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Concussions, traumatic brain injuries, head injuries

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https://www.readbyqxmd.com/read/28620350/considerations-for-experimental-animal-models-of-concussion-traumatic-brain-injury-and-chronic-traumatic-encephalopathy-these-matters-matter
#1
REVIEW
Mark W Wojnarowicz, Andrew M Fisher, Olga Minaeva, Lee E Goldstein
Animal models of concussion, traumatic brain injury (TBI), and chronic traumatic encephalopathy (CTE) are widely available and routinely deployed in laboratories around the world. Effective animal modeling requires careful consideration of four basic principles. First, animal model use must be guided by clarity of definitions regarding the human disease or condition being modeled. Concussion, TBI, and CTE represent distinct clinical entities that require clear differentiation: concussion is a neurological syndrome, TBI is a neurological event, and CTE is a neurological disease...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28599608/a-brain-electrical-activity-eeg-based-biomarker-of-functional-impairment-in-traumatic-head-injury-a-multisite-validation-trial
#2
Daniel Hanley, Leslie S Prichep, Neeraj Badjatia, Jeff Bazarian, RIchard P Chiacchierini, Kenneth C Curley, John S Garrett, Elizabeth B Jones, Rosanne Naunheim, Brian J O'Neil, John O'Neill, Wright David, J Stephen Huff
The potential clinical utility of a novel quantitative EEG-based Brain Function Index (BFI) as a measure of the presence and severity of functional brain injury was studied as part of an independent prospective validation trial. The BFI was derived using EEG features associated with functional brain impairment reflecting current consensus on the physiology of concussive injury. 720 adult patients (18-85 years) evaluated within 72 hours of sustaining a closed head injury were enrolled at 11 US Emergency Departments...
June 9, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28544811/differential-protein-expression-in-exosomal-samples-taken-from-trauma-patients
#3
Ron B Moyron, Amber Gonda, Matthew J Selleck, Xian Luo-Owen, Richard D Catalano, Thomas O'Callahan, Carlos Garberoglio, David Turay, Nathan R Wall
Traumatic Brain Injuries (TBI) are among the most misdiagnosed and underreported types of head trauma. The potential long-term impact of undiagnosed or incorrectly identified concussions and other head injuries are potentially devastating, as evidenced by the increasing societal burden exhibited by soldiers returning from combat and athletes in contact sports. Concussions and TBI are notoriously difficult to correctly diagnose and prognosis for these injuries is poorly understood. In order to increase the likelihood of successful diagnosis, treatment, and prediction of outcomes, a definitive differential diagnosis will need to be established...
May 25, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/28535722/anisotropic-polyethersulfone-foam-for-bicycle-helmet-liners-to-reduce-rotational-acceleration-during-oblique-impact
#4
Kelly Vanden Bosche, Yasmine Mosleh, Bart Depreitere, Jos Vander Sloten, Ignaas Verpoest, Jan Ivens
Although current standard bicycle helmets protect cyclists against linear acceleration, they still lack sufficient protection against rotational acceleration during oblique impact events. Rotational acceleration is correlated with serious traumatic brain injuries such as acute subdural haematoma and thus should be minimized. This study proposes using highly anisotropic polyethersulfone foam for bicycle helmet liners in order to limit the rotational acceleration. Helmet prototypes, made of polyethersulfone foam with cell anisotropy direction perpendicular to the head, have been produced and compared to a standard commercial helmet...
May 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28527643/parental-knowledge-and-recall-of-concussion-discharge-instructions
#5
Danny George Thomas, Lia Bradley, Ashley Servi, Suzanne Reilly, Jennifer Niskala Apps, Michael McCrea, Thomas Hammeke
INTRODUCTION: Children increasingly are being seen in the emergency department for a concussion, or mild traumatic brain injury (mTBI). A key aim of the ED visit is to provide discharge advice that can help parents to identify an evolving neurosurgical crisis, facilitate recovery, and prevent reinjury. The present study examined parents' knowledge of symptoms and recall of discharge instructions after their adolescent's mTBI and the effect of supplementing written discharge instructions with verbal instruction and reinforcement...
May 17, 2017: Journal of Emergency Nursing: JEN: Official Publication of the Emergency Department Nurses Association
https://www.readbyqxmd.com/read/28520686/clinical-correlates-to-assist-with-chronic-traumatic-encephalopathy-diagnosis-insights-from-a-novel-rodent-repeat-concussion-model
#6
Gretchen M Thomsen, Ara Ko, Megan Y Harada, Annie Ma, Livia Wyss, Patricia Haro, Jean-Philippe Vit, Pablo Avalos, Navpreet K Dhillon, Noell Cho, Oksana Shelest, Eric J Ley
INTRODUCTION: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repetitive head injuries. Chronic traumatic encephalopathy symptoms include changes in mood, behavior, cognition, and motor function; however, CTE is currently diagnosed only postmortem. Using a rat model of recurrent traumatic brain injury (TBI), we demonstrate rodent deficits that predict the severity of CTE-like brain pathology. METHODS: Bilateral, closed-skull, mild TBI was administered once per week to 35 wild-type rats; eight rats received two injuries (2×TBI), 27 rats received five injuries (5×TBI), and 13 rats were sham controls...
June 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28499787/motocross-associated-head-and-spine-injuries-in-adult-patients-evaluated-in-an-emergency-department
#7
Lucas Oliveira J E Silva, M Fernanda Bellolio, Elisa M Smith, David J Daniels, Christine M Lohse, Ronna L Campbell
BACKGROUND: Motor vehicle-related injuries (including off-road) are the leading cause of traumatic brain injury (TBI) and acute traumatic spinal cord injury in the United States. OBJECTIVES: To describe motocross-related head and spine injuries of adult patients presenting to an academic emergency department (ED). METHODS: We performed an observational cohort study of adult ED patients evaluated for motocross-related injuries from 2010 through 2015...
April 27, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28434160/repeated-mild-traumatic-brain-injuries-is-not-associated-with-volumetric-differences-in-former-high-school-football-players
#8
Douglas P Terry, L Stephen Miller
We investigated potential brain volumetric differences in a sample of former high school football players many years after these injuries. Forty community-dwelling males ages 40-65 who played high school football, but not college or professional sports, were recruited. The experimental group (n = 20) endorsed experiencing two or more mTBIs on an empirically validated mTBI assessment tool (median = 3, range = 2-15). The control group (n = 20) denied ever experiencing an mTBI. Participants completed a self-report index of current mTBI symptomatology and underwent high-resolution T1-weighted MRI scanning, which were analyzed using the Freesurfer software package...
April 22, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28404801/serum-neurofilament-light-as-a-biomarker-for-mild-traumatic-brain-injury-in-contact-sports
#9
Pashtun Shahim, Henrik Zetterberg, Yelverton Tegner, Kaj Blennow
OBJECTIVE: To evaluate whether the axonal protein neurofilament light (NFL) in serum is a sensitive biomarker to detect subtle brain injury or concussion in contact sports athletes. METHODS: Two prospective cohort studies involving (1) 14 Swedish amateur boxers who underwent fluid biomarker assessments at 7-10 days after bout and after 3 months of rest from boxing and (2) 35 Swedish professional hockey players who underwent blood biomarker assessment at 1, 12, 36, and 144 hours after concussion and when the players returned to play were performed...
May 9, 2017: Neurology
https://www.readbyqxmd.com/read/28394205/a-three-dimensional-computational-human-head-model-that-captures-live-human-brain-dynamics
#10
Shailesh Ganpule, Nitin P Daphalapurkar, Kaliat T Ramesh, Andrew K Knutsen, Dzung L Pham, Philip V Bayly, Jerry L Prince
Diffuse axonal injury (DAI) is a debilitating consequence of traumatic brain injury (TBI) attributed to abnormal stretching of axons caused by blunt head trauma or acceleration of the head. We developed an anatomically accurate, subject-specific, three-dimensional (3D) computational model of the human brain, and used it to study the dynamic deformations in the substructures of the brain when the head is subjected to rotational accelerations. The computational head models use anatomy and morphology of the white matter fibers obtained using MRI...
April 10, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28387556/long-term-cognitive-and-neuropsychiatric-consequences-of-repetitive-concussion-and-head-impact-exposure
#11
REVIEW
Thomas McAllister, Michael McCrea
Initially, interest in sport-related concussion arose from the premise that the study of athletes engaged in sports associated with high rates of concussion could provide insight into the mechanisms, phenomenology, and recovery from mild traumatic brain injury. Over the last decade, concerns have focused on the possibility that, for some athletes, repetitive concussions may raise the long-term risk for cognitive decline, neurobehavioral changes, and neurodegenerative disease. First conceptualized as a discrete event with variable recovery trajectories, concussion is now viewed by some as a trigger of neurobiological events that may influence neurobehavioral function over the course of the life span...
March 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28381654/disorder-of-executive-function-of-the-brain-after-head-injury-and-mild-traumatic-brain-injury-neuroimaging-and-diagnostic-criteria-for-implementation-of-administrative-support-in-japan
#12
Jun Shinoda, Yoshitaka Asano
The diagnotic criteria for disorder of the executive function of the brain (DEFB) as a syndrome of sequela were administratively established (ad-DEFB) in Japan in 2006 to support disabled patients whose impairment, limited to cognition (memory, attention, execution, and behavior), emerges after organic brain injuries regardless of physical deficits. However, some patients suffering from traumatic brain injury (TBI) have been excluded from receiving medico-social services. In particular, this tendency is more prominent in patients with mild TBI because no lesions are apparent on conventional computed tomography (CT) or magnetic resonance imaging (MRI) in the chronic phase...
May 15, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28365745/consistency-of-self-reported-neurocognitive-symptoms-post-traumatic-stress-disorder-symptoms-and-concussive-events-from-end-of-first-deployment-to-veteran-health-administration-comprehensive-traumatic-brain-injury-evaluation-by-operations-enduring-freedom-iraqi
#13
Arthur C Russo, Esther C Fingerhut
Objective: This study examined the consistency of self-reported symptoms and concussive events in combat veterans who reported experiencing concussive events. Method: One hundred and forty, single deployed, Operation Enduring Freedom, Operation Iraqi Freedom and Operation New Dawn combat veterans with Veteran Health Administration (VHA) Comprehensive Traumatic Brain Injury Evaluations (CTBIE) and no post-deployment head injury were examined to assess consistency of self-reported (a) traumatic brain injury (TBI)-related symptoms, (b) post-traumatic stress disorder (PTSD)-related symptoms, and (c) TBI-related concussive events from soon after deployment to time of VHA CTBIE...
March 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28343463/prospective-head-to-head-study-of-three-computerized-neurocognitive-assessment-tools-part-2-utility-for-assessment-of-mild-traumatic-brain-injury-in-emergency-department-patients
#14
Lindsay D Nelson, Robyn E Furger, Peter Gikas, E Brooke Lerner, William B Barr, Thomas A Hammeke, Christopher Randolph, Kevin Guskiewicz, Michael A McCrea
OBJECTIVES: The aim of this study was to evaluate the reliability and validity of three computerized neurocognitive assessment tools (CNTs; i.e., ANAM, DANA, and ImPACT) for assessing mild traumatic brain injury (mTBI) in patients recruited through a level I trauma center emergency department (ED). METHODS: mTBI (n=94) and matched trauma control (n=80) subjects recruited from a level I trauma center emergency department completed symptom and neurocognitive assessments within 72 hr of injury and at 15 and 45 days post-injury...
March 27, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28338593/clinical-correlates-to-assist-with-cte-diagnosis-insights-from-a-novel-rodent-repeat-concussion-model
#15
Gretchen M Thomsen, Ara Ko, Megan Y Harada, Annie Ma, Livia Wyss, Patricia Haro, Jean-Philippe Vit, Pablo Avalos, Navpreet Dhillon, Noell Cho, Oksana Shelest, Eric J Ley
INTRODUCTION: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repetitive head injuries. CTE symptoms include changes in mood, behavior, cognition and motor function, however CTE is only currently diagnosed post-mortem. Using a rat model of recurrent traumatic brain injury (TBI) we demonstrate rodent deficits that predict the severity of CTE-like brain pathology. METHODS: Bilateral, closed skull, mild TBI was administered once per week to 35 WT rats, 8 rats received 2 injuries ('2xTBI'), 27 rats received 5 injuries ('5xTBI') and 13 rats were sham controls...
March 23, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28326890/functional-and-molecular-correlates-following-single-and-repeated-rat-closed-head-concussion-indices-of-vulnerability-following-brain-injury
#16
Andrea Mountney, Angela Boutte, Casandra M Cartagena, William J Flerlage, David Johnson, Chanyang Rho, Xi-Chun M Lu, Angela M Yarnell, Sean R Marcsisin, Jason Sousa, Chau Vuong, Victor E Zottig, Lai Yee Leung, Ying Deng-Bryant, Janice Gilsdorf, Frank C Tortella, Deborah A Shear
Closed-head concussive injury is one of the most common causes of traumatic brain injury (TBI). Isolated concussions frequently produce acute neurological impairments; however, individuals typically recover spontaneously within a short time frame. In contrast, brain injuries resulting from multiple concussions can result in cumulative damage and elevated risk of developing chronic brain pathologies, including chronic traumatic encephalopathy (CTE). Increased attention has focused on identification of diagnostic markers that can prognostically serve as indices of brain health after injury, revealing the temporal profile of vulnerability to a second insult...
March 22, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28324787/interactive-ebooks-in-educating-patients-and-their-families-about-head-injury-regardless-of-age
#17
Ronald Sahyouni, Amin Mahmoodi, Amir Mahmoodi, Melissa Huang, Diem Kieu Tran, Jefferson W Chen
OBJECTIVES: Traumatic Brain Injury (TBI) is a common and debilitating injury that is particularly prevalent in patients over 60. Given the influence of head injury on dementia (and vice versa), and the increased likelihood of ground-level falls, elderly patients are vulnerable to TBI. Educational interventions can increase knowledge and influence preventative activity to decrease the likelihood of further TBI. We sought to determine the efficacy of interactive tablet-based educational interventions in elderly patients on self-reported knowledge...
March 8, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28298170/concussion-induces-hippocampal-circuitry-disruption-in-swine
#18
John A Wolf, Brian N Johnson, Victoria E Johnson, Mary E Putt, Kevin D Browne, Constance J Mietus, Daniel P Brown, Kathryn L Wofford, Douglas H Smith, M Sean Grady, Akiva S Cohen, D Kacy Cullen
Hippocampal-dependent deficits in learning and memory formation are a prominent feature of traumatic brain injury (TBI); however, the role of the hippocampus in cognitive dysfunction after concussion (mild TBI) is unknown. We therefore investigated functional and structural changes in the swine hippocampus following TBI using a model of head rotational acceleration that closely replicates the biomechanics and neuropathology of closed-head TBI in humans. We examined neurophysiological changes using a novel ex vivo hippocampal slice paradigm with extracellular stimulation and recording in the dentate gyrus and CA1 occurring at 7 days following non-impact inertial TBI in swine...
May 4, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28269244/portable-video-oculography-device-for-implementation-in-sideline-concussion-assessments-a-prototype
#19
Joshua D Fischer, Dawie J van den Heever
Concussion is currently a serious health problem and can lead to severe brain dysfunction. There is a definite need for sensitive and reliable tests to detect and evaluate the subtle changes in brain function caused by concussion. This study details the development of a low cost portable eye tracking device that can aid in the detection of concussions. The device evaluates ocular motor function and can be used on the sidelines of sporting events to give a quick indication of the severity of head trauma. It can further be used to evaluate and monitor mild Traumatic Brain Injuries and aid in the return to play decision making process...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227478/portable-video-oculography-device-for-implementation-in-sideline-concussion-assessments-a-prototype
#20
Joshua D Fischer, Dawie J van den Heever, Joshua D Fischer, Dawie J van den Heever, Dawie J Van den Heever, Joshua D Fischer
Concussion is currently a serious health problem and can lead to severe brain dysfunction. There is a definite need for sensitive and reliable tests to detect and evaluate the subtle changes in brain function caused by concussion. This study details the development of a low cost portable eye tracking device that can aid in the detection of concussions. The device evaluates ocular motor function and can be used on the sidelines of sporting events to give a quick indication of the severity of head trauma. It can further be used to evaluate and monitor mild Traumatic Brain Injuries and aid in the return to play decision making process...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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