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Reaction time and concussion

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https://www.readbyqxmd.com/read/28634467/brain-network-activation-technology-does-not-assist-with-concussion-diagnosis-and-return-to-play-in-football-athletes
#1
Steven P Broglio, Richelle Williams, Andrew Lapointe, Ashley Rettmann, Brandon Moore, Sean K Meehan, James T Eckner
BACKGROUND: Concussion diagnosis and management remains a largely subjective process. This investigation sought to evaluate the utility of a novel neuroelectric measure for concussion diagnosis and return to play decision-making. HYPOTHESIS: Brain Network Activation (BNA) scores obtained within 72-h of injury will be lower than the athlete's preseason evaluation and that of a matched control athlete; and the BNA will demonstrate ongoing declines at the return to play and post-season time points, while standard measures will have returned to pre-injury and control athlete levels...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28570092/the-effect-of-physical-exercise-after-a-concussion-a-systematic-review-and-meta-analysis
#2
Avtar Lal, Stephanie A Kolakowsky-Hayner, Jamshid Ghajar, Maya Balamane
BACKGROUND: Data evaluating the role of exercise in patients with a concussion are contradictory. Studies have reported improvement in the Post-Concussion Symptom Scale (PCSS) score, whereas others showed no effect on the PCSS score. PURPOSE: To conduct a systematic review and meta-analysis on the role of physical exercise on different outcomes in patients with a concussion. STUDY DESIGN: Systematic review and meta-analysis. METHODS: A search of 5 databases from the earliest available date to September 30, 2016, and a hand search of a few articles were performed...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28535099/do-sideline-concussion-assessments-predict-subsequent-neurocognitive-impairment-after-sport-related-concussion
#3
Alicia Sufrinko, Jamie McAllister-Deitrick, Melissa Womble, Anthony Kontos
CONTEXT:   Comprehensive, multi-domain assessment is the standard of care after sport-related concussion. However, the relationship between performance on sideline concussion-assessment tools and in-office computerized neurocognitive testing has received little attention, and the prognostic utility of sideline measures is unknown. OBJECTIVE:   To evaluate concurrent impairment on commonly used concussion measures 24 to 48 hours postinjury while also determining the predictive utility of sideline measures on computerized neurocognitive testing in the acute to subacute recovery periods postinjury...
May 23, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28499856/measuring-soldier-performance-during-the-patrol-exertion-multitask-preliminary-validation-of-a-post-concussive-functional-return-to-duty-metric
#4
Matthew Scherer, Margaret M Weightman, Mary Vining Radomski, Laurel Smith, Marsha Finkelstein, Amy Cecchini, Kristin Jensen Heaton, Karen McCulloch
OBJECTIVE: To assess the discriminant validity of the Patrol-Exertion Multitask (PEMT), a novel, multi-domain, functional return-to-duty clinical assessment for Active Duty military personnel. DESIGN: Measurement development study SETTING: Non-clinical indoor testing facility, Fort Bragg NC PARTICIPANTS: 51 healthy control (HC) Service Members and 33 military personnel with persistent post-concussive symptoms receiving rehabilitation (mTBI) INTERVENTION: Not applicable MAIN OUTCOME MEASURES: Known-groups discriminant validity was evaluated by comparing performance on the PEMT in two groups of Active Duty SM, HC and personnel with mTBI residual symptoms...
May 9, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28489656/consequences-of-traumatic-brain-injury-in-professional-american-football-players-a-systematic-review-of-the-literature
#5
Bodil C Vos, Karen Nieuwenhuijsen, Judith K Sluiter
OBJECTIVE: The purpose of this study was to systematically review the literature for the consequences Traumatic brain injury (TBI) has on cognitive, psychological, physical, and sports-related functioning in professional American Football players. DATA SOURCES: We performed a systematic search in 2 databases, PubMed and SPORTDiscus, to obtain literature from January 1990 to January 2015. To be eligible for inclusion, a study had to examine the relationship between TBI and the consequences for several aspects of functioning in professional American football players older than 18 years...
May 9, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28431034/effects-of-sleep-loss-on-subjective-complaints-and-objective-neurocognitive-performance-as-measured-by-the-immediate-post-concussion-assessment-and-cognitive-testing
#6
Ryan P J Stocker, Hassen Khan, Luke Henry, Anne Germain
Objective: This study examined the effects of total and partial sleep deprivation on subjective symptoms and objective neurocognitive performance, as measured by the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) in a sample of healthy adults. Method: One-hundred and two, right-handed, healthy participants (between ages 18 and 30 years old) completed three consecutive nights in the sleep laboratory with concurrent continuous polysomnography monitoring...
May 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28412305/memantine-improves-outcomes-after-repetitive-traumatic-brain-injury
#7
Zhengrong Mei, Jianhua Qiu, Sasha Alcon, Jumana Hashim, Alexander Rotenberg, Yan Sun, William P Meehan, Rebekah Mannix
Repetitive mild traumatic brain injury (rmTBI; e.g., sports concussions) is common and results in significant cognitive impairment. Targeted therapies for rmTBI are lacking, though evidence from other injury models indicates that targeting N-methyl-d-aspartate (NMDA) receptor (NMDAR)-mediated glutamatergic toxicity might mitigate rmTBI-induced neurologic deficits. However, there is a paucity of preclinical or clinical data regarding NMDAR antagonist efficacy in the rmTBI setting. To test whether NMDAR antagonist therapy improves outcomes after rmTBI, mice were subjected to rmTBI injury (4 injuries in 4days) and randomized to treatment with the NMDA antagonist memantine or with vehicle...
April 13, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28236259/a-retrospective-cross-sectional-and-longitudinal-study-of-the-effects-of-age-on-cns-vital-signs-scores-in-high-school-athletes
#8
Sharon D Rogers, Patrick J Smith, Alexandra J Stephenson, D Erik Everhart
INTRODUCTION: Current recommendations for concussion management acknowledge the importance of objective assessments of neuropsychological (NP) ability, and computerized NP assessments have been widely integrated into the concussion management protocols of high schools. The optimal intervals for baseline test administration in high-school athletes are currently uncertain. The ability to accurately detect subtle NP deficits is particularly important for high-school athletes, in which concussions are increasingly recognized for adverse effects to the developing brain...
February 24, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28122770/factor-structure-of-impact%C3%A2-in-adolescent-student-athletes
#9
Paul B Gerrard, Grant L Iverson, Joseph E Atkins, Bruce A Maxwell, Ross Zafonte, Philip Schatz, Paul D Berkner
OBJECTIVE: ImPACT(®) (Immediate Post-Concussion Assessment and Cognitive Testing) is a computerized neuropsychological screening battery, which is widely used to measure the acute effects of sport-related concussion and to monitor recovery from injury. This study examined the factor structure of ImPACT(®) in several samples of high school student athletes. We hypothesized that a 2-factor structure would be present in all samples. METHOD: A sample of 4,809 adolescent student athletes was included, and subgroups with a history of treatment for headaches or a self-reported history of learning problems or attention-deficit hyperactivity disorder were analyzed separately...
February 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28119303/effects-of-sleep-loss-on-subjective-complaints-and-objective-neurocognitive-performance-as-measured-by-the-immediate-post-concussion-assessment-and-cognitive-testing
#10
Ryan P J Stocker, Hassen Khan, Luke Henry, Anne Germain
OBJECTIVE: This study examined the effects of total and partial sleep deprivation on subjective symptoms and objective neurocognitive performance, as measured by the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) in a sample of healthy adults. METHOD: One-hundred and two, right-handed, healthy participants (between ages 18 and 30 years old) completed three consecutive nights in the sleep laboratory with concurrent continuous polysomnography monitoring...
January 23, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28107216/analysis-of-central-and-peripheral-vision-reaction-times-in-patients-with-postconcussion-visual-dysfunction
#11
Joseph F Clark, James K Ellis, Timothy M Burns, John M Childress, Jon G Divine
OBJECTIVE: To determine whether central and peripheral vision reaction times (PVRTs) are prolonged in patients with visual dysfunction after sustaining a concussion. DESIGN: Comparison of Dynavision D2 central and PVRTs in patients with postconcussion visual dysfunction were compared with control data from a normative patient database. Concussion patients without visual dysfunction were not included in this study. SETTING: National Collegiate Athletic Association Division 1 college training room and university based, academic health center...
January 19, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28071936/concussion-baseline-testing-preexisting-factors-symptoms-and-neurocognitive-performance
#12
Jordan E Cottle, Eric E Hall, Kirtida Patel, Kenneth P Barnes, Caroline J Ketcham
CONTEXT: Neurocognitive test scores are often considered an important aspect of concussion management. To best use these data, clinicians must understand potential factors that may influence baseline performance on these tests. OBJECTIVE: To determine preexisting factors that may influence performance on the Immediate Post-Concussion Assessment and Cognitive Test (ImPACT). DESIGN: Cross-sectional study. SETTING: Research laboratory...
February 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/27905859/baseline-neurocognitive-performance-and-clearance-for-athletes-to-return-to-contact
#13
Breton M Asken, James R Clugston, Aliyah R Snyder, Russell M Bauer
CONTEXT:  Computerized neurocognitive assessments are commonly used to manage sport-related concussion. Variations in baseline performance may influence neurocognitive performance after injury as well as the amount of time needed for an athlete to be cleared for return to sport participation. OBJECTIVE:  To investigate the relationship between mean baseline Immediate Post-Concussion Assessment and Cognitive Test (ImPACT) scores and postconcussion reliable decline as well as the association between postconcussion cognitive decline and days missed after injury...
January 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/27855264/acute-effects-of-near-infrared-light-therapy-on-brain-state-in-healthy-subjects-as-quantified-by-qeeg-measures
#14
Fred Grover, Jon Weston, Michael Weston
OBJECTIVE: Recent investigation suggests that near infrared (NIR) light may improve symptoms from mild traumatic brain injury. In addition, quantitative electroencephalography (qEEG) has shown measures correlating with concussion: P300, reaction time, and amplitude. The objective of this study was to determine whether NIR light treatment has an acute effect on brain state in healthy patients as measured by EEG. METHODS: A total of 31 healthy volunteers, between the ages of 14 and 65, underwent qEEG event-related response tests before and after a 20-min NIR light head treatment...
March 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/27747793/a-preliminary-study-of-the-effectiveness-of-an-allostatic-closed-loop-acoustic-stimulation-neurotechnology-in-the-treatment-of-athletes-with-persisting-post-concussion-symptoms
#15
Charles H Tegeler, Catherine L Tegeler, Jared F Cook, Sung W Lee, Lee Gerdes, Hossam A Shaltout, Christopher M Miles, Sean L Simpson
BACKGROUND: Effective interventions are needed for individuals with persisting post-concussion symptoms. High-resolution, relational, resonance-based, electroencephalic mirroring (HIRREM®) is an allostatic, closed-loop, acoustic stimulation neurotechnology, designed to facilitate relaxation and self-optimization of neural oscillations. METHODS: Fifteen athletes (seven females, mean age 18.1 years, SD 2.6) with persisting post-concussion symptoms received 18.7 (SD 6...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27736285/comparison-of-baseline-and-post-concussion-impact-test-scores-in-young-athletes-with-stimulant-treated-and-untreated-adhd
#16
Ryan M Gardner, Aaron Yengo-Kahn, Christopher M Bonfield, Gary S Solomon
OBJECTIVES: Baseline and post-concussion neurocognitive testing is useful in managing concussed athletes. Attention deficit hyperactivity disorder (ADHD) and stimulant medications are recognized as potential modifiers of performance on neurocognitive testing by the Concussion in Sport Group. Our goal was to assess whether individuals with ADHD perform differently on post-concussion testing and if this difference is related to the use of stimulants. METHODS: Retrospective case-control study in which 4373 athletes underwent baseline and post-concussion testing using the ImPACT battery...
February 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/27561090/comparison-of-neuropsychological-test-scores-of-high-school-athletes-in-high-and-low-contact-sports-a-replication-study
#17
William T Tsushima, Andrea M Siu, Nozomi Yamashita, Ross S Oshiro, Nathan M Murata
This replication study re-examined the neuropsychological effects of participation in high and low contact youth sports. Modeled after a recently published investigation, two contact sport groups of participants ages 12 to 18 were formed based on the rate of concussion in their respective sport, with the assumption that more head impacts and neuropsychological effects occur in high contact sports that have a greater number of reported concussions as compared with low contact sports. The preseason baseline ImPACT neuropsychological test scores and symptom scores of non-concussed youth athletes in a High Contact Sport (football, n = 139) and a Low Contact Sport (basketball, baseball, soccer, wrestling, volleyball, paddling, and cheerleading, n = 57) were compared...
August 25, 2016: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/27558141/a-comparison-of-cognitive-function-in-former-rugby-union-players-compared-with-former-non-contact-sport-players-and-the-impact-of-concussion-history
#18
Patria A Hume, Alice Theadom, Gwyn N Lewis, Kenneth L Quarrie, Scott R Brown, Rosamund Hill, Stephen W Marshall
AIM: This study investigated differences in cognitive function between former rugby and non-contact-sport players, and assessed the association between concussion history and cognitive function. METHODS: Overall, 366 former players (mean ± standard deviation [SD] age 43.3 ± 8.2 years) were recruited from October 2012 to April 2014. Engagement in sport, general health, sports injuries and concussion history, and demographic information were obtained from an online self-report questionnaire...
August 24, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27525174/utilization-of-impact-testing-to-measure-injury-risk-in-alpine-ski-and-snowboard-athletes
#19
John Faltus, Brittney Huntimer, Thomas Kernozek, John Cole
BACKGROUND: While studies that have examined the prevalence of musculoskeletal injuries in alpine skiing and snowboarding exist, there has been no discussion of how neurocognitive deficits may influence such injuries. Recent authors have identified a possible link between Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) testing results and the prevalence of musculoskeletal injury in athletic populations. However, no study has specifically examined this in the alpine skiing and snowboard athletes who sustain injury and those that do not...
August 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27501359/lower-extremity-stiffness-changes-after-concussion-in-collegiate-football-players
#20
Dominique F Dubose, Daniel C Herman, Deborah L Jones, Susan M Tillman, James R Clugston, Anthony Pass, Jorge A Hernandez, Terrie Vasilopoulos, Marybeth Horodyski, Terese L Chmielewski
PURPOSE: Recent research indicates that a concussion increases the risk of musculoskeletal injury. Neuromuscular changes after concussion might contribute to the increased risk of injury. Many studies have examined gait postconcussion, but few studies have examined more demanding tasks. This study compared changes in stiffness across the lower extremity, a measure of neuromuscular function, during a jump-landing task in athletes with a concussion (CONC) to uninjured athletes (UNINJ). METHODS: Division I football players (13 CONC and 26 UNINJ) were tested pre- and postseason...
January 2017: Medicine and Science in Sports and Exercise
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