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https://www.readbyqxmd.com/read/28637118/asymptomatic-chiari-type-i-malformation-should-patients-be-advised-against-participation-in-contact-sports
#1
Robert Spencer, Paul Leach
BACKGROUND: Chiari type I malformation (CM-I) is characterised by caudal displacement of the cerebellar tonsils through the foramen magnum, crowding the craniocervical junction. It is being increasingly diagnosed in asymptomatic patients due to the widespread availability of MRI, and there are case reports of these patients suffering sudden death or neurological injury following head or neck trauma, raising the issue of whether they should be prohibited from contact sport participation, given the likelihood of frequent trauma...
March 2, 2017: British Journal of Neurosurgery
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
#2
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/28631965/short-term-test-retest-reliability-of-the-impact-in-healthy-young-athletes
#3
Amanda M O'Brien, Joseph E Casey, Rachel M Salmon
The present study examined the short-term test-retest reliability of the Immediate Post-concussion Assessment and Cognitive Testing (ImPACT) variables with healthy 11- to 14-year-old athletes. 53 young athletes (Mage = 12.4 years, 9 female) were administered the ImPACT on two separate occasions two weeks apart. Participants were instructed to complete the Post-Concussion Symptom Scale (PCSS) and the baseline computerized neurocognitive test during both the baseline and retest phases. Intraclass correlation (ICC), standard error of measurement (SEM), and reliable change index (RCI) were used as reliability metrics...
February 22, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28604837/dynamic-changes-in-diffusion-measures-improve-sensitivity-in-identifying-patients-with-mild-traumatic-brain-injury
#4
Alexander W Thomas, Richard Watts, Christopher G Filippi, Joshua P Nickerson, Trevor Andrews, Gregory Lieberman, Magdalena R Naylor, Margaret J Eppstein, Kalev Freeman
The goal of this study was to investigate patterns of axonal injury in the first week after mild traumatic brain injury (mTBI). We performed a prospective cohort study of 20 patients presenting to the emergency department with mTBI, using 3.0T diffusion tensor MRI immediately after injury and again at 1 week post-injury. Corresponding data were acquired from 16 controls over a similar time interval. Fractional anisotropy (FA) and other diffusion measures were calculated from 11 a priori selected axon tracts at each time-point, and the change across time in each region was quantified for each subject...
2017: PloS One
https://www.readbyqxmd.com/read/28583462/decreased-anticipatory-postural-adjustments-during-gait-initiation-acutely-post-concussion
#5
Thomas A Buckley, Jessie R Oldham, Barry A Munkasy, Kelsey E Evans
OBJECTIVE: The purpose of this study was to investigate anticipatory postural adjustments (APA) during the transitional movement task of gait initiation (GI) in individuals acutely following a concussion. DESIGN: Cohort Study. SETTING: University Research Center. PARTICIPANTS: A population based sample of 84 participants divided into two equal groups of acutely post-concussion (CONC) and healthy student athletes. INTERVENTION: Participants were tested on two occasions - a pre-injury baseline test and then the CONC group was retested acutely post-concussion and the control group again at a similar time...
June 2, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28579327/manipulating-cognitive-reserve-pre-injury-environmental-conditions-influence-the-severity-of-concussion-symptomology-gene-expression-and-response-to-melatonin-treatment-in-rats
#6
Glenn R Yamakawa, Sabrina Salberg, Karen M Barlow, Brian L Brooks, Michael J Esser, Keith Owen Yeates, Richelle Mychasiuk
In an effort to understand the factors that contribute to heterogeneity in outcomes often associated with mTBI in youth, this study examined the role of premorbid differences in cognitive reserve on post-concussive symptoms (PCS), molecular markers, and treatment response. Male and female rats matured in one of three environmental conditions (Stress, Enrichment, Control), received a mTBI in adolescence, and were randomized to melatonin or placebo treatment. All animals underwent a behavioural test battery designed to examine PCS...
June 1, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28570092/the-effect-of-physical-exercise-after-a-concussion-a-systematic-review-and-meta-analysis
#7
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/28560540/post-traumatic-headache-the-use-of-the-sport-concussion-assessment-tool-scat-3-as-a-predictor-of-post-concussion-recovery
#8
Olivia Begasse de Dhaem, William B Barr, Laura J Balcer, Steven L Galetta, Mia T Minen
BACKGROUND: Given that post-traumatic headache is one of the most prevalent and long-lasting post-concussion sequelae, causes significant morbidity, and might be associated with slower neurocognitive recovery, we sought to evaluate the use of concussion screening scores in a concussion clinic population to assess for post-traumatic headache. METHODS: This is a retrospective cross-sectional study of 254 concussion patients from the New York University (NYU) Concussion Registry...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28559757/validation-of-the-optogait-system-for-monitoring-treatment-and-recovery-of-post-concussion-athletes
#9
Melissa A Engelson, Richard Bruns, Christopher J Nightingale, Kevin M Bardwell, Craig A Mason, Shihfen Tu, Laney Nelson, Stephen A Butterfield
OBJECTIVE: This study sought to investigate correlations between OptoGait motion analysis technology and 2 commonly used concussion assessment instruments, the Balance Evaluation Scoring System (BESS) and the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) computerized neurocognitive assessment software, to see if OptoGait might be a valid concussion assessment tool. METHODS: Twenty Division-1 college women varsity soccer players completed trials of 8 different conditions of the OptoGait test battery...
June 2017: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/28541413/the-influence-of-the-apolipoprotein-e-apoe-gene-on-subacute-post-concussion-neurocognitive-performance-in-college-athletes
#10
Victoria C Merritt, Amanda R Rabinowitz, Peter A Arnett
Objective: The purpose of this study was to determine whether the ε4 allele of the APOE gene influences neurocognitive outcome following sports-related concussion. It was hypothesized that participants with an ε4 allele would show poorer neurocognitive performance and greater neurocognitive variability than those without an ε4 allele. Method: Participants included 57 concussed collegiate athletes (77.2% male) who participated in a concussion management program at a large university...
May 24, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28540448/sensor-based-balance-measures-outperform-modified-balance-error-scoring-system-in-identifying-acute-concussion
#11
Laurie A King, Martina Mancini, Peter C Fino, James Chesnutt, Clayton W Swanson, Sheila Markwardt, Julie C Chapman
Balance assessment is an integral component of concussion evaluation and management. Although the modified balance error scoring system (mBESS) is the conventional clinical tool, objective metrics derived from wearable inertial sensors during the mBESS may increase sensitivity in detecting subtle balance deficits post-concussion. The aim of this study was to identify which stance condition and postural sway metrics obtained from an inertial sensor placed on the lumbar spine during the mBESS best discriminate athletes with acute concussion...
May 24, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28540042/factors-affecting-the-concussion-knowledge-of-athletes-parents-coaches-and-medical-professionals
#12
Michael D Cusimano, Stanley Zhang, Jane Topolovec-Vranic, Michael G Hutchison, Rowan Jing
OBJECTIVES: To determine the predictors of knowledge and awareness of concussion symptoms and outcomes through a survey of athletes, parents of players and coaches in sports settings in Canada. METHODS: A cross-sectional survey of athletic communities in Canada was conducted. Respondents' concussion knowledge score consists of responses to questions about the symptoms, diagnosis, and treatment of a concussion and the timing of return-to-sport post-concussion. The percentage of correct responses was defined as the "identification rate...
2017: SAGE Open Medicine
https://www.readbyqxmd.com/read/28537493/the-relationship-between-cerebral-vasoreactivity-and-post-concussive-symptom-severity
#13
Tamadher Albalawi, Jason W Hamner, Matthew Lapointe, William Meehan, Can Ozan Tan
While pathophysiology underlying post-concussion symptom burden is unknown, data suggest that cerebrovascular dysfunction may be among the culprits. We sought to determine whether the degree of impairment in the ability of cerebrovasculature to buffer against changes in arterial gases (vasoreactivity) is associated with concussion symptoms. In 15 participants (19±5 years, 1 week to 1 year post-injury) diagnosed with concussion, we assessed vasoreactivity from the slope of the linear relationship of beat-by-beat middle cerebral artery blood flow velocity (transcranial Doppler ultrasound) to end-tidal CO<sub>2</sub> during progressive increases in end-tidal CO<sub>2</sub> (air rebreathing)...
May 24, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28535099/do-sideline-concussion-assessments-predict-subsequent-neurocognitive-impairment-after-sport-related-concussion
#14
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/28520668/structural-connectivity-related-to-persistent-symptoms-after-mild-tbi-in-adolescents-and-response-to-aerobic-training-preliminary-investigation
#15
Weihong Yuan, Shari L Wade, Catherine Quatman-Yates, Jason A Hugentobler, Paul J Gubanich, Brad G Kurowski
OBJECTIVE: To quantify structural connectivity abnormalities in adolescents with mild traumatic brain injury (mTBI) and to investigate connectivity changes following aerobic training using graph theory and diffusion tensor imaging tractography. SETTING: Outpatient research setting. PARTICIPANTS: Twenty-two children (age: 15.83 ± 1.77 years, 10 females) with 4 to 16 weeks of persistent symptoms after mTBI and a matched healthy comparison group...
May 17, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28520665/family-history-of-migraine-associated-with-posttraumatic-migraine-symptoms-following-sport-related-concussion
#16
Alicia Sufrinko, Jamie McAllister-Deitrick, R J Elbin, Michael W Collins, Anthony P Kontos
OBJECTIVE: To determine whether family history of migraine increased the likelihood of posttraumatic migraine (PTM) symptom presentation in adolescents following concussion, and examine the influence of family history of migraine and PTM on postinjury outcomes. SETTING: Outpatient concussion clinic. PARTICIPANTS: A total of 153 patients with concussion (103 males and 50 females) aged 15.72 ± 1.48 years (range 12-18 years). DESIGN: Cross-sectional, observational study of patients presenting for initial evaluation 4...
May 17, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28515977/establishing-normative-change-values-in-visual-acuity-loss-during-the-dynamic-visual-acuity-test
#17
Chris Marquez, Monica Lininger, Scot Raab
BACKGROUND: Baseline visual acuity (VA) loss from static to dynamic head conditions assessed using the Dynamic Visual Acuity Testing (DVAT) have not been established in NCAA football players. DVAT assesses the Vestibulo-Ocular Reflex (VOR) which is measured in Logarithm of the Minimum Angle of Resolution (logMAR). Decreased VA beyond baseline measures may detect VOR impairment and impact treatment protocols and assist in return to play decisions post-concussion. HYPOTHESIS/PURPOSE: To establish normative VA mean scores during a static head posture as well as dynamically during the DVAT with a head speed of 150 deg/s in the pitch (vertical) and yaw (horizontal) planes rotating 20 degrees in each direction...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28512443/transcranial-direct-current-stimulation-for-post-concussion-syndrome-study-protocol-for-a-randomized-crossover-trial
#18
Robson Luis Oliveira de Amorim, André Russowsky Brunoni, Mirian Akiko Furutani de Oliveira, Ana Luiza Costa Zaninotto, Marcia Mitie Nagumo, Vinícius Monteiro de Paula Guirado, Iuri Santana Neville, Gláucia Rosana Guerra Benute, Mara Cristina Souza de Lucia, Wellingson Silva Paiva, Almir Ferreira de Andrade, Manoel Jacobsen Teixeira
BACKGROUND: Mild traumatic brain injury (MTBI) represents 70-80% of all treated brain injuries. A considerable proportion of MTBI patients experience post-concussion symptoms for a prolonged period after MTBI, and these symptoms are diagnosed as persistent post-concussion syndrome (PPCS). PPCS is defined as a range of physical, cognitive, and emotional symptoms. However, memory and executive dysfunction seems to be one of the most debilitating symptoms. Recently, non-invasive brain stimulation has been studied as a potential treatment method for traumatic brain injury (TBI) patients...
2017: Frontiers in Neurology
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
#19
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/28495201/self-reported-balance-status-is-not-a-reliable-indicator-of-balance-performance-in-adolescents-at-one-month-post-concussion
#20
Coralie Rochefort, Coren Walters-Stewart, Mary Aglipay, Nick Barrowman, Roger Zemek, Heidi Sveistrup
OBJECTIVES: To determine if self-reported balance symptoms can be used as a proxy for measures of the center of pressure (COP) to identify balance deficits in a group of concussed adolescents. DESIGN: Case-control. METHODS: Thirteen adolescents 1-month post-concussion who reported ongoing balance problems (Balance+), 20 adolescent 1-month post-concussion who reported no balance problems (Balance-), and 30 non-injured adolescents (control) completed a series of balance tests...
April 22, 2017: Journal of Science and Medicine in Sport
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