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King Devick

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87 papers 25 to 100 followers
By David Rhine MD FRCPC. Emergency medicine. Special interest in concussion management.
Omar Akhand, John-Ross Rizzo, Janet C Rucker, Lisena Hasanaj, Steven L Galetta, Laura J Balcer
BACKGROUND: Concussion leads to neurophysiologic changes that may result in visual symptoms and changes in ocular motor function. Vision-based testing is used increasingly to improve detection and assess head injury. This review will focus on the historical aspects and emerging data for vision tests, emphasizing rapid automatized naming (RAN) tasks and objective recording techniques, including video-oculography (VOG), as applied to the evaluation of mild traumatic brain injury. METHODS: Searches on PubMed were performed using combinations of the following key words: "concussion," "mild traumatic brain injury," "rapid automatized naming," "King-Devick," "mobile universal lexicon evaluation system," "video-oculography," and "eye-tracking...
October 24, 2018: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
James R Clugston, Sara P D Chrisman, Zachary M Houck, Breton M Asken, Jonathan K Boone, Thomas A Buckley, Nicole L Hoffman, Julianne D Schmidt, Anthony P Kontos, Michael S Jaffee, Kimberly G Harmon, Steven P Broglio, Michael A McCrea, Thomas W McAllister, Justus D Ortega
OBJECTIVE: To explore differences in baseline King-Devick Test (KD) completion time between 2 testing modalities: (1) spiral-bound paper cards (cards) and (2) iPad application (iPad). DESIGN: Cross-sectional cohort analysis. SETTING: National Collegiate Athlete Association (NCAA) institutions. PARTICIPANTS: Student athletes from 13 women's and 11 men's collegiate sports who completed KD baseline testing as part of their first year in the Concussion Assessment, Research and Education (CARE) Consortium from 2014 to 2016 (n = 2003, 52...
October 23, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
S P D Chrisman, K G Harmon, J D Schmidt, T W Kaminski, T A Buckley, A P Kontos, J R Clugston, M McCrea, T McAllister, S P Broglio, J Ortega
The King-Devick (K-D) test is often used as part of a multimodal assessment to screen for sport-related concussion. However, the test involves reading numbers, and little is known about variation in baseline performance on the K-D by reading skill level. We conducted a cross-sectional study analyzing data from the Concussion Assessment, Research and Education (CARE) Consortium to assess differences in baseline performance on the K-D associated with factors that impact reading skill level (learning disorder [LD] and primary home language other than English [PHLOTE]), while controlling for covariates (gender, type of sport, attentional issues, history of concussion and modality of administration)...
October 12, 2018: Annals of Biomedical Engineering
Ethan A Hood, Dennis W Klima, Kevin K Chui, Nicholas J Avallone
This study's objectives were to assess the test-retest reliability and concurrent validity of the King-Devick Test (KDT) during concussion screening and to analyze potential sport-specific differences in test performance across two sports. Two hundred and sixty-six high school male American football and soccer players recruited from four area high schools participated prior to the fall sports season. Main outcome measures included the KDT and Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)...
October 18, 2018: Research in Sports Medicine
Ryan N Moran, Tracey Covassin
The King-Devick (K-D) test has gained popularity as a sideline concussion assessment tool, comprising of visual tracking and saccadic eye movements. However, limited normative data exist for youth athletes under the age of 13. The purpose of this study was to establish normative reference values and examine the internal consistency of the K-D test in youth athletes. The K-D test was administered to 422 youth football and soccer athletes prior to their respective season. The average K-D score was 54.29 ± 11...
December 2018: Scandinavian Journal of Medicine & Science in Sports
David R Howell, Anna N Brilliant, Eileen P Storey, Olivia E Podolak, William P Meehan, Christina L Master
Quantification of visual deficits may help to identify dysfunction following concussion. We evaluated eye-tracking measurements among adolescents within 10 days of concussion and healthy control participants. Patients who reported to 2 tertiary care sport concussion clinics within 10 days of concussion completed an objective eye tracking assessment. Seventy-nine participants completed the study, 44 with concussion (mean age = 14.1 ± 2.2 years, 39% female) and 35 controls (mean age = 14.3 ± 2.4 years, 57% female)...
October 2018: Journal of Child Neurology
Brandon Webb, Dave Humphreys, Matthew Heath
Executive dysfunction represents the most persistent sequela of mild traumatic brain injury. It is, however, largely unclear whether a sport-related concussion similarly contributes to a persistent executive dysfunction even when an athlete has been cleared medically for return to play. Here, individuals with a diagnosis of a sport-related concussion-and their age- and sex-matched controls-completed an oculomotor assessment during the acute and later stages of injury recovery. Prosaccades (i.e., saccade to a target) and executive-related antisaccades (i...
August 15, 2018: Journal of Neurotrauma
Thomas G Urosevich, Joseph J Boscarino, Stuart N Hoffman, H Lester Kirchner, Charles R Figley, Richard E Adams, Carrie A Withey, Joseph A Boscarino
Introduction: Traumatic brain injury (TBI) and post-traumatic stress disorder are considered the signature injuries of the Iraq and Afghanistan conflicts. With the extensive use of improvised explosive devices by the enemy, the concussive effects from blast have a greater potential to cause mild TBI (mTBI) in military Service Members. These mTBI can be associated with other physical and psychological health problems, including mTBI-induced visual processing and eye movement dysfunctions...
May 24, 2018: Military Medicine
Phillip R Worts, Philip Schatz, Scott O Burkhart
BACKGROUND: The Vestibular/Ocular Motor Screening (VOMS) and King-Devick (K-D) test are tools designed to assess ocular or vestibular function after a sport-related concussion. PURPOSE: To determine the test-retest reliability and rate of false-positive results of the VOMS and K-D test in a healthy athlete sample. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2. METHODS: Forty-five healthy high school student-athletes (mean age, 16...
July 2018: American Journal of Sports Medicine
David Silver, Nicola Brown, Conor Gissane
AIM: To assess the frequency of reported head injuries in youth community Rugby Union and determine whether the King-Devick (K-D) test could be used by parents as a means to chart cognitive recovery following head injury. METHODS: A prospective cohort study of 489 junior players (U9-U18) conducted at a community level Rugby Union club over four seasons. All players undertook a baseline K-D test at the start of each season. Players identified with suspected concussion performed the K-D test post injury and results were compared to their most recent baseline assessment...
May 15, 2018: Journal of the Neurological Sciences
Mark Hecimovich, Doug King, Alasdair R Dempsey, Myles Murphy
OBJECTIVES: Sport-related concussion (SRC) research has focused on impaired oculomotor function. The King-Devick (K-D) test measures oculomotor performance and is reported to identify suboptimal brain function. The use of the K-D test in Australian football (AF), a sport involving body contact and tackling, has not been documented. Therefore, the objective of this study was to determine the test-retest reliability and diagnostic accuracy of the K-D test on a sub-elite AF team. DESIGN: Prospective cohort study METHODS: In total, 22 male players (19...
October 2018: Journal of Science and Medicine in Sport
Ryan Eddy, John Goetschius, Jay Hertel, Jacob Resch
OBJECTIVE: To determine the test-retest reliability and the influence of exercise on King-Devick (K-D) test performance. DESIGN: Crossover study design. SETTING: Controlled laboratory. PARTICIPANTS: Participants consisted of 63 (39 women and 24 men) healthy, recreationally active college students who were 21.0 + 1.5 years of age. INDEPENDENT VARIABLES: Participants completed the K-D test using a 2-week, test-retest interval...
March 26, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
Shira Russell-Giller, Diana Toto, Mike Heitzman, Mustafa Naematullah, John Shumko
BACKGROUND: The King-Devick (K-D) test is a rapid number-naming task that has been well validated as a sensitive sideline performance measure for concussion detection. Patients with concussion take significantly longer to complete the K-D test than healthy controls. Previous research suggests that ocular motor deficits, specifically saccadic abnormalities, may be an underlying factor for the prolonged time. However, these findings have not been studied at length. HYPOTHESIS: K-D testing time of concussed adolescents at the initial clinical concussion visit will positively correlate with vestibular/ocular motor screening (VOMS) total scores...
July 2018: Sports Health
Ryan N Moran, Tracey Covassin, R J Elbin, Dan Gould, Sally Nogle
BACKGROUND: The Vestibular/Ocular Motor Screening (VOMS) measure is a newly developed vestibular and ocular motor symptom provocation screening tool for sport-related concussions. Baseline data, psychometric properties, and reliability of the VOMS are needed to further understand the applications of this tool, especially in the youth population, where research is scarce. PURPOSE: To establish normative data and document the internal consistency and false-positive rate of the VOMS in a sample of nonconcussed youth athletes...
May 2018: American Journal of Sports Medicine
Richard A Armstrong
Traumatic brain injury (TBI) and its associated concussion are major causes of disability and death. All ages can be affected but children, young adults and the elderly are particularly susceptible. A decline in mortality has resulted in many more individuals living with a disability caused by TBI including those affecting vision. This review describes: (1) the major clinical and pathological features of TBI; (2) the visual signs and symptoms associated with the disorder; and (3) discusses the assessment of quality of life and visual rehabilitation of the patient...
November 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
Alexa M Dessy, Frank J Yuk, Akbar Y Maniya, Alex Gometz, Jonathan J Rasouli, Mark R Lovell, Tanvir F Choudhri
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...
December 7, 2017: Curēus
Priya S Dhawan, Danielle Leong, Lisa Tapsell, Amaal J Starling, Steven L Galetta, Laura J Balcer, Trenton L Overall, Jennifer S Adler, Rashmi B Halker-Singh, Bert B Vargas, David Dodick
Background: Sports concussion has an annual incidence of approximately 3.8 million. Over half go unreported and a substantial number may be asymptomatic. A rapid, cost-effective, and reliable tool that facilitates diagnosis of concussion is needed. The King-Devick (K-D) test is a vision-based tool of rapid number naming for assessment of concussion. In this study, we evaluated the utility of the K-D test in real time for identification of symptomatic concussion in youth athletes and to determine if similar impairment (subclinical concussion) exists in youth athletes without an obvious head injury or symptoms...
December 2017: Neurology. Clinical Practice
Dhiren Naidu, Carley Borza, Tara Kobitowich, Martin Mrazik
Sideline assessment tools are an important component of concussion evaluations. To date, there has been little data evaluating the clinical utility of these tests in professional football. The purpose of this study was to evaluate the clinical utility of the King-Devick (K-D) test in evaluating concussions in professional football players. Baseline data was collected over two consecutive seasons in the Canadian Football League as part of a comprehensive medical baseline evaluation. A pilot study with the K-D test began in 2015 with 306 participants and the next year (2016) there were 917 participants...
April 30, 2018: Journal of Neurotrauma
R Moran, T Covassin
OBJECTIVE: This study examined the effect of baseline risk factors on the King-Devick (K-D) test in youth athletes, including of age, sex, and history of concussion. METHODS: A total of 422 youth football and soccer athletes between the ages of 8 and 14 completed a baseline K-D test prior to the start of their respective seasons. Participant age, sex, and history of concussion were analyzed for K-D performance (i.e., errors and baseline time). A series of Mann-Whitney U tests were conducted to determine the effects of risk factors on performance...
December 15, 2017: Journal of the Neurological Sciences
Heather Dillon Anderson, Scott A Biely
OBJECTIVE: To establish normative values for the King-Devick (K-D) test to be used as a reference for determining impairment related to concussion when individual baseline scores are lacking. METHOD: Baseline K-D scores were collected for 243 participants aged 18-86. RESULTS: The mean age of subjects was 40.46; range 18-86 years. The mean time was 42.2 seconds; 26.19-75.96 seconds. There was a relationship (r = 0.376) between K-D score and age; scores increased (worsened) with age...
2017: Brain Injury: [BI]
2017-11-10 13:18:05
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