and combat, such as inhalation of heavy metals, lack of oxygen during high-altitude jumping or deep-sea diving, and acceleration g-forces when flying in aircraft or traveling over waves at high speeds,&rdquo; explains Brian L. Edlow, MD, principal investigator of the study. &ldquo;As a result, the associations we observed between cumulative blast exposure and brain network disruption do not prove causation.&rdquo;</p> <p>Dr. Edlow is co-director of <a class="none" href="https://www.massgeneral.org/neuroscience" target="_blank" rel="noopener noreferrer">Mass General Neuroscience</a>, associate director of the <a class="none" href="https://www.cntr.mgh.harvard.edu" target="_blank" rel="noopener noreferrer">Center for Neurotechnology and Neurorecovery (CNTR) </a>at Mass General, an associate professor of Neurology at Harvard Medical School and a <a class="none" title="Chen Institute MGH Research Scholar 2023-2028" href="https://www.massgeneral.org/research/support/mgh-research-scholars/scholar-profiles/2023-2028/brian-edlow">Chen Institute MGH Research Scholar 2023-2028</a>.</p> <p>&ldquo;Future studies with more comprehensive and objective exposure measurements, larger sample sizes, and a longitudinal design are needed to definitively link blast exposure to the imaging biomarkers that we observed,&rdquo; adds Natalie Gilmore, PhD, first author of the study and a research fellow in the CNTR.</p> <p>The researchers are now designing such a longitudinal study with the goal of developing a reliable diagnostic test for repeated blast brain injury. Although no specific blood-based biomarkers for brain injury were detected during the study, the researchers did find higher than expected levels of tau in the blood of study participants, a finding that could help in developing a portable diagnostic test.</p> <p>&ldquo;The availability of a reliable diagnostic test could improve Operators&rsquo; quality of life by ensuring that they receive timely, targeted medical care for symptoms related to repeated blast brain injury,&rdquo; explains Yelena G. Bodien, PhD, co-senior author of the paper and an investigator in the CNTR. &ldquo;A diagnostic test could also be used to inform decisions by Commanders about the combat readiness of individual Operators.&rdquo;</p> <p>&ldquo;Ultimately, the goal of this research is to enhance the combat readiness, career longevity, and quality of life of the United States&rsquo; most elite forces,&rdquo; Edlow says.</p> <p>&ldquo;These are American heroes who answered the call to serve after the terrorist attacks of September 11, 2001 and fought the most dangerous missions of the Global War on Terror for two decades. They deserve the best medical care, and while more research is needed, our results suggest that a diagnostic test for repeated blast brain injury is within reach.&rdquo;</p> <h4>Authorship:</h4> <p>In addition to Edlow, Bodien, and Gilmore, Tseng and Maffei were co-first authors.</p> <h4>Disclosures:</h4> <p>Disclosure forms provided by the authors are available with the full text of this article.</p> <h4>Funding:</h4> <p>This study was funded by the U.S. Department of Defense (USSOCOM Contract No. H9240520D0001). Support was also provided by the <a class="none" href="https://www.navysealfoundation.org" target="_blank" rel="noopener noreferrer">Navy SEAL Foundation.</a></p> <h4>Paper cited:</h4> <p>Gilmore N*, Tseng CJ*, Maffei C*, et al.&nbsp; Impact of repeated blast exposure on active-duty United States Special Operations Forces. <em>Proceedings of the National Academy of Sciences of the U.S.A</em>. 2024. DOI: 10.1073/pnas.2313568121 (*co-first authors).</p> <h4>About Massachusetts General Hospital</h4> <p>Massachusetts General Hospital, founded in 1811, is the original and largest teaching hospital of Harvard Medical School. The&nbsp;<a href="https://www.massgeneral.org/research/about/overview-of-the-research-institute">Mass General Research Institute&nbsp;</a>conducts the largest hospital-based research program in the nation, with annual research operations of more than $1 billion and comprises more than 9,500 researchers working across more than 30 institutes, centers and departments. MGH is a founding member of the Mass General Brigham healthcare system.</p> <h4>About the University of South Florida, Institute of Applied Engineering</h4> <p>The University of South Florida's Institute of Applied Engineering (IAE) represents a beacon of innovation and excellence. Skillfully blending academic prowess with practical application, the IAE addresses some of the nation's most critical challenges. Since its inception, the IAE has emerged as a vital partner to the Department of Defense, NASA, and other federal agencies, managing multimillion-dollar contracts to enhance the capabilities of our nation's defense mechanisms. With expertise spanning Integrated Systems, Software Systems, Intelligent Systems, and beyond, the Institute delivers comprehensive solutions through a synergistic approach that combines the talents of USF's esteemed faculty, a nationwide consortium of over 43 universities, and agile small businesses. The IAE's model of integrating research, development, rapid prototyping, and education is optimized to address the nation&rsquo;s most complex issues.</p> <h4>About US Special Operations Command</h4> <p>USSOCOM develops, and employs, the world's finest SOF to conduct global special operations and activities as part of the Joint Force, in concert with the U.S. Government Interagency, Allies, and Partners, to support persistent, networked, and distributed combatant command operations and campaigns against state and non-state actors, all to protect and advance U.S. policies and objectives.</p></div> </div> <div class="sidebar sidebar__bottom"> <div class="featured-profiles featured-profiles--sidebar"> <ul class="featured-profiles__container"> <li> <div class="profile-block profile-block--sidebar "> <div class="profile-block__image"> <div class="profile-block__image-inner"> <img onerror="src = '/assets/MGH/images/FAD-Profile-Placeholder-120x120.jpg'" alt="" data-lazyload="true" class="lazyload absolute-full" data-src="https://px.massgeneral.connecthealthcare.com/Custom/Photos/HiRes/3093.jpg"></div> </div> <div class="profile-block__body"> <p class="profile-block__name"> <a href="/doctors/19536/brian-edlow">Brian Edlow, MD</a> </p> <ul class="profile-block__text"> <li>Co-Director, Mass General Neuroscience</li> <li>Director, Laboratory for NeuroImaging of Coma and Consciousness (NICC)</li> <li>Associate Director, Center for Neurotechnology and Neurorecovery (CNTR)</li> </ul> </div> </div> </li> </ul> </div> <div class="tags"> <h2>Type</h2> <ul> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;ArticleType[]=Press-Release">Press Release</a> </li> </ul> </div> <div class="tags"> <h2>Centers and Departments</h2> <ul> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Research-Institute">Research Institute</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Martinos-Center-For-Biomedical-Imaging">Martinos Center for Biomedical Imaging</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Neurology">Neurology</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Neuroscience">Neuroscience</a> </li> </ul> </div> <div class="tags"> <h2>Topics</h2> <ul> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;Topic[]=Brain-Spine-Nervous-System">Brain, Spine &amp; Nervous System</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;Topic[]=Mgh-Research-Scholar">MGH Research Scholar</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;Topic[]=Research">Research</a> </li> </ul> </div> <div class="spotlight-card spotlight-card--basic spotlight-card--proof-point"> <div class="spotlight-card__inner"> <div class="spotlight-card__content"> <div class="spotlight-card__body"> <h3 class="spotlight-card__heading">Check out the Mass General Research Institute blog</h3> <p class="spotlight-card__description">Bench Press highlights the groundbreaking research and boundary-pushing scientists working to improve human health and fight disease.</p> </div> <div class="spotlight-card__footer"> <div class="spotlight-card__link"> <a xmlns:xlink="http://www.w3.org/1999/xlink" class="arrow-link" aria-label="Visit the Mass General Research Institute Blog" href="https://bit.ly/3cK45oz" target="_blank">Check |
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88h-42L364.4 421.8z"/> </svg></a> </li> <li> <a data-site="LinkedIn" class="sharing__icon" href="#"><span class="sr-only">See us on LinkedIn</span><i class="fab fa-linkedin-in" aria-hidden=""></i></a> </li> <li> <a onclick="print();" data-site="Print" class="sharing__icon" href="#"><span class="sr-only">Print this page</span><i class="fas fa-print" aria-hidden=""></i></a> </li> </ul> </div> </div> </div> </div> </div> </div> <div class="container"> <div class="main-content main-content__with-sidebar"> <div class="sidebar sidebar__top"></div> <div class="content"> <div class="highlighted-info-block"> <h2>Key Takeaways</h2> <ul> <li>Repeated exposure to explosive blasts has the potential to cause brain injuries, but there is currently no diagnostic test for these injuries</li> <li>In a study of 30 active-duty United States SOF personnel, researchers found that increased blast exposure was associated with structural, functional, and neuroimmune changes to the brain and a decline in health-related quality of life</li> <li>The researchers are now designing a larger study to develop a diagnostic test for repeated blast brain injury</li> </ul> </div> <div class="wysiwyg"><p><strong>&nbsp;BOSTON&ndash;</strong>United States (US) Special Operations Forces (SOF) personnel are frequently exposed to explosive blasts during training and combat. However, the effects of repeated blast exposure on the brain health of SOF personnel are unclear, and there is currently no diagnostic test that can detect brain injury caused by the cumulative effects of subconcussive blast exposure.&nbsp;</p> <p>As a result, SOF personnel may experience cognitive, psychological and physical symptoms for which the cause is never identified, and they may return to training or combat when their brains are vulnerable.</p> <p><a class="none" href="https://www.socom.mil" target="_blank" rel="noopener noreferrer">US Special Operations Command (USSOCOM)</a> recognizes that the health and well-being of its elite SOF members is a critical element to develop and employ the world's finest warfighters. Because brain health is a key element to fielding a healthy force, USSOCOM willingly participated in this pilot study to help both the US Military and the medical community understand and identify signs related to repeated blast effects. Collectively, USSOCOM hopes that the impact of this study will benefit all US Military members with repeated blast exposure in the future.</p> <p>To understand the effects of repeated blast exposure on SOF brain health and inform the development of a diagnostic test for repeated blast brain injury, a team at <a class="none" href="https://www.massgeneral.org" target="_blank" rel="noopener noreferrer">Massachusetts General Hospital</a>, a founding member of the Mass General Brigham healthcare system, conducted the ReBlast study, a comprehensive, multimodal investigation of 30 active-duty US SOF. The <a class="none" title="University of South Florida, Institute of Applied Engineering" href="https://www.usf.edu/engineering/iae/" target="_blank" rel="noopener noreferrer">University of South Florida, Institute of Applied Engineering</a> coordinated and managed the study, which was supported by USSOCOM.</p> <p>In a publication titled &ldquo;Impact of Repeated Blast Exposure on Active-Duty United States Special Operations Forces,&rdquo; published today in <a class="none" title="Proceedings of the National Academy of Sciences of the U.S.A.," href="https://www.pnas.org/doi/10.1073/pnas.2313568121" target="_blank" rel="noopener noreferrer">Proceedings of the National Academy of Sciences of the U.S.A.,</a>&nbsp;the team reports that higher blast exposure was associated with structural, functional, and neuroimmune brain alterations and lower health-related quality of life.</p> <p>The magnetic resonance imaging (MRI) and positron emission tomography (PET) findings converged at a region of the frontal lobe called the rostral anterior cingulate cortex (rACC), which is known to be a widely connected brain network hub that modulates cognition and emotion.</p> <p>Three lines of evidence &ndash; structural MRI, functional MRI, and translocator protein PET &ndash; showed an association between cumulative blast exposure and changes in the rACC. Among all the findings, the association between cumulative blast exposure and structural MRI changes in the rACC was the most significant. These results suggest that the rACC may be particularly sensitive to blast waves that penetrate the openings in the skull behind the eyes.</p> <p>Higher cumulative blast exposure was also associated with decreased health-related quality of life on self-reported questionnaires. However, blast exposure was not associated with changes in cognitive performance, post-traumatic stress disorder symptoms, or blood proteomics. No signs of blast-related brain injury were identified by conventional MRI scans.</p> <h4>Characteristics of Study Participants</h4> <p>SOF study participants represented all branches of the military and included both enlisted personnel and officers. On average, participants were 37 years old and had 17 years of military service.&nbsp; All participants had extensive combat exposure and reported levels of cumulative blast exposure at which individuals are likely to experience cognitive, physical or psychological symptoms. They also reported high levels of blunt impacts to the head, with half the cohort having more blows to the head than they could recall.&nbsp;</p> <p>These blunt head impacts, as well as age and amount of combat exposure, were accounted for in statistical analyses that tested for associations between blast exposure and a broad spectrum of cognitive, physical symptom, psychological, neuroimaging and blood-based biomarkers.</p> <p><img class="align-center" src="/assets/MGH/images/News/press-releases/Neuroimaging.png" /></p> <p><strong><em>Blast Exposure Associations with Neuroimaging Biomarkers. </em></strong><em>Cumulative blast exposure was associated with changes in cortical thickness (left), functional connectivity (middle) and neuroimmune markers (right).</em></p> <h4>Limitations and Next Steps</h4> <p>&ldquo;A key limitation of the study is that we were unable to measure the many additional exposures that SOF personnel experience during training and combat, such as inhalation of heavy metals, lack of oxygen during high-altitude jumping or deep-sea diving, and acceleration g-forces when flying in aircraft or traveling over waves at high speeds,&rdquo; explains Brian L. Edlow, MD, principal investigator of the study. &ldquo;As a result, the associations we observed between cumulative blast exposure and brain network disruption do not prove causation.&rdquo;</p> <p>Dr. Edlow is co-director of <a class="none" href="https://www.massgeneral.org/neuroscience" target="_blank" rel="noopener noreferrer">Mass General Neuroscience</a>, associate director of the <a class="none" href="https://www.cntr.mgh.harvard.edu" target="_blank" rel="noopener noreferrer">Center for Neurotechnology and Neurorecovery (CNTR) </a>at Mass General, an associate professor of Neurology at Harvard Medical School and a <a class="none" title="Chen Institute MGH Research Scholar 2023-2028" href="https://www.massgeneral.org/research/support/mgh-research-scholars/scholar-profiles/2023-2028/brian-edlow">Chen Institute MGH Research Scholar 2023-2028</a>.</p> <p>&ldquo;Future studies with more comprehensive and objective exposure measurements, larger sample sizes, and a longitudinal design are needed to definitively link blast exposure to the imaging biomarkers that we observed,&rdquo; adds Natalie Gilmore, PhD, first author of the study and a research fellow in the CNTR.</p> <p>The researchers are now designing such a longitudinal study with the goal of developing a reliable diagnostic test for repeated blast brain injury. Although no specific blood-based biomarkers for brain injury were detected during the study, the researchers did find higher than expected levels of tau in the blood of study participants, a finding that could help in developing a portable diagnostic test.</p> <p>&ldquo;The availability of a reliable diagnostic test could improve Operators&rsquo; quality of life by ensuring that they receive timely, targeted medical care for symptoms related to repeated blast brain injury,&rdquo; explains Yelena G. Bodien, PhD, co-senior author of the paper and an investigator in the CNTR. &ldquo;A diagnostic test could also be used to inform decisions by Commanders about the combat readiness of individual Operators.&rdquo;</p> <p>&ldquo;Ultimately, the goal of this research is to enhance the combat readiness, career longevity, and quality of life of the United States&rsquo; most elite forces,&rdquo; Edlow says.</p> <p>&ldquo;These are American heroes who answered the call to serve after the terrorist attacks of September 11, 2001 and fought the most dangerous missions of the Global War on Terror for two decades. They deserve the best medical care, and while more research is needed, our results suggest that a diagnostic test for repeated blast brain injury is within reach.&rdquo;</p> <h4>Authorship:</h4> <p>In addition to Edlow, Bodien, and Gilmore, Tseng and Maffei were co-first authors.</p> <h4>Disclosures:</h4> <p>Disclosure forms provided by the authors are available with the full text of this article.</p> <h4>Funding:</h4> <p>This study was funded by the U.S. Department of Defense (USSOCOM Contract No. H9240520D0001). Support was also provided by the <a class="none" href="https://www.navysealfoundation.org" target="_blank" rel="noopener noreferrer">Navy SEAL Foundation.</a></p> <h4>Paper cited:</h4> <p>Gilmore N*, Tseng CJ*, Maffei C*, et al.&nbsp; Impact of repeated blast exposure on active-duty United States Special Operations Forces. <em>Proceedings of the National Academy of Sciences of the U.S.A</em>. 2024. DOI: 10.1073/pnas.2313568121 (*co-first authors).</p> <h4>About Massachusetts General Hospital</h4> <p>Massachusetts General Hospital, founded in 1811, is the original and largest teaching hospital of Harvard Medical School. The&nbsp;<a href="https://www.massgeneral.org/research/about/overview-of-the-research-institute">Mass General Research Institute&nbsp;</a>conducts the largest hospital-based research program in the nation, with annual research operations of more than $1 billion and comprises more than 9,500 researchers working across more than 30 institutes, centers and departments. MGH is a founding member of the Mass General Brigham healthcare system.</p> <h4>About the University of South Florida, Institute of Applied Engineering</h4> <p>The University of South Florida's Institute of Applied Engineering (IAE) represents a beacon of innovation and excellence. Skillfully blending academic prowess with practical application, the IAE addresses some of the nation's most critical challenges. Since its inception, the IAE has emerged as a vital partner to the Department of Defense, NASA, and other federal agencies, managing multimillion-dollar contracts to enhance the capabilities of our nation's defense mechanisms. With expertise spanning Integrated Systems, Software Systems, Intelligent Systems, and beyond, the Institute delivers comprehensive solutions through a synergistic approach that combines the talents of USF's esteemed faculty, a nationwide consortium of over 43 universities, and agile small businesses. The IAE's model of integrating research, development, rapid prototyping, and education is optimized to address the nation&rsquo;s most complex issues.</p> <h4>About US Special Operations Command</h4> <p>USSOCOM develops, and employs, the world's finest SOF to conduct global special operations and activities as part of the Joint Force, in concert with the U.S. Government Interagency, Allies, and Partners, to support persistent, networked, and distributed combatant command operations and campaigns against state and non-state actors, all to protect and advance U.S. policies and objectives.</p></div> </div> <div class="sidebar sidebar__bottom"> <div class="featured-profiles featured-profiles--sidebar"> <ul class="featured-profiles__container"> <li> <div class="profile-block profile-block--sidebar "> <div class="profile-block__image"> <div class="profile-block__image-inner"> <img onerror="src = '/assets/MGH/images/FAD-Profile-Placeholder-120x120.jpg'" alt="" data-lazyload="true" class="lazyload absolute-full" data-src="https://px.massgeneral.connecthealthcare.com/Custom/Photos/HiRes/3093.jpg"></div> </div> <div class="profile-block__body"> <p class="profile-block__name"> <a href="/doctors/19536/brian-edlow">Brian Edlow, MD</a> </p> <ul class="profile-block__text"> <li>Co-Director, Mass General Neuroscience</li> <li>Director, Laboratory for NeuroImaging of Coma and Consciousness (NICC)</li> <li>Associate Director, Center for Neurotechnology and Neurorecovery (CNTR)</li> </ul> </div> </div> </li> </ul> </div> <div class="tags"> <h2>Type</h2> <ul> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;ArticleType[]=Press-Release">Press Release</a> </li> </ul> </div> <div class="tags"> <h2>Centers and Departments</h2> <ul> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Research-Institute">Research Institute</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Martinos-Center-For-Biomedical-Imaging">Martinos Center for Biomedical Imaging</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Neurology">Neurology</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;CentersAndDepartments[]=Neuroscience">Neuroscience</a> </li> </ul> </div> <div class="tags"> <h2>Topics</h2> <ul> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;Topic[]=Brain-Spine-Nervous-System">Brain, Spine &amp; Nervous System</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;Topic[]=Mgh-Research-Scholar">MGH Research Scholar</a> </li> <li> <a href="/news/browse?Text=*&amp;PageType[]=article&amp;Start=1&amp;MaxResults=10&amp;summary=context&amp;MethodName=getlisting&amp;SortDesc[]=publishdate&amp;Topic[]=Research">Research</a> </li> </ul> </div> <div class="spotlight-card spotlight-card--basic spotlight-card--proof-point"> <div class="spotlight-card__inner"> <div class="spotlight-card__content"> <div class="spotlight-card__body"> <h3 class="spotlight-card__heading">Check out the Mass General Research Institute blog</h3> <p class="spotlight-card__description">Bench Press highlights the groundbreaking research and boundary-pushing scientists working to improve human health and fight disease.</p> </div> <div class="spotlight-card__footer"> <div class="spotlight-card__link"> <a xmlns:xlink="http://www.w3.org/1999/xlink" class="arrow-link" aria-label="Visit the Mass General Research Institute Blog" href="https://bit.ly/3cK45oz" target="_blank">Check |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/notices/medical-records&quot; |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/patient-experience&quot; |
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/visit&quot; |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/locations&quot; |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/visit/maps-and-directions&quot; |
| 88 |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/visit/parking-and-shuttles/parking&quot; |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/services&quot; |
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&lt;a class=&quot;arrow-link main-nav-col__link &quot; href=&quot;/visit/accessibility&quot; |
| 91 |
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On line 541, column 135 st&quot;&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/about/overview-of-the-research-institute&quot; |
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On line 544, column 119 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/researchers-laboratories&quot; |
| 93 |
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/news&quot; |
| 94 |
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On line 550, column 118 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/industry-collaborations&quot; |
| 95 |
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On line 553, column 114 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/innovation-programs&quot; |
| 96 |
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On line 566, column 123 st&quot;&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/education/community-outreach&quot; |
| 97 |
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On line 569, column 111 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/clinical-trials/&quot; |
| 98 |
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On line 572, column 102 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/support&quot; |
| 99 |
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On line 575, column 120 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--title&quot; href=&quot;/research/about/contact-information&quot; |
| 100 |
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On line 578, column 120 /li&gt;
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&lt;a class=&quot;arrow-link main-nav-col__link main-nav-col__link--blue&quot; href=&quot;https://researchers.mgh.harvard.edu/&quot; |
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