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Reaction time

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By David Rhine MD FRCPC. Emergency medicine. Special interest in concussion management.
Cindy N Nguyen, Reuben N Clements, Lucas A Porter, Nicole E Clements, Matthew D Gray, Russell T Baker
CONTEXT: The Clinical Reaction Time (RTclin ) test has been recommended as a valid test for assessing concussion and determining recovery of reaction time function following concussion. However, it is unknown whether repeat assessment, as is used in post-concussion testing, is affected by learning or practice phenomena. OBJECTIVE: To determine if a practice or learning effect is present with serial administration of the RTclin test. DESIGN: Randomized control trial...
March 27, 2018: Journal of Sport Rehabilitation
Robert C Lynall, J Troy Blackburn, Kevin M Guskiewicz, Stephen W Marshall, Prudence Plummer, Jason P Mihalik
OBJECTIVE: To compare movement reaction time and joint kinematics between athletes with recent concussion and matched control recreational athletes during 3 functional tasks. DESIGN: Cross-sectional. SETTING: Laboratory. PARTICIPANTS: College-aged recreational athletes (N=30) comprising 2 groups (15 participants each): (1) recent concussion group (median time since concussion, 126d; range, 28-432d) and (2) age- and sex-matched control group with no recent concussions...
May 2018: Archives of Physical Medicine and Rehabilitation
David R Howell, Alexandra Stillman, Thomas A Buckley, Brant Berkstresser, Francis Wang, William P Meehan
OBJECTIVES: Quantitative and non-invasive measurements acquired by neurocognitive or gait evaluations are useful concussion management components. Emerging technology has allowed for the development of portable and objective tests which may be potentially useful across many settings where evaluations take place. Our aim was to examine the association between instrumented dual-task gait and tablet-based neurocognitive outcome variables with an acute concussion. DESIGN: A total of 59 collegiate athletes were identified and tested within 5days of concussion (n=18, 50% female, 20±1years of age) or as a part of a baseline examination (n=41, 29% female, 19±1years of age)...
April 2018: Journal of Science and Medicine in Sport
James L Farnsworth, Lucas Dargo, Brian G Ragan, Minsoo Kang
OBJECTIVE:   Although widely used, computerized neurocognitive tests (CNTs) have been criticized because of low reliability and poor sensitivity. A systematic review was published summarizing the reliability of Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) scores; however, this was limited to a single CNT. Expansion of the previous review to include additional CNTs and a meta-analysis is needed. Therefore, our purpose was to analyze reliability data for CNTs using meta-analysis and examine moderating factors that may influence reliability...
September 2017: Journal of Athletic Training
Gianluca Del Rossi
CONTEXT:   A change in reaction time is one of various clinical measures of neurocognitive function that can be monitored after concussion and has been reported to be among the most sensitive indicators of cognitive impairment. OBJECTIVE:   To determine the timeline for clinically assessed simple reaction time to return to baseline after a concussion in high school athletes. DESIGN:   Observational study. SETTING:   Athletic training room...
August 2017: Journal of Athletic Training
Alia L Yasen, David R Howell, Li-Shan Chou, Angela M Pazzaglia, Anita D Christie
PURPOSE: The aim of this study was to prospectively examine the association between intracortical inhibition and functional recovery after mild traumatic brain injury (mTBI). METHODS: Twenty individuals with mTBI and 20 matched control participants were assessed using transcranial magnetic stimulation, the Attentional Network Test, and gait analysis. Hierarchical linear modeling was used to longitudinally examine potential differences between groups and relationships in the pattern of recovery in cortical silent period (CSP) duration, cognitive reaction time, and single- and dual-task walking speeds across five testing time points...
June 2017: Medicine and Science in Sports and Exercise
Susan Churchill, R Scott Miller, Kayla Deru, Steffanie H Wilson, Lindell K Weaver
Simple reaction time (SRT) and procedural reaction time (PRT) are speed-of-processing tasks in the Automated Neuropsychological Assessment Metrics (ANAM) that may be sensitive to mild traumatic brain injury (mTBI). The investigators measured SRT and PRT throughput (correct responses per minute) at baseline, 6 weeks, and 13 weeks in military personnel with mTBI randomized to local care or 40 chamber sessions (sham-1.2 atmospheres absolute [ATA] air, hyperbaric oxygen-1.5 ATA O2). Scores were assessed at baseline using univariate analysis of variance and across time with repeated measures methods...
May 2016: Military Medicine
James T Eckner, James K Richardson, Hogene Kim, Monica S Joshi, Youkeun K Oh, James A Ashton-Miller
Slowed reaction time (RT) represents both a risk factor for and a consequence of sport concussion. The purpose of this study was to determine the reliability and criterion validity of a novel clinical test of simple and complex RT, called RT(clin), in contact sport athletes. Both tasks were adapted from the well-known ruler drop test of RT and involve manually grasping a falling vertical shaft upon its release, with the complex task employing a go/no-go paradigm based on a light cue. In 46 healthy contact sport athletes (24 men; M = 16...
June 2015: Perceptual and Motor Skills
Julianne D Schmidt, Johna K Register-Mihalik, Jason P Mihalik, Zachary Y Kerr, Kevin M Guskiewicz
PURPOSE: This study aimed to determine whether agreement exists between baseline comparison (comparison of postconcussion scores to individualized baseline scores) and normative comparison (comparison of postconcussion scores to a normative mean) in identifying impairments after concussion. METHODS: A total of 1060 collegiate student-athletes completed baseline testing as part of an ongoing clinical program. Gender-specific normative means were obtained from a subset of 673 athletes with no history of self-reported concussion, learning disabilities, or attention-deficit disorders...
September 2012: Medicine and Science in Sports and Exercise
Dmitri Poltavski, David Biberdorf
Abstract In the growing field of sports vision little is still known about unique attributes of visual processing in ice hockey and what role visual processing plays in the overall athlete's performance. In the present study we evaluated whether visual, perceptual and cognitive/motor variables collected using the Nike SPARQ Sensory Training Station have significant relevance to the real game statistics of 38 Division I collegiate male and female hockey players. The results demonstrated that 69% of variance in the goals made by forwards in 2011-2013 could be predicted by their faster reaction time to a visual stimulus, better visual memory, better visual discrimination and a faster ability to shift focus between near and far objects...
2015: Journal of Sports Sciences
Alan J Pearce, Kate Hoy, Mark A Rogers, Daniel T Corp, Charlotte B Davies, Jerome J Maller, Paul B Fitzgerald
OBJECTIVES: This multimodal study investigated the motor, neurocognitive and neurophysiological responses following a sports related concussion injury in the acute-phase (up to 10 days) in sub-elite Australian football players. DESIGN: Between-group, repeated measures. METHODS: Over the course of one season (six months), 43 male players from one football club (25.1 ± 4.5 years) were assessed for fine motor dexterity, visuomotor reaction time, implicit learning and attention...
September 2015: Journal of Science and Medicine in Sport
Nancy Carney, Jamshid Ghajar, Andy Jagoda, Steven Bedrick, Cynthia Davis-OʼReilly, Hugo du Coudray, Dallas Hack, Nora Helfand, Amy Huddleston, Tracie Nettleton, Silvana Riggio
BACKGROUND: Currently, there is no evidence-based definition for concussion that is being uniformly applied in clinical and research settings. OBJECTIVE: To conduct a systematic review of the highest-quality literature about concussion and to assemble evidence about the prevalence and associations of key indicators of concussion. The goal was to establish an evidence-based foundation from which to derive, in future work, a definition, diagnostic criteria, and prognostic indicators for concussion...
September 2014: Neurosurgery
Gianluca Del Rossi, Alfonso Malaguti, Samanta Del Rossi
CONTEXT: Researchers have confirmed that the ruler-drop test could be included as part of a multifaceted concussion-assessment battery and potentially as a way to track recovery from head injury. However, it is unclear if this clinical test of reaction time would be characterized by inconsistent performance because of practice effects. OBJECTIVE: To determine if the ruler-drop test is susceptible to practice effects after serial administration. DESIGN: Descriptive laboratory study...
May 2014: Journal of Athletic Training
Shailesh Reddy, James T Eckner, Jeffrey S Kutcher
PURPOSE: We have developed a reliable and valid clinical test of reaction time (RTclin) that is sensitive to the acute effects of concussion. If RTclin is to be used as a sideline concussion assessment tool then the acute effects of exercise on RTclin may need to be controlled for. The purpose of this study was therefore to determine the effect of exercise on RTclin. METHODS: A gender-balanced group of 42 collegiate athletes were assigned to an exercise (n = 28) and a control (n = 14) group using 2:1 block randomization...
March 2014: Medicine and Science in Sports and Exercise
Jacob N Norris, Walter Carr, Thomas Herzig, D Walter Labrie, Richard Sams
The Concussion Restoration Care Center has used the Automated Neuropsychological Assessment Metrics version 4 Traumatic Brain Injury (ANAM4 TBI) battery in clinical assessment of concussion. The study's aim is to evaluate the prognostic utility of the ANAM4 TBI. In 165 concussed active duty personnel (all ultimately returned to duty) seen and tested on the ANAM4 TBI on days 3 and 5 (median times) from their injury, Spearman's ρ statistics showed that all performance subtests (at day 5) were associated with fewer days return-to-duty (RTD) time, whereas concussion history or age did not...
July 2013: Military Medicine
James T Eckner, Jeffrey S Kutcher, Steven P Broglio, James K Richardson
BACKGROUND: Reaction time (RT) is a valuable component of the sport concussion assessment battery. RT is typically measured using computers running specialised software, which limits its applicability in some athletic settings and populations. To address this, we developed a simple clinical test of RT (RTclin) that involves grasping a falling measuring stick. PURPOSE: To determine the effect of concussion on RTclin and its sensitivity and specificity for concussion...
January 2014: British Journal of Sports Medicine
Elizabeth F Teel, Johna K Register-Mihalik, J Troy Blackburn, Kevin M Guskiewicz
OBJECTIVES: To determine the reliability and effects of a dual-task paradigm on balance and cognitive function compared to a single-task paradigm. DESIGN: Repeated measures. METHODS: Healthy participants (n=23) completed a variation of the Sensory Organization Test and the incongruent Stroop test individually (single-task) and concurrently (dual-task) during two testing sessions. RESULTS: The Sensory Organization Test and incongruent Stroop test had moderate to high reliability (1...
May 2013: Journal of Science and Medicine in Sport
James T Eckner, Jeffrey S Kutcher, James K Richardson
CONTEXT: Reaction time is typically impaired after concussion. A clinical test of reaction time (RT(clin)) that does not require a computer to administer may be a valuable tool to assist in concussion diagnosis and management. OBJECTIVE: To determine the test-retest reliability of RTclinmeasured over successive seasons in competitive collegiate athletes and to compare these results with a computerized measure of reaction time (RT(comp)). DESIGN: Case series with repeated measures...
July 2011: Journal of Athletic Training
M Bianco, M Ferri, C Fabiano, F Giorgiano, S Tavella, U Manili, M Faina, V Palmieri, P Zeppilli
AIM: The aim of the study was to compare baseline cognitive performance of female in respect to male amateur boxers. METHODS: Study population included 28 female amateur boxers. Fifty-six male boxers, matched for age, employment and competitive level to female athletes, formed the control group. All boxers had no history of head concussions (except boxing). Each boxer was requested to: 1) fulfill a questionnaire collecting demographic data, level of education, occupational status, boxing record and number of head concussions during boxing; 2) undergo a baseline computerized neuropsychological (NP) test (CogSport) measuring simple and complex reaction times (RT)...
June 2011: Journal of Sports Medicine and Physical Fitness
James T Eckner, Jeffrey S Kutcher, James K Richardson
OBJECTIVES: To evaluate the effect of concussion on clinically measured reaction time (RT(clin)) and in comparison to a computerized reaction time measure (RT(comp)). DESIGN: Prospective, repeated measures observational study. SETTING: Athletic training clinic at a National Collegiate Athletic Association (NCAA) Division I university. PARTICIPANTS: Data are reported for 9 collegiate athletes with acute concussion who were part of a larger cohort of 209 athletes recruited from the university's football, women's soccer, and wrestling teams before the start of their respective athletic seasons...
March 2011: PM & R: the Journal of Injury, Function, and Rehabilitation
2014-06-20 16:49:56
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