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https://www.readbyqxmd.com/read/28452600/comparison-of-neurocognitive-performance-in-contact-and-noncontact-nonconcussed-high-school-athletes-across-a-two-year-interval
#1
Benjamin L Brett, Gary S Solomon
Investigating short-term effects of subconcussive impacts on neurocognitive functioning, we employed a repeated measures multivariate model and regression-based measure to examine neurocognitive changes in 771 contact and noncontact high school athletes over a two-year period. Results reveal significant changes in Visual Motor Speed for both groups over a two-year period, with small effect sizes. According to regression-based measures, differences in contact sport athletes' expected Time 2 performances were significant for Visual Motor Speed, also with minimal effects...
2017: Developmental Neuropsychology
https://www.readbyqxmd.com/read/28393012/the-effect-of-repetitive-subconcussive-collisions-on-brain-integrity-in-collegiate-football-players-over-a-single-football-season-a-multi-modal-neuroimaging-study
#2
Semyon M Slobounov, Alexa Walter, Hans C Breiter, David C Zhu, Xiaoxiao Bai, Tim Bream, Peter Seidenberg, Xianglun Mao, Brian Johnson, Thomas M Talavage
The cumulative effect of repetitive subconcussive collisions on the structural and functional integrity of the brain remains largely unknown. Athletes in collision sports, like football, experience a large number of impacts across a single season of play. The majority of these impacts, however, are generally overlooked, and their long-term consequences remain poorly understood. This study sought to examine the effects of repetitive collisions across a single competitive season in NCAA Football Bowl Subdivision athletes using advanced neuroimaging approaches...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28269777/what-is-the-relationship-of-traumatic-brain-injury-to-dementia
#3
Mario F Mendez
There is a long history linking traumatic brain injury (TBI) with the development of dementia. Despite significant reservations, such as recall bias or concluding causality for TBI, a summary of recent research points to several conclusions on the TBI-dementia relationship. 1) Increasing severity of a single moderate-to-severe TBI increases the risk of subsequent Alzheimer's disease (AD), the most common type of dementia. 2) Repetitive, often subconcussive, mild TBIs increases the risk for chronic traumatic encephalopathy (CTE), a degenerative neuropathology...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28225689/sex-differences-in-anthropometrics-and-heading-kinematics-among-division-i-soccer-athletes
#4
Abigail C Bretzin, Jamie L Mansell, Ryan T Tierney, Jane K McDevitt
BACKGROUND: Soccer players head the ball repetitively throughout their careers; this is also a potential mechanism for a concussion. Although not all soccer headers result in a concussion, these subconcussive impacts may impart acceleration, deceleration, and rotational forces on the brain, leaving structural and functional deficits. Stronger neck musculature may reduce head-neck segment kinematics. HYPOTHESIS: The relationship between anthropometrics and soccer heading kinematics will not differ between sexes...
March 2017: Sports Health
https://www.readbyqxmd.com/read/28181857/subconcussive-impact-dependent-increase-in-plasma-s100%C3%AE-levels-in-collegiate-football-players
#5
Keisuke Kawata, Leah H Rubin, Masahiro Takahagi, Jong Hyun Lee, Thomas Sim, Victor Szwanki, Al Bellamy, Ryan Tierney, Dianne Langford
The current study investigates whether repetitive subconcussive impacts cause changes in plasma S100β levels, and also tests the associations between S100β changes and frequency/magnitude of impacts sustained. This prospective study of 22 Division-I collegiate football players included baseline and pre-season practices (one helmet-only and four full-gear). Blood samples were obtained and assessed for S100β levels at baseline and pre- to post-practices; symptom scores were assessed at each time-point. An accelerometer-embedded mouthguard was employed to measure the number of impacts (hits), peak linear acceleration (PLA), and peak rotational acceleration (PRA)...
April 27, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28148628/heading-in-soccer-more-than-a-subconcussive-event
#6
EDITORIAL
Hester Lingsma, Andrew Maas
No abstract text is available yet for this article.
February 28, 2017: Neurology
https://www.readbyqxmd.com/read/28060567/correlation-of-head-impacts-to-change-in-balance-error-scoring-system-scores-in-division-i-men-s-lacrosse-players
#7
Theresa L Miyashita, Eleni Diakogeorgiou, Kaitlyn Marrie
BACKGROUND: Investigation into the effect of cumulative subconcussive head impacts has yielded various results in the literature, with many supporting a link to neurological deficits. Little research has been conducted on men's lacrosse and associated balance deficits from head impacts. HYPOTHESES: (1) Athletes will commit more errors on the postseason Balance Error Scoring System (BESS) test. (2) There will be a positive correlation to change in BESS scores and head impact exposure data...
January 1, 2017: Sports Health
https://www.readbyqxmd.com/read/27893897/imaging-of-glial-cell-activation-and-white-matter-integrity-in-brains-of-active-and-recently-retired-national-football-league-players
#8
Jennifer M Coughlin, Yuchuan Wang, Il Minn, Nicholas Bienko, Emily B Ambinder, Xin Xu, Matthew E Peters, John W Dougherty, Melin Vranesic, Soo Min Koo, Hye-Hyun Ahn, Merton Lee, Chris Cottrell, Haris I Sair, Akira Sawa, Cynthia A Munro, Christopher J Nowinski, Robert F Dannals, Constantine G Lyketsos, Michael Kassiou, Gwenn Smith, Brian Caffo, Susumu Mori, Tomas R Guilarte, Martin G Pomper
Importance: Microglia, the resident immune cells of the central nervous system, play an important role in the brain's response to injury and neurodegenerative processes. It has been proposed that prolonged microglial activation occurs after single and repeated traumatic brain injury, possibly through sports-related concussive and subconcussive injuries. Limited in vivo brain imaging studies months to years after individuals experience a single moderate to severe traumatic brain injury suggest widespread persistent microglial activation, but there has been little study of persistent glial cell activity in brains of athletes with sports-related traumatic brain injury...
January 1, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/27853132/traumatic-brain-injuries
#9
REVIEW
Kaj Blennow, David L Brody, Patrick M Kochanek, Harvey Levin, Ann McKee, Gerard M Ribbers, Kristine Yaffe, Henrik Zetterberg
Traumatic brain injuries (TBIs) are clinically grouped by severity: mild, moderate and severe. Mild TBI (the least severe form) is synonymous with concussion and is typically caused by blunt non-penetrating head trauma. The trauma causes stretching and tearing of axons, which leads to diffuse axonal injury - the best-studied pathogenetic mechanism of this disorder. However, mild TBI is defined on clinical grounds and no well-validated imaging or fluid biomarkers to determine the presence of neuronal damage in patients with mild TBI is available...
November 17, 2016: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/27829969/chronic-traumatic-encephalopathy-in-athletes-involved-with-high-impact-sports
#10
Cyrus Safinia, Eric M Bershad, H Brent Clark, Karen SantaCruz, Naila Alakbarova, Jose I Suarez, Afshin A Divani
BACKGROUND AND PURPOSE: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease occurring most commonly in athletes and is caused by repeated concussive or subconcussive blows to the head. The main purpose of this review is to evaluate the published literature on chronic traumatic encephalopathy (CTE) in athletes participating in high-impact sports. In particular, we highlight the significance of concussive and subconcussive impacts in multiple sports, elucidate the differences between clinical/pathological features of CTE and related neurodegenerative diseases, and provide an explanation for the variation in clinical presentation between athletes of different sports...
October 2016: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/27815240/persistent-effects-of-playing-football-and-associated-subconcussive-head-trauma-on-brain-structure-and-function-a-systematic-review-of-the-literature
#11
REVIEW
A A Tarnutzer, D Straumann, P Brugger, N Feddermann-Demont
AIM/OBJECTIVE: There is ongoing controversy about persistent neurological deficits in active and former football (soccer) players. We reviewed the literature for associations between football activities (including heading/head injuries) and decline in brain structure/function. DESIGN: Systematic literature review. DATA SOURCES: MEDLINE, Embase, PsycINFO, CINAHL, Cochrane-CRCT, SportDiscus, Cochrane-DSR=4 (accessed 2 August 2016). ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Original studies reporting on football-related persistent effects on brain structure/function...
November 4, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27775478/subconcussive-head-impact-exposure-and-white-matter-tract-changes-over-a-single-season-of-youth-football
#12
Naeim Bahrami, Dev Sharma, Scott Rosenthal, Elizabeth M Davenport, Jillian E Urban, Benjamin Wagner, Youngkyoo Jung, Christopher G Vaughan, Gerard A Gioia, Joel D Stitzel, Christopher T Whitlow, Joseph A Maldjian
Purpose To examine the effects of subconcussive impacts resulting from a single season of youth (age range, 8-13 years) football on changes in specific white matter (WM) tracts as detected with diffusion-tensor imaging in the absence of clinically diagnosed concussions. Materials and Methods Head impact data were recorded by using the Head Impact Telemetry system and quantified as the combined-probability risk-weighted cumulative exposure (RWECP). Twenty-five male participants were evaluated for seasonal fractional anisotropy (FA) changes in specific WM tracts: the inferior fronto-occipital fasciculus (IFOF), inferior longitudinal fasciculus, and superior longitudinal fasciculus (SLF)...
December 2016: Radiology
https://www.readbyqxmd.com/read/27297660/white-matter-changes-and-confrontation-naming-in-retired-aging-national-football-league-athletes
#13
Jeremy F Strain, Nyaz Didehbani, Jeffrey Spence, Heather Conover, Elizabeth K Bartz, Sethesh Mansinghani, Myrtle K Jeroudi, Neena K Rao, Lindy M Fields, Michael A Kraut, C Munro Cullum, John Hart, Kyle B Womack
Using diffusion tensor imaging (DTI), we assessed the relationship of white matter integrity and performance on the Boston Naming Test (BNT) in a group of retired professional football players and a control group. We examined correlations between fractional anisotropy (FA) and mean diffusivity (MD) with BNT T-scores in an unbiased voxelwise analysis processed with tract-based spatial statistics (TBSS). We also analyzed the DTI data by grouping voxels together as white matter tracts and testing each tract's association with BNT T-scores...
January 15, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27281278/quantifying-head-impacts-in-collegiate-lacrosse
#14
Bryson B Reynolds, James Patrie, Erich J Henry, Howard P Goodkin, Donna K Broshek, Max Wintermark, T Jason Druzgal
BACKGROUND: Concussion and repetitive head impact in sports has increased interest and concern for clinicians, scientists, and athletes. Lacrosse is the fastest growing sport in the United States, but the burden of head impact in lacrosse is unknown. PURPOSE: The goal of this pilot study was to quantify head impact associated with practicing and playing collegiate lacrosse while subjects were fitted with wearable accelerometers. STUDY DESIGN: Descriptive epidemiology study...
June 8, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27258455/subconcussive-head-trauma-and-near-point-of-convergence
#15
Andrew G Lee, Steven L Galetta
No abstract text is available yet for this article.
July 1, 2016: JAMA Ophthalmology
https://www.readbyqxmd.com/read/27257799/association-of-football-subconcussive-head-impacts-with-ocular-near-point-of-convergence
#16
Keisuke Kawata, Leah H Rubin, Jong Hyun Lee, Thomas Sim, Masahiro Takahagi, Victor Szwanki, Al Bellamy, Kurosh Darvish, Soroush Assari, Jeffrey D Henderer, Ryan Tierney, Dianne Langford
IMPORTANCE: An increased understanding of the relationship between subconcussive head impacts and near point of convergence (NPC) ocular-motor function may be useful in delineating traumatic brain injury. OBJECTIVE: To investigate whether repetitive subconcussive head impacts during preseason football practice cause changes in NPC. DESIGN, SETTING, AND PARTICIPANTS: This prospective, observational study of 29 National Collegiate Athletic Association Division I football players included baseline and preseason practices (1 noncontact and 4 contact), and postseason follow-up and outcome measures were obtained for each time...
July 1, 2016: JAMA Ophthalmology
https://www.readbyqxmd.com/read/27184060/the-pathophysiology-of-concussion
#17
REVIEW
Meeryo C Choe
Concussion is a significant issue in medicine and the media today. With growing interest on the long-term effects of sports participation, it is important to understand what occurs in the brain after an impact of any degree. While some of the basic pathophysiology has been elucidated, much is still unknown about what happens in the brain after traumatic brain injury, particularly with milder injuries where no damage can be seen at the structural level on standard neuroimaging. Understanding the chain of events from a cellular level using studies investigating more severe injuries can help to drive research efforts in understanding the symptomatology that is seen in the acute phase after concussion, as well as point to mechanisms that may underlie persistent post-concussive symptoms...
June 2016: Current Pain and Headache Reports
https://www.readbyqxmd.com/read/27154859/potential-long-term-consequences-of-concussive-and-subconcussive-injury
#18
REVIEW
Bertrand R Huber, Michael L Alosco, Thor D Stein, Ann C McKee
Repeated concussive and subconcussive trauma is associated with the later development of chronic traumatic encephalopathy (CTE), a neurodegenerative disease associated with clinical symptoms in multiple domains and a unique pattern of pathologic changes. CTE has been linked to boxing and American football; CTE has also been identified in soccer, ice hockey, baseball, rugby, and military service. To date, most large studies of CTE have come from enriched cohorts associated with brain bank donations for traumatic brain injury, although several recent studies re-examining neurodegenerative disease brain banks suggest that CTE is more common than is currently appreciated...
May 2016: Physical Medicine and Rehabilitation Clinics of North America
https://www.readbyqxmd.com/read/27142534/minimizing-head-acceleration-in-soccer-a-review-of-the-literature
#19
REVIEW
Jaclyn B Caccese, Thomas W Kaminski
Physicians and healthcare professionals are often asked for recommendations on how to keep athletes safe during contact sports such as soccer. With an increase in concussion awareness and concern about repetitive subconcussion, many parents and athletes are interested in mitigating head acceleration in soccer, so we conducted a literature review on factors that affect head acceleration in soccer. We searched electronic databases and reference lists to find studies using the keywords 'soccer' OR 'football' AND 'head acceleration'...
November 2016: Sports Medicine
https://www.readbyqxmd.com/read/27047444/effects-of-soccer-heading-on-brain-structure-and-function
#20
REVIEW
Ana Carolina Rodrigues, Rodrigo Pace Lasmar, Paulo Caramelli
Soccer is the most popular sport in the world, with more than 265 million players worldwide, including professional and amateur ones. Soccer is unique in comparison to other sports, as it is the only sport in which participants purposely use their head to hit the ball. Heading is considered as an offensive or defensive move whereby the player's unprotected head is used to deliberately impact the ball and direct it during play. A soccer player can be subjected to an average of 6-12 incidents of heading the ball per competitive game, where the ball reaches high velocities...
2016: Frontiers in Neurology
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