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repetitive impacts and concussion

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https://www.readbyqxmd.com/read/29802602/dependence-on-subconcussive-impacts-of-brain-metabolism-in-collision-sport-athletes-an-mr-spectroscopic-study
#1
Sumra Bari, Diana O Svaldi, Ikbeom Jang, Trey E Shenk, Victoria N Poole, Taylor Lee, Ulrike Dydak, Joseph V Rispoli, Eric A Nauman, Thomas M Talavage
Long term neurological impairments due to repetitive head trauma are a growing concern for collision sport athletes. American Football has the highest rate of reported concussions among male high school athletes, a position held by soccer for female high school athletes. Recent research has shown that subconcussive events experienced by collision sport athletes can be a further significant source of accrued damage. Collision sport athletes experience hundreds of subconcussive events in a single season, and these largely go uninvestigated as they produce no overt clinical symptoms...
May 25, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29754531/the-role-of-subconcussive-impacts-on-sway-velocities-in-division-i-men-s-lacrosse-players
#2
Theresa L Miyashita, Eleni Diakogeorgiou, Kaitlyn Marrie
Head impacts resulting in a concussion negatively affect the vestibular system, but little is known about the effect of subconcussive impacts on this system. This study's objective was to determine if subconcussive head impacts sustained over one competitive lacrosse season, effect sway velocity. Healthy Division I male lacrosse players (n = 33; aged 19.52 ± 1.20 years) wore instrumented helmets to track head impact exposures. At the beginning and end of the season the players completed an instrumented Balance Error Scoring System assessment to assess sway velocity...
May 12, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29734348/the-impact-of-tackle-football-injuries-on-the-american-healthcare-system-with-a-neurological-focus
#3
Michael J McGinity, Ramesh Grandhi, Joel E Michalek, Jesse S Rodriguez, Aron M Trevino, Ashley C McGinity, Ali Seifi
BACKGROUND: Recent interest in the study of concussion and other neurological injuries has heightened awareness of the medical implications of American tackle football injuries amongst the public. OBJECTIVE: Using the National Emergency Department Sample (NEDS) and the National Inpatient Sample (NIS), the largest publicly available all-payer emergency department and inpatient healthcare databases in the United States, we sought to describe the impact of tackle football injuries on the American healthcare system by delineating injuries, specifically neurological in nature, suffered as a consequence of tackle football between 2010 and 2013...
2018: PloS One
https://www.readbyqxmd.com/read/29526776/sub-concussive-trauma-acute-concussion-and-history-of-multiple-concussions-effects-on-quiet-stance-postural-control-stability
#4
J K Dierijck, A D Wright, J D Smirl, K Bryk, P van Donkelaar
Although balance control has been studied extensively following acute concussion, little is known regarding repetitive sub-concussive head impacts or chronic exposure to multiple concussive events. Quiet stance postural control was characterized in contact sport athletes at pre-season (n = 135) and post-season (n = 48) to evaluate the effects of subconcussive trauma to the head. To determine the impact of acute concussion on postural control, athletes diagnosed with a concussion during the season (n = 12) were tested at 72-h, 2-weeks, and 1-month post-injury...
March 8, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29498030/baseline-performance-of-ncaa-athletes-on-a-concussion-assessment-battery-a-report-from-the-care-consortium
#5
Barry P Katz, Maria Kudela, Jaroslaw Harezlak, Michael McCrea, Thomas McAllister, Steven P Broglio
BACKGROUND: Sport-related concussion and repetitive head impact exposure in contact sports continue to receive increased attention in public and medical spheres. The Concussion Assessment, Research and Education (CARE) Consortium, a multicenter cooperative, was established to study the natural history of concussion in National Collegiate Athletic Association (NCAA) collegiate student-athletes across 29 colleges and universities in the United States. The purpose of this investigation is to provide normative data from the CARE Consortium and evaluate for differences between sport categories...
March 1, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29402530/subconcussive-head-impacts-in-sport-a-systematic-review-of-the-evidence
#6
Lynda Mainwaring, Kaleigh M Ferdinand Pennock, Sandhya Mylabathula, Benjamin Z Alavie
PURPOSE: To identify and evaluate the evidence that examines subconcussive impacts in sport-specific settings, and address two objectives: a) to determine how 'subconcussion' is characterized in the current literature, and b) to identify directions for future research. RESEARCH DESIGN: Systematic review. METHODS AND PROCEDURES: CINAHL, EMBASE, MedLine, PsycINFO, SportDiscus, and Web of Science were searched for articles that sought to assess subconcussive impacts or outcomes related to non-concussive head impact exposure...
February 2, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29393677/effects-of-repetitive-subconcussive-head-trauma-on-the-neuropsychological-test-performance-of-high-school-athletes-a-comparison-of-high-moderate-and-low-contact-sports
#7
William T Tsushima, Hyeong Jun Ahn, Andrea M Siu, Kara Yoshinaga, So Yung Choi, Nathan M Murata
The aim of this study was to examine the neuropsychological test results of non-concussed high school athletes playing at three different levels of contact sports. Based on the concussion risk data of 12 different sports, a High Contact group (n=2819; wrestling/martial arts, cheerleading, track and field, football), a Moderate Contact group (n=2323; softball, basketball, soccer), and a Low Contact group (n=1580; baseball, volleyball, water polo, tennis, cross-country) were formed and compared in terms of their scores on the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)...
February 2, 2018: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/29334834/mild-jugular-compression-collar-ameliorated-changes-in-brain-activation-of-working-memory-after-one-soccer-season-in-female-high-school-athletes
#8
Weihong Yuan, Jonathan Dudley, Kim D Barber Foss, Jonathan D Ellis, Staci Thomas, Ryan T Galloway, Christopher A DiCesare, James L Leach, Janet Adams, Thomas Maloney, Brooke Gadd, David Smith, Jeff N Epstein, Dustin R Grooms, Kelsey Logan, David R Howell, Mekibib Altaye, Gregory D Myer
Recent neuroimaging studies have suggested that repetitive subconcussive head impacts, even after only one sport season, may lead to pre- to post-season structural and functional alterations in male high school football athletes. However, data on female athletes are limited. In the current investigation, we aimed to (1) assess the longitudinal pre- to post-season changes in functional MRI (fMRI) of working memory and working memory performance, (2) quantify the association between the pre- to post-season change in fMRI of working memory and the exposure to head impact and working memory performance, and (3) assess whether wearing a neck collar designed to reduce intracranial slosh via mild compression of the jugular veins can ameliorate the changes in fMRI brain activation observed in the female high school athletes who did not wear collars after a full soccer season...
March 27, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29279021/increased-myo-inositol-in-primary-motor-cortex-of-contact-sports-athletes-without-a-history-of-concussion
#9
Geneviève Lefebvre, Emilie Chamard, Sébastien Proulx, Sara Tremblay, Mark Halko, Salil Soman, Elaine de Guise, Alvaro Pascual-Leone, Hugo Théoret
The objective of the study was to determine whether repetitive hits to the head at a subclinical level are associated with structural and functional brain abnormalities and whether these effects are influenced by high levels of fitness associated with intense physical activity. Seventy-two college students were recruited: 24 nonathletic, 24 athletes practicing a varsity contact sport, and 24 athletes practicing a varsity noncontact sport. They were recruited for a neuropsychological evaluation and a magnetic resonance imaging session that included magnetic resonance spectroscopy of primary motor cortex (M1) and prefrontal cortex and susceptibility-weighted imaging...
February 9, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29204342/sex-differences-in-white-matter-alterations-following-repetitive-subconcussive-head-impacts-in-collegiate-ice-hockey-players
#10
Nico Sollmann, Paul S Echlin, Vivian Schultz, Petra V Viher, Amanda E Lyall, Yorghos Tripodis, David Kaufmann, Elisabeth Hartl, Philipp Kinzel, Lorie A Forwell, Andrew M Johnson, Elaine N Skopelja, Christian Lepage, Sylvain Bouix, Ofer Pasternak, Alexander P Lin, Martha E Shenton, Inga K Koerte
Objective: Repetitive subconcussive head impacts (RSHI) may lead to structural, functional, and metabolic alterations of the brain. While differences between males and females have already been suggested following a concussion, whether there are sex differences following exposure to RSHI remains unknown. The aim of this study was to identify and to characterize sex differences following exposure to RSHI. Methods: Twenty-five collegiate ice hockey players (14 males and 11 females, 20...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29149385/pre-clinical-models-in-pediatric-traumatic-brain-injury-challenges-and-lessons-learned
#11
REVIEW
Patrick M Kochanek, Jessica S Wallisch, Hülya Bayır, Robert S B Clark
PURPOSE: Despite the enormity of the problem and the lack of new therapies, research in the pre-clinical arena specifically using pediatric traumatic brain injury (TBI) models is limited. In this review, some of the key models addressing both the age spectrum of pediatric TBI and its unique injury mechanisms will be highlighted. Four topics will be addressed, namely, (1) unique facets of the developing brain important to TBI model development, (2) a description of some of the most commonly used pre-clinical models of severe pediatric TBI including work in both rodents and large animals, (3) a description of the pediatric models of mild TBI and repetitive mild TBI that are relatively new, and finally (4) a discussion of challenges, gaps, and potential future directions to further advance work in pediatric TBI models...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29122475/head-impact-exposure-from-match-participation-in-women-s-rugby-league-over-one-season-of-domestic-competition
#12
Doug A King, Patria A Hume, Conor Gissane, David C Kieser, Trevor N Clark
OBJECTIVES: To quantify the magnitude, frequency, duration and distribution of head impact exposure in a women's rugby league competition. DESIGN: Prospective cohort study. METHODS: Twenty-one players had a wireless impact measuring device (X2Biosystems XPatch) behind their right ear during match participation. Head impact data were collected and downloaded for analysis. Median peak linear and rotational accelerations and impact locations between player positions were assessed using a Friedman repeated measures ANOVA on ranks with a Wilcoxon signed-rank test for post hoc analysis with a Bonferroni correction...
February 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29077582/neuroimaging-in-the-diagnosis-of-chronic-traumatic-encephalopathy-a-systematic-review
#13
Philip Sparks, Tim Lawrence, Stephan Hinze
OBJECTIVE: Chronic traumatic encephalopathy (CTE) is a neurodegenerative tauopathy associated with repeated subconcussive and concussive head injury. Clinical features include cognitive, behavioral, mood, and motor impairments. Definitive diagnosis is only possible at postmortem. Here, the utility of neuroimaging in the diagnosis of CTE is evaluated by systematically reviewing recent evidence for changes in neuroimaging biomarkers in suspected cases of CTE compared with controls. DATA SOURCES: Providing an update on a previous systematic review of articles published until December 2014, we searched for articles published between December 2014 and July 2016...
October 25, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29073820/acute-changes-in-plasma-total-tau-levels-are-independent-of-subconcussive-head-impacts-in-college-football-players
#14
Keisuke Kawata, Leah H Rubin, Leroy Wesley, Jong Lee, Thomas Sim, Masahiro Takahagi, Al Bellamy, Ryan Tierney, Dianne Langford
Athletes in contact sports sustain repetitive subconcussive head impacts in a brief window, yet neurophysiological sequelae from repetitive subconcussion remain unclear. This prospective longitudinal study examined a relationship between changes in plasma Tau protein levels and subconcussive impact kinematic data in 23 Division-I collegiate football players during a series of pre-season practices. Plasma measures for Tau and S100β proteins, symptom scores, and near point of convergence were obtained at preseason baseline and pre-post practices...
October 26, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28982552/repetitive-head-impacts-do-not-affect-postural-control-following-a-competitive-athletic-season
#15
Nicholas G Murray, Katelyn E Grimes, Eric D Shiflett, Barry A Munkasy, Nathan R D'Amico, Megan E Mormile, Douglas W Powell, Thomas A Buckley
Evidence suggests that Repetitive Head Impacts (RHI) directly influence the brain over the course of a single contact collision season yet do not significantly impact a player's performance on the standard clinical concussion assessment battery. The purpose of this study was to investigate changes in static postural control after a season of RHI in Division I football athletes using more sensitive measures of postural control as compared to a non-head contact sports. Fourteen Division I football players (CON) (age=20...
October 2, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28654066/a-mouse-model-of-single-and-repetitive-mild-traumatic-brain-injury
#16
Bevan S Main, Stephanie S Sloley, Sonia Villapol, David N Zapple, Mark P Burns
Mild Traumatic Brain Injury (mTBI) can result in the acute loss of brain function, including a period of confusion, a loss of consciousness (LOC), focal neurological deficits and even amnesia. Athletes participating in contact sports are at high risk of exposure to large number of mTBIs. In terms of the level of injury in a sporting athlete, a mTBI is defined as a mild injury that does not cause gross pathological changes, but does cause short-term neurological deficits that are spontaneously resolved. Despite previous attempts to model mTBI in mice and rats, many have reported gross adverse effects including skull fractures, intracerebral bleeding, axonal injury and neuronal cell death...
June 20, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28631970/computerized-neuropsychological-test-performance-of-youth-football-players-at-different-positions-a-comparison-of-high-and-low-contact-players
#17
William T Tsushima, Hyeong Jun Ahn, Andrea M Siu, Tama Fukuyama, Nathan M Murata
The aim of this study was to examine the effects of head impact frequency on the neuropsychological test results of football players who participate in different positions on the team. Based on the biomechanical measures of head impact frequency reported in high school football, a High Contact group (n = 480) consisting of offensive and defensive linemen was compared with a Low Contact group (n = 640) comprised of receivers and defensive backs. The results revealed that the High Contact group obtained poorer performances on the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) on three Composite scores (Verbal Memory, Visual Motor Speed, Impulse Control) and the Total Symptom score compared to the Low Contact group...
February 28, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28615399/concussion-diagnosis-and-management-knowledge-and-attitudes-of-family-medicine-residents
#18
Aneetinder Mann, Charles H Tator, James D Carson
OBJECTIVE: To assess the knowledge of, attitudes toward, and learning needs for concussion diagnosis and management among family medicine residents. DESIGN: E-mail survey. SETTING: University of Toronto in Ontario. PARTICIPANTS: Family medicine residents (N = 348). MAIN OUTCOME MEASURES: To describe relationships between awareness of concussion management and lifestyle, education background, and residency placement, t tests and 2 tests were used as appropriate...
June 2017: Canadian Family Physician Médecin de Famille Canadien
https://www.readbyqxmd.com/read/28614998/a-season-of-american-football-is-not-associated-with-changes-in-plasma-tau
#19
Jonathan M Oliver, Margaret T Jones, Anthony J Anzalone, K Michele Kirk, David A Gable, Justin T Repshas, Torie A Johnson, Kina Höglund, Kaj Blennow, Henrik Zetterberg
American football athletes are routinely exposed to sub-concussive impacts over the course of the season. This study sought to examine the effect of a season of American football on plasma tau, a potential marker of axonal damage. Nineteen National Collegiate Athletic Association (NCAA) football athletes underwent serial blood sampling over the course of the 2014-2015 season at those times in which the number and magnitude of head impacts likely changed. Non-contact sport controls (NCAA men's swim athletes; n = 19) provided a single plasma sample for comparison...
December 1, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28471243/utility-of-providing-a-concussion-definition-in-the-assessment-of-concussion-history-in-former-nfl-players
#20
Michael L Alosco, Johnny Jarnagin, Yorghos Tripodis, Brett Martin, Christine Chaisson, Christine M Baugh, Alcy Torres, Christopher J Nowinski, Robert C Cantu, Robert A Stern
OBJECTIVE: Former National Football League (NFL) players' working knowledge of concussion has not yet been evaluated, despite this population being a major clinical research target due to the association between repetitive head impacts (RHI) and long-term clinical impairments. This study examined former NFL players' understanding of the current concussion definition, and the association between number of concussions with clinical function. METHODS: 95 former NFL players (mean age = 55...
2017: Brain Injury: [BI]
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