Management Of Sport-related Concussion Research Articles

An Interdisciplinary Approach to Sports Concussion Evaluation and Management: The Role of a Neuropsychologist.

Sports neuropsychology is a rapidly emerging field that affords neuropsychologists, the opportunity to work with a diverse group of individuals in terms of age, gender, sports, ethnicity, and language and sports has a way of bringing diverse communities together. Although working with athletes can be associated with unique challenges, neuropsychological assessment with this population and being part of an interdisciplinary sports medicine team is both exciting and rewarding and can merge a passion for sports with professional interests. This paper is intended to highlight the contribution of neuropsychology to the evaluation and management of sport-related concussion as well as describe the neuropsychologist's role as an integral member of interdisciplinary sports medicine teams. Clinical model, special considerations, assessment strategy, and administrative aspects of practice are discussed.

Assessment and Management of Sport-Related Concussion Teaching Trends in Athletic Training Programs

Context: Previous research suggests that health care providers, in general, are not adequately trained in sport-related concussion (SRC) recognition and management. However, it is unclear if athletic training educators are instructing athletic training students on evidence-based SRC assessment and management protocols. Objective: To examine and identify which SRC resources and management tools are being used to teach and prepare athletic training students to clinically evaluate and manage SRCs. Design: Cross-sectional study. Setting: Single Web-based survey. Patients or Other Participants: One hundred two athletic training educators. Main Outcome Measure(s): Survey questions collected education level, years of experience as an athletic trainer, sex, role within the athletic training program, and the type of athletic training program at their institution. Participants were asked which position statement or consensus statement was used to teach SRC and, finally, which SRC management tools were taught to students in regard to SRC evaluation, management, and return to play. Results: Respondents have been certified athletic trainers for an average of 17.9 ± 6.5 years and accumulated a mean of 9.9 ± 6.8 years of clinical experience before transitioning into educational roles. Among the respondents to the survey, 99% of educators are using the National Athletic Trainers' Association position statement to teach SRC. The clinical examination (100%) was the most widely taught evaluation tool among respondents. Out of all the respondents, over 80% of educators are teaching clinical use and application of the Sport Concussion Assessment Tool 3, Balance Error Scoring System, and computerized neurocognitive testing; however, only 71% are teaching the stepwise progression, and less than 30% are teaching newer tools documented in SRC literature. Conclusions: Educators are following recommended practices of teaching a multifaceted approach to SRC evaluation and management. However, instruction is lacking on the use of a stepwise return-to-play progression and newer SRC management tools that assess vestibular and ocular-motor impairment.

The Berlin International Consensus Meeting on Concussion in Sport

The Fifth International Conference on Concussion in Sport was held in Berlin in October 2016. A series of 12 questions and subquestions was developed and the expert panel members were required to perform a systematic review to answer each question. Following presentation at the Berlin meeting of the systematic review, poster abstracts and audience discussion, the summary Consensus Statement was produced. Further, a series of tools for the management of sport-related concussion was developed, including the Sport Concussion Assessment Tool Fifth edition (SCAT5), the Child SCAT5, and the Concussion Recognition Tool Fifth edition. This paper elaborates on this process, the outcomes, and explores the implications for neurosurgeons in the management of sport-related concussion.

Concussion: A Window Into Brain–Movement Relations in Motor Control

Research into sports-related concussion (SRC) or brain injury has vastly expanded our knowledge of the connection between brain activity and behavioral outcomes. Historical examination of concussion reveals components of structural changes in the brain resulting from injury. A constellation of clinical symptoms is typically present following concussion for several days and weeks. However, the intersection of structural changes and clinical examination still remains elusive to medical professionals. With emerging technologies and modalities such as quantitative electroencephalography (EEG), functional magnetic resonance imaging (fMRI), virtual reality (VR), and the study of movement, we can better understand the brain–behavior relationship on clinical findings post-injury. Our advancement in SRC study using athletics provides a unique window into the advances in our ability to study this public health crisis. SRC also allows us to understand how athletics and exercise influence brain health. The evolution of SRC diagnosis, treatment, and management informs our current abilities in the study of the brain.

脳振盪・スポーツ頭部外傷の検査と対応

脳振盪・スポーツ頭部外傷の検査と対応

A review of sideline assessment measures for identifying sports-related concussion

Currently, there is a lack of clear, “gold standard” guidelines for the identification and management of sports-related concussion. This is of concern considering the importance of preventing further injury during game-play. Moreover, a number of assessment measures and tools aim to detect concussion in athletes and help inform return to play decisions, including the assessment of posture and balance, eye-saccades, memory, attention, orientation and post-concussive symptomatology. However, they have often not been widely disseminated for validity studies, and their utility or sensitivity in detecting concussion is limited due to a number of factors. As such, this review will examine current guidelines and sideline assessments measures which aim to inform decisions about return to play following sports-related concussion.

Chapter 14 - Vestibular dysfunction and concussion

The assessment and treatment of sport-related concussion (SRC) often requires a multifaceted approach. Vestibular dysfunction represents an important profile of symptoms and pathology following SRC, with high prevalence and association with prolonged recovery. Signs and symptoms of vestibular dysfunction may include dizziness, vertigo, disequilibrium, nausea, and visual impairment. Identifying the central and peripheral vestibular mechanisms responsible for pathology can aid in management of SRC. The most common vestibular disturbances after SRC include benign paroxysmal positional vertigo, vestibulo-ocular reflex impairment, visual motion sensitivity, and balance impairment. A variety of evidence-based screening and assessment tools can help to identify the various types of vestibular pathology in SRC. When vestibular dysfunction is identified, there is emerging support for applying targeted vestibular rehabilitation to manage this condition.

Chapter 2 - Sports neurology as a multidisciplinary field

A multidisciplinary approach within sports neurology fills a critical role in the management of athletes with neurologic injury. This model promotes streamlined access to sports medicine providers who can offer high-quality multispecialty care in a collaborative manner, to provide optimal outcomes for athletes. This chapter highlights the rise of the multidisciplinary care approach in nonathletic healthcare settings and introduces the concept of the interdisciplinary sports medicine care model. Next, we review the roles of medical providers who are integral in effective management of sport-related concussion, followed by a discussion of the athletic healthcare teams that treat other sport-related neurologic injuries and athletes with pre-existing neurologic conditions. Finally, we note important educational, legal, and independent medical care issues in athletic healthcare settings, and summarize the applicability of multidisciplinary and interdisciplinary care models to the subspecialty of sports neurology.

Sport-related concussive convulsions: a systematic review

ABSTRACTObjectives: The incidence of sport-related concussion (SRC) continues to rise. Presentations of concussed athletes vary from subtle symptoms to notable signs. Between the 4th and 5th iterations of the Concussion in Sport Group (CISG) guidelines, concussive convulsions were removed as a modifying factor, but little evidence or discussion supported this change. While considerable research exists regarding post-traumatic epilepsy in moderate to severe traumatic brain injury, convulsions following SRC are relatively understudied. There is no clear consensus on the prevalence of convulsions, seizures, or the management of these entities following SRC. The aim of this review was to assess the state of the literature, describe the management trends of concussive convulsions and post-traumatic epilepsy in the SRC population, and provide evidence and guidance for the management of these athletes.Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were adapted for a review of heterogeneous literature. English-language titles and abstracts published prior to June 2017 were searched systematically across four electronic databases. Primary peer-reviewed journal articles were included if they reported individuals of any age or gender who suffered a concussion or mild traumatic brain injury that was associated with seizure activity during a sports/recreational event.Results: Of 852 records screened for review, 58 full-text articles were assessed for eligibility. Eight studies with 130 athletes total met the inclusion criteria. Of these individuals suffering a SRC convulsion or a post-concussive seizure, 0.8% received antiepileptic medications, 24.6% underwent electroencephalography, and 30.8% underwent brain imaging. The mean time until the participant returned to play was 14.8 days. Only 6.9% developed long-term sequelae over a mean follow-up time of 3.3 years.Conclusions: The current literature describing concussive convulsions and post-concussion seizure in sports is limited. A void of primary literature concerning the management of patients with concussive convulsions or seizures and the long-term sequelae among this population remains. However, the evidence available suggests that concussive convulsions do not need to be a primary modifying factor in the management of SRC.

Sports-Related Concussion in School-Age Children

Viewed through the lens of public health, sports-related concussion or mild traumatic brain injury is an epidemic health problem. This paper commences with a scoping review of sport-related concussion and mild traumatic brain injury considering its historical background, clinical definitions, epidemiology, and pathophysiology and treatment. The second section assesses the complex interplay of intrapersonal and interpersonal, community, and societal factors that influence sport-related concussion and mild traumatic brain injury. The third section concludes with recommendations for policy changes and further research to mitigate the health impact of sports-related concussion in adolescent school-age children. The optimal management of sports-related concussion requires care going beyond the acute injury, and into the school setting to maximize their academic and social outcomes. This is more likely to occur when healthcare and educational systems are optimally coordinated.

Review of Assessment Scales for Diagnosing and Monitoring Sports-related Concussion.

Sports-related concussion has emerged as a public health crisis due to increased diagnosis of the condition and increased participation in organized and recreational athletics worldwide. Under-recognition of concussions can lead to premature clearance for athletic participation, leaving athletes vulnerable to repeat injury and subsequent short- and long-term complications. There is overwhelming evidence that assessment and management of sports-related concussions should involve a multifaceted approach. A number of assessment criteria have been developed for this purpose. It is important to understand the available and emerging diagnostic testing modalities for sports-related concussions. The most commonly used tools for evaluating individuals with concussion are the Post-Concussion Symptom Scale (PCSS), Standard Assessment of Concussion (SAC), Standard Concussion Assessment Tool (SCAT3), and the most recognized computerized neurocognitive test, the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT). The strengths and limitations of each of these tools, and the Concussion Resolution Index (CRI), CogSport, and King-Devick tests were evaluated. Based on the data, it appears that the most sensitive and specific of these is the ImPACT test. Additionally, the King-Devick test is an effective adjunct due to its ability to test eye movements and brainstem function.

Effects of the New York State Concussion Management and Awareness Act (“Lystedt Law”) on Concussion-Related Emergency Health Care Utilization Among Adolescents, 2005-2015

Background: All states have enacted legislation addressing the management of sports-related concussions (SRCs) in adolescent athletes. The effect of these laws on health care utilization is uncertain. Hypothesis/Purpose: The purpose was to evaluate the effects of New York’s 2011 Concussion Management and Awareness Act (“Lystedt Law”) on emergency department (ED) concussion health care visits (EDCHVs) and brain imaging utilization. It was hypothesized that New York concussion legislation would have a significant temporal effect on EDCHVs. Study Design: Descriptive epidemiology study. Methods: Using the New York State Department of Health Statewide Planning and Research Cooperative System (SPARCS) database, trends in EDCHVs from 2005 to 2015 were identified among 12- to 18-year-old patients, comprising 5,740,403 total ED visits. Results: Overall, 208,024 EDCHVs, including 54,669 for an SRC, occurred during the study period. EDCHVs increased from 13,664 (2.74% of all ED visits) in 2005 to a peak of 21,374 (4.26%) in 2013, with greatest relative increases from 2008 to 2013. SRCs followed a similar trend: 3213 (0.64%) in 2005 to a peak of 6197 (1.24%) in 2013. Brain imaging utilization decreased by 5.3% for EDCHVs and 15.4% for SRCs (all comparisons year-by-year and for trends; P < .001). Conclusion: The period of greatest increases in EDCHVs and decreases in brain imaging utilization for SRCs preceded New York concussion legislation by several years, suggesting a minimal direct effect on emergency care–seeking behavior for concussions. Instead, increased public awareness of SRCs and imaging guidelines may have driven EDCHV trends and imaging practices.

Psychological, situational and lifestyle factors that influence the reporting of postconcussion-like symptoms

Background: The assessment and management of sports-related concussion relies on self-reporting of symptoms (SRS) by the concussed athlete. However, symptoms associated with concussion are non-specific in nature and symptom scores might not accurately reflect an athlete's neurological status as psychological, situational and lifestyle factors are thought to influence symptom reporting. In order to better understand whether symptoms associated with a concussion are a true reflection of the underlying pathology or a normal response to daily stressors and health status it is important to evaluate postconcussion-like symptoms in non-concussed populations to determine normal day-to-day variability, serial reporting of symptoms, as well as the effect of lifestyle and psychological factors. Understanding these influences will lead to a better understanding of the assessment and management of concussion in athletes.

Evaluation and management of sport-related concussions in adolescent athletes.

Sport-related concussions in young athletes are common, generally under reported and often go unrecognized. Concussion in sport may result either from a direct impact to the head or from indirect forces transmitted to the brain from impact elsewhere on the body. Concussions may also result from sudden acceleration, deceleration or rotational forces to the brain. The key features of concussion include confusion, impaired memory and reduced speed of information processing. Recovery may occur from a few days to several weeks or months. Both physical and cognitive rests are recommended for recovery. Long-term cognitive and behavioral complications are a concern. Preventive strategies include education, modification of sport rules, use of equipment such as headgears, face masks and mouth guards, and neck muscle training. Evidence is limited to support effectiveness of these preventive measures with the exception of rule modification in some sports. Laws have been enacted that require medical evaluation and clearance prior to return to play; however, evidence thus far does not show that laws have been effective in reducing the incidence of concussions in sport. More research is needed in all areas of preventive measures. Sports participation is a complex personal decision on the part of adolescent and his or her family. They should be provided with all information on inherent risks so that they can make an informed decision.

Abstracts from The 35th Annual National Neurotrauma Symposium July 7-12, 2017 Snowbird, Utah.

Abstracts from The 35th Annual National Neurotrauma Symposium July 7-12, 2017 Snowbird, Utah.

Establishment of Normative Clinical Reaction Times in a Pediatric Population

INTRODUCTION: The puck-drop (PD) test has been utilized to assess clinical reaction time (CRT) and has been proposed as a tool to aid in the management of sports related concussion. The simplicity of the test and low cost make it an attractive tool in the management of these injuries; however, no normative data has been established in children, making post-concussion testing in this population difficult to interpret. PURPOSE: The purpose of this study is to examine the use of the PD test in the pediatric and adolescent population: 1) to develop age specific normative values and 2) to examine the effect of sex and handedness on test performance. METHODS: Patients (ages 8-18) who presented to sports medicine clinics for evaluation and treatment of non-concussive injuries and whose presenting complaint would not confound completion of the PD test (LE injury, recovered injury, etc.) were recruited for baseline assessment. Testing was conducted in accordance to protocols previously described in the literature. Two practice trials were conducted. The distance of stick transversal was recorded to the nearest 0.5 cm, as well as the number of drops and failed attempts. The test was completed when 8 successful trials for each hand were recorded. Children with hands too small to circumvent the puck diameter were accommodated by starting at 10 cm above the puck base at the discretion of the test administrator. RESULTS: 463 subjects completed the study (n = 178 male, n = 285 female, average age 13.04 +/- 2.57 years). Regression analysis of baseline CRT indicated a strong effect of age on overall CRT for both right and left hands (R2 = 0.21, p < 0.001, Figure 1). The estimates (SE) of right hand CRT ranged between 255.51 (4.66) to 216.15 (4.97) ms, and those of left hand ranged from 257.41 (4.71) to 219.08 (5.02) ms across 8-18 years of age. There were no differences in performance on CRT based on handedness (p = 0.78) or sex. (p = 0.84). CONCLUSION: As a result of this study, normative values for the PD test were established for the pediatric population. Test performance varied with age. Test performance did not vary based on hand, preliminarily indicating hand dominance does not affect performance during this evaluation, Future studies should evaluate the effect of concussion on performance.

Longitudinal Assessment of Health-Related Quality of Life following Adolescent Sports-Related Concussion

To examine initial and longitudinal health-related quality of life (HRQOL) in adolescent sports-related concussion (SRC) patients, a prospective observational case-series study was conducted among adolescent SRC patients who were evaluated at a multi-disciplinary pediatric concussion program. Health-related quality of life was measured using the child self-report Pediatric Quality of Life Inventory (PedsQL) generic score scale (age 13-18 version) and the PedsQL Cognitive Functioning scale. Initial and longitudinal HRQOL outcomes were compared between patients who did and did not develop post-concussion syndrome (PCS). A total of 63 patients met the inclusion criteria during the study period. The mean age of the cohort was 14.57 years (standard deviation, 1.17) and 61.9% were male. The median time from injury to initial consultation was 6.5 days (interquartile range, 5, 11). At initial consultation, impairments in physical and cognitive HRQOL but not social or emotional HRQOL were observed. Initial symptom burden and length of recovery were associated with greater impairment in physical and cognitive HRQOL. Patients who went on to develop PCS had significantly worse physical and cognitive HRQOL at initial consultation and demonstrated a slower rate of recovery in these domains, compared with those who recovered in less than 30 days. Adolescent SRC was associated with HRQOL impairments that correlated with clinical outcomes. No persistent impairments in HRQOL were detected among patients who achieved physician-documented clinical recovery. Future studies are needed to evaluate the clinical utility of HRQOL measurement in the longitudinal management of adolescent SRC and PCS patients.

Acute white matter changes following sport-related concussion: A serial diffusion tensor and diffusion kurtosis tensor imaging study.

Recent neuroimaging studies have suggested that following sport-related concussion (SRC) physiological brain alterations may persist after an athlete has shown full symptom recovery. Diffusion MRI is a versatile technique to study white matter injury following SRC, yet serial follow-up studies in the very acute stages following SRC utilizing a comprehensive set of diffusion metrics are lacking. The aim of the current study was to characterize white matter changes within 24 hours of concussion in a group of high school and collegiate athletes, using Diffusion Tensor and Diffusion Kurtosis Tensor metrics. Participants were reassessed a week later. At 24 hours post-injury, the concussed group reported significantly more concussion symptoms than a well-matched control group and demonstrated poorer performance on a cognitive screening measure, yet these differences were nonsignificant at the 8-day follow-up. Similarly, within 24-hours after injury, the concussed group exhibited a widespread decrease in mean diffusivity, increased axial kurtosis and, to a lesser extent, decreased axial and radial diffusivities compared with control subjects. At 8 days post injury, the differences in these diffusion metrics were even more widespread in the injured athletes, despite improvement of symptoms and cognitive performance. These MRI findings suggest that the athletes might not have reached full physiological recovery a week after the injury. These findings have significant implications for the management of SRC because allowing an athlete to return to play before the brain has fully recovered from injury may have negative consequences. Hum Brain Mapp 37:3821-3834, 2016. © 2016 Wiley Periodicals, Inc.

Graded aerobic treadmill testing in pediatric sports-related concussion: safety, clinical use, and patient outcomes.

OBJECTIVE The objectives of this study were 2-fold: 1) to evaluate the safety, tolerability, and clinical use of graded aerobic treadmill testing in pediatric patients with sports-related concussion (SRC), and 2) to evaluate the clinical outcomes of treatment with a submaximal aerobic exercise program in patients with physiological post-concussion disorder (PCD). METHODS The authors conducted a retrospective chart review of pediatric patients (age < 20 years) with SRC who were referred to a multidisciplinary pediatric concussion program and underwent graded aerobic treadmill testing between October 9, 2014, and February 11, 2016. Clinical assessments were carried out by a single neurosurgeon and included clinical history taking, physical examination, and recording specific patient-reported concussion-related symptoms using the Post-Concussion Symptom Scale (PCSS). Graded aerobic treadmill testing using a modified Balke protocol for incremental increases in intensity was used as a diagnostic tool to assess physiological recovery, classify post-concussion syndrome (PCS) subtype, and reassess patients following treatment. Patients with a symptom-limited threshold on treadmill testing (physiological PCD) were treated with an individually tailored submaximal exercise prescription and multidisciplinary targeted therapies. RESULTS One hundred six patients (mean age 15.1 years, range 11-19 years) with SRC underwent a total of 141 treadmill tests. There were no serious complications related to treadmill testing in this study. Overall, 138 (97.9%) of 141 tests were well tolerated and contributed valuable clinical information. Treadmill testing confirmed physiological recovery in 63 (96.9%) of 65 patients tested, allowing successful return to play in 61 (93.8%). Treadmill testing was used to diagnose physiological PCD in 58 patients and cervicogenic PCD in 1 patient. Of the 41 patients with physiological PCD who had complete follow-up and were treated with tailored submaximal exercise prescription, 37 (90.2%) were classified as clinically improved and 33 (80.5%) successfully returned to sporting activities. Patients who did not respond or experienced an incomplete response to submaximal aerobic exercise treatment included 7 patients with migraine headaches and 1 patient with a postinjury psychiatric disorder. CONCLUSIONS Graded aerobic treadmill testing is a safe, tolerable, and clinically valuable tool that can assist in the evaluation and management of pediatric SRC. Future research is needed to confirm the clinical value of this tool in return-to-play decision making. Studies are also needed to understand the pathophysiology of physiological PCD and the effects of targeted treatment.

Concussion Management Practice Patterns Among Sports Medicine Physicians.

The primary purpose of this study was to examine concussion management practice patterns among sports medicine physicians in the United States. Cross-sectional study using a web-based survey. Members of the American Medical Society for Sports Medicine (AMSSM). We distributed a questionnaire to physician members of the AMSSM assessing the current practices for evaluating and managing concussions sustained during sports. Specifically, we asked respondents about their use of management guidelines, medications, balance assessments, neuropsychological tests, and return-to-play strategies. Of the 3591 members emailed, 425 (11.8%) respondents responded. Ninety-seven percent of respondents reported basing current management of sport-related concussion on a published set of criteria, with a majority (91.9%) following the guidelines provided by the Fourth International Conference on Concussion in Sport. Seventy-six percent of respondents reported using medication beyond 48 hours postinjury. Acetaminophen was reported as the most commonly administered medication, although tricyclic antidepressants and amantadine were also commonly administered. Vitamins, minerals, and dietary supplements were also reported as commonly administered. Most respondents reported using a form of neuropsychological testing (87.1%). A majority of respondents (88.6%) reported allowing athletes to return to competition after concussion only once the athlete becomes symptom free and completes a return-to-play protocol. Most sports medicine physicians seem to use recently developed guidelines for concussion management, regularly use medications and neuropsychological testing in management strategies, and follow established return-to-play guidelines. Sports medicine physicians seem to have clinical expertise in the management of sport-related concussion.