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By Joe Weatherly FM/Hospitalist-CoFounder of QuestioningMedicine and PCRAP contributor.
Ashley Robb Swan, Sharon Nichols, Angela Drake, AnneMarie Angeles, Mithun Diwakar, Tao Song, Roland R Lee, Ming-Xiong Huang
Mild traumatic brain injury (mTBI) is common in the United States, accounting for as many as 75-80% of all TBIs. It is recognized as a significant public health concern, but there are ongoing controversies regarding the etiology of persistent symptoms post-mTBI. This constellation of nonspecific symptoms is referred to as postconcussive syndrome (PCS). The present study combined results from magnetoencephalography (MEG) and cognitive assessment to examine group differences and relationships between brain activity and cognitive performance in 31 military and civilian individuals with a history of mTBI+PCS and 33 matched healthy control subjects...
October 1, 2015: Journal of Neurotrauma
Aaron J Carman, Rennie Ferguson, Robert Cantu, R Dawn Comstock, Penny A Dacks, Steven T DeKosky, Sam Gandy, James Gilbert, Chad Gilliland, Gerard Gioia, Christopher Giza, Michael Greicius, Brian Hainline, Ronald L Hayes, James Hendrix, Barry Jordan, James Kovach, Rachel F Lane, Rebekah Mannix, Thomas Murray, Tad Seifert, Diana W Shineman, Eric Warren, Elisabeth Wilde, Huntington Willard, Howard M Fillit
Sports-related concussions and repetitive subconcussive exposure are increasingly recognized as potential dangers to paediatric populations, but much remains unknown about the short-term and long-term consequences of these events, including potential cognitive impairment and risk of later-life dementia. This Expert Consensus Document is the result of a 1-day meeting convened by Safe Kids Worldwide, the Alzheimer's Drug Discovery Foundation, and the Andrews Institute for Orthopaedics and Sports Medicine. The goal is to highlight knowledge gaps and areas of critically needed research in the areas of concussion science, dementia, genetics, diagnostic and prognostic biomarkers, neuroimaging, sports injury surveillance, and information sharing...
April 2015: Nature Reviews. Neurology
Margot Putukian, Ruben Echemendia, Annegret Dettwiler-Danspeckgruber, Tawny Duliba, Jared Bruce, John L Furtado, Murali Murugavel
OBJECTIVE: To evaluate the utility of the Sideline Concussion Assessment Tool (SCAT)-2 in collegiate athletes with sport-related concussion. DESIGN: Prospective cross-sectional study with baseline testing and serial repeat testing after concussion in contact sport athletes and non-concussed control athletes. SETTING: Division I University. PARTICIPANTS: Male and female club rugby and varsity athletes. INTERVENTIONS: Baseline measures of concussion symptoms, cognitive function, and balance were obtained using the SCAT-2...
January 2015: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
Yusuke Nakayama, Tracey Covassin, Philip Schatz, Sally Nogle, Jeff Kovan
BACKGROUND: Test-retest reliability is a critical issue in the utility of computer-based neurocognitive assessment paradigms employing baseline and postconcussion tests. Researchers have reported low test-retest reliability for the Immediate Post Concussion Assessment and Cognitive Testing (ImPACT) across an interval of 45 and 50 days. PURPOSE: To re-examine the test-retest reliability of the ImPACT between baseline, 45 days, and 50 days. STUDY DESIGN: Descriptive laboratory study...
August 2014: American Journal of Sports Medicine
Doug King, Matt Brughelli, Patria Hume, Conor Gissane
BACKGROUND: Sport-related concussions are a subset of mild traumatic brain injuries and are a concern for many sporting activities worldwide. OBJECTIVE: To review and update the literature in regard to the history, pathophysiology, recognition, assessment, management and knowledge of concussion. METHODS: Searches of electronic literature databases were performed to identify studies published up until April 2013. RESULTS: 292 publications focussing on concussion met the inclusion criteria, and so they were quality rated and reviewed...
April 2014: Sports Medicine
Frederick P Rivara, Robert Graham
No abstract text is available yet for this article.
January 15, 2014: JAMA: the Journal of the American Medical Association
Anthony P Kontos, R J Elbin, Vanessa C Fazio-Sumrock, Scott Burkhart, Hasani Swindell, Joseph Maroon, Michael W Collins
OBJECTIVE: To determine the risk of concussion among youth football players (ages 8-12 years). STUDY DESIGN: Participants included 468 male youth football players in western Pennsylvania during the 2011 youth football season. Incidence rates (IRs) and incidence density ratios (IDRs) of concussion were calculated for games and practices and for age groups. RESULTS: There was a total of 11,338 (8415 practice and 2923 game) athletic exposures (AEs) in the study period, during which 20 medically diagnosed concussions occurred...
September 2013: Journal of Pediatrics
Aravind Athiviraham, Adam Bartsch, Prasath Mageswaran, Edward C Benzel, Brian Perse, Morgan H Jones, Mark Schickendantz
BACKGROUND: In Major League Baseball (MLB), helmet hit-by-pitch (H-HBP) incidents are a leading cause of concussion. However, not all H-HBPs result in diagnosed concussion. PURPOSE: This study was designed to (1) quantify batter concussion risk as a function of H-HBP pitch velocity, time duration batter spent on the ground post-H-HBP, first responder assessment time duration, and number of days missed post-H-HBP and (2) estimate H-HBP impact locations on the helmet with respect to current National Operating Committee on Standards for Athletic Equipment (NOCSAE) helmet test standards and correlate impact locations with concussion diagnosis...
December 2012: American Journal of Sports Medicine
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