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King Devick

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68 papers 25 to 100 followers
By David Rhine MD FRCPC. Emergency medicine. Special interest in concussion management.
https://www.readbyqxmd.com/read/29115854/baseline-king-devick-scores-for-adults-are-not-generalizable-however-age-and-education-influence-scores
#1
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]
https://www.readbyqxmd.com/read/29064869/vision-and-vestibular-system-dysfunction-predicts-prolonged-concussion-recovery-in-children
#2
Christina L Master, Stephen R Master, Douglas J Wiebe, Eileen P Storey, Julia E Lockyer, Olivia E Podolak, Matthew F Grady
OBJECTIVE: Up to one-third of children with concussion have prolonged symptoms lasting beyond 4 weeks. Vision and vestibular dysfunction is common after concussion. It is unknown whether such dysfunction predicts prolonged recovery. We sought to determine which vision or vestibular problems predict prolonged recovery in children. DESIGN: A retrospective cohort of pediatric patients with concussion. SETTING: A subspecialty pediatric concussion program...
October 20, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29035981/clinical-utility-of-oculomotor-and-electrophysiological-measures-in-identifying-concussion-history
#3
Patrick S Ledwidge, Jessie N Patterson, Dennis L Molfese, Julie A Honaker
OBJECTIVE: To examine whether oculomotor and electrophysiological measures improve the clinical performance of the typical concussion protocol for classifying collegiate athletes with a history of concussion. DESIGN: Cross-sectional. SETTING: University Athletic Medicine and Research Facility. PARTICIPANTS: Forty-five varsity collegiate athletes. INDEPENDENT VARIABLES: Collegiate varsity athletes with or without a history of a diagnosed concussion...
October 10, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28885451/visual-structure-and-function-in-collision-sport-athletes
#4
Danielle Leong, Christina Morettin, Leonard V Messner, Robert J Steinmetz, Yi Pang, Steven L Galetta, Laura J Balcer
BACKGROUND: Vision-based measures have been shown to be useful markers in multiple sclerosis (MS), Alzheimer and Parkinson disease. Therefore, these testing paradigms may have applications to populations explaining repetitive head trauma that has been associated with long-term neurodegenerative sequelae. We investigated retinal structure and visual function in professional collision sport athletes compared to age- and race-matched control participants. METHODS: In this cross-sectional study, participants underwent spectral-domain optical coherence tomography (OCT) measurements of peripapillary retinal nerve fiber layer (RNFL) and macular ganglion cell complex (GCC = ganglion cell + inner plexiform layers) thickness...
September 6, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28859119/characteristics-of-the-king-devick-test-in-the-assessment-of-concussed-patients-in-the-subacute-and-later-stages-after-injury
#5
Arsenije Subotic, Windsor Kwan-Chun Ting, Michael D Cusimano
Although the King-Devick (K-D) test has been used frequently in assessing sports related concussion early after injury, its characteristics over time after injury and in patients with prolonged persistent symptoms are unknown. The purpose of this paper was to: evaluate the ability of the K-D Test to distinguish patients seen early after concussion from those with symptoms persisting more than 3 months compared to controls, assess changes in the K-D test times over time after concussion, and determine the relationship of K-D times to the Stroop Color and Word Test scores...
2017: PloS One
https://www.readbyqxmd.com/read/28778826/less-efficient-oculomotor-performance-is-associated-with-increased-incidence-of-head-impacts-in-high-school-ice-hockey
#6
Adam W Kiefer, Christopher DiCesare, Patrick Nalepka, Kim Barber Foss, Staci Thomas, Gregory D Myer
OBJECTIVES: To evaluate associations between pre-season oculomotor performance on visual tracking tasks and in-season head impact incidence during high school boys ice hockey. DESIGN: Prospective observational study design. METHODS: Fifteen healthy high school aged male hockey athletes (M=16.50±1.17years) performed two 30s blocks each of a prosaccade and self-paced saccade task, and two trials each of a slow, medium, and fast smooth pursuit task (90°s(-1); 180°s(-1); 360°s(-1)) during the pre-season...
July 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27122448/comment-on-article-king-devick-test-reference-values-and-associations-with-balance-measures-in-high-school-american-football-players
#7
LETTER
Steve Devick
No abstract text is available yet for this article.
May 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28746058/rapid-number-naming-and-quantitative-eye-movements-may-reflect-contact-sport-exposure-in-a-collegiate-ice-hockey-cohort
#8
Lisena Hasanaj, Sujata P Thawani, Nikki Webb, Julia D Drattell, Liliana Serrano, Rachel C Nolan, Jenelle Raynowska, Todd E Hudson, John-Ross Rizzo, Weiwei Dai, Bryan McComb, Judith D Goldberg, Janet C Rucker, Steven L Galetta, Laura J Balcer
BACKGROUND: The King-Devick (K-D) test of rapid number naming is a reliable visual performance measure that is a sensitive sideline indicator of concussion when time scores worsen (lengthen) from preseason baseline. Within cohorts of youth athletes <18 years old, baseline K-D times become faster with increasing age. We determined the relation of rapid number-naming time scores on the K-D test to electronic measurements of saccade performance during preseason baseline assessments in a collegiate ice hockey team cohort...
July 25, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28716270/rapid-sideline-performance-meets-outpatient-clinic-results-from-a-multidisciplinary-concussion-center-registry
#9
G Kyle Harrold, Lisena Hasanaj, Nicholas Moehringer, Isis Zhang, Rachel Nolan, Liliana Serrano, Jenelle Raynowska, Janet C Rucker, Steven R Flanagan, Dennis Cardone, Steven L Galetta, Laura J Balcer
OBJECTIVE: This study investigated the utility of sideline concussion tests, including components of the Sports Concussion Assessment Tool, 3rd Edition (SCAT3) and the King-Devick (K-D), a vision-based test of rapid number naming, in an outpatient, multidisciplinary concussion center treating patients with both sports-related and non-sports related concussions. The ability of these tests to predict clinical outcomes based on the scores at the initial visit was evaluated. METHODS: Scores for components of the SCAT3 and the K-D were fit into regression models accounting for age, gender, and sport/non-sport etiology in order to predict clinical outcome measures including total number of visits to the concussion center, whether the patient reached a SCAT3 symptom severity score≤7, and the total types of referrals each patient received over their course...
August 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28679302/an-evidence-based-approach-to-the-creation-of-normative-data-base-rates-of-impaired-scores-within-a-brief-neuropsychological-battery-argue-for-age-corrections-but-against-corrections-for-medical-conditions
#10
Megan E O'Connell, Holly Tuokko, Stacey Voll, Martine Simard, Lauren E Griffith, Vanessa Taler, Christina Wolfson, Susan Kirkland, Parminder Raina
OBJECTIVE: We detail a new approach to the creation of normative data for neuropsychological tests. The traditional approach to normative data creation is to make demographic adjustments based on observations of correlations between single neuropsychological tests and selected demographic variables. We argue, however, that this does not describe the implications for clinical practice, such as increased likelihood of misclassification of cognitive impairment, nor does it elucidate the impact on decision-making with a neuropsychological battery...
August 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/28630809/technical-report-of-the-use-of-a-novel-eye-tracking-system-to-measure-impairment-associated-with-mild-traumatic-brain-injury
#11
Michael Kelly
This technical report details the results of an uncontrolled study of EyeGuide Focus, a 10-second concussion management tool which relies on eye tracking to determine the potential impairment of visual attention, an indicator often of mild traumatic brain injury (mTBI). Essentially, people who can visually keep steady and accurate attention on a moving object in their environment likely suffer from no impairment. However, if after a potential mTBI event, subjects cannot keep attention on a moving object in a normal way as demonstrated on their previous healthy baseline tests...
May 15, 2017: Curēus
https://www.readbyqxmd.com/read/28634467/brain-network-activation-technology-does-not-assist-with-concussion-diagnosis-and-return-to-play-in-football-athletes
#12
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/28574312/elevated-intracranial-pressure-and-reversible-eye-tracking-changes-detected-while-viewing-a-film-clip
#13
Radek Kolecki, Vikalpa Dammavalam, Abdullah Bin Zahid, Molly Hubbard, Osamah Choudhry, Marleen Reyes, ByoungJun Han, Tom Wang, Paraskevi Vivian Papas, Aylin Adem, Emily North, David T Gilbertson, Douglas Kondziolka, Jason H Huang, Paul P Huang, Uzma Samadani
OBJECTIVE The precise threshold differentiating normal and elevated intracranial pressure (ICP) is variable among individuals. In the context of several pathophysiological conditions, elevated ICP leads to abnormalities in global cerebral functioning and impacts the function of cranial nerves (CNs), either or both of which may contribute to ocular dysmotility. The purpose of this study was to assess the impact of elevated ICP on eye-tracking performed while patients were watching a short film clip. METHODS Awake patients requiring placement of an ICP monitor for clinical purposes underwent eye tracking while watching a 220-second continuously playing video moving around the perimeter of a viewing monitor...
June 2, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28515977/establishing-normative-change-values-in-visual-acuity-loss-during-the-dynamic-visual-acuity-test
#14
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/28511593/convergence-insufficiency-identifies-athletes-at-risk-of-prolonged-recovery-from-sport-related-concussion
#15
Kevin M DuPrey, David Webner, Adam Lyons, Crystal H Kucuk, Jeffrey T Ellis, Peter F Cronholm
BACKGROUND: Sensitive and specific screening methods are needed to identify athletes at risk of prolonged recovery after sport-related concussion (SRC). Convergence insufficiency (CI) is a common finding in concussed athletes. PURPOSE: To assess the relationship between CI and recovery after SRC at the initial office visit. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: In this retrospective cohort study, 270 athletes (147 male, 123 female), mean ± SD age 14...
August 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28446457/consensus-statement-on-concussion-in-sport-the-5-th-international-conference-on-concussion-in-sport-held-in-berlin-october-2016
#16
Paul McCrory, Willem Meeuwisse, Jiří Dvorak, Mark Aubry, Julian Bailes, Steven Broglio, Robert C Cantu, David Cassidy, Ruben J Echemendia, Rudy J Castellani, Gavin A Davis, Richard Ellenbogen, Carolyn Emery, Lars Engebretsen, Nina Feddermann-Demont, Christopher C Giza, Kevin M Guskiewicz, Stanley Herring, Grant L Iverson, Karen M Johnston, James Kissick, Jeffrey Kutcher, John J Leddy, David Maddocks, Michael Makdissi, Geoff T Manley, Michael McCrea, William P Meehan, Sinji Nagahiro, Jon Patricios, Margot Putukian, Kathryn J Schneider, Allen Sills, Charles H Tator, Michael Turner, Pieter E Vos
No abstract text is available yet for this article.
April 26, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28387548/review-of-vestibular-and-oculomotor-screening-and-concussion-rehabilitation
#17
REVIEW
Anthony P Kontos, Jamie McAllister Deitrick, Michael W Collins, Anne Mucha
Vestibular and oculomotor impairment and symptoms may be associated with worse outcomes after sport-related concussion (SRC), including prolonged recovery. In this review, we evaluate current findings on vestibular and oculomotor impairments as well as treatment approaches after SRC, and we highlight areas in which investigation is needed. Clinical researchers have intimated that recovery from SRC may follow certain clinical profiles that affect the vestibular and oculomotor pathways. Identifying clinical profiles may help to inform better treatment and earlier intervention to reduce recovery time after SRC...
March 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28387693/visual-vestibular-processing-deficits-in-mild-traumatic-brain-injury
#18
W G Wright, R T Tierney, J McDevitt
BACKGROUND: The search for reliable and valid signs and symptoms of mild traumatic brain injury (mTBI), commonly synonymous with concussion, has lead to a growing body of evidence that individuals with long-lasting, unremitting impairments often experience visual and vestibular symptoms, such as dizziness, postural and gait disturbances. OBJECTIVE: Investigate the role of visual-vestibular processing deficits following concussion. METHODS: A number of clinically accepted vestibular, oculomotor, and balance assessments as well as a novel virtual reality (VR)-based balance assessment device were used to assess adults with post-acute concussion (n = 14) in comparison to a healthy age-matched cohort (n = 58)...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/28362161/test-retest-reliability-of-the-king-devick-test-in-an-adolescent-population
#19
Tyler J Oberlander, Bernadette L Olson, Lee Weidauer
CONTEXT:   The King-Devick (KD) test is a screening tool designed to assess cognitive visual impairments, namely saccadic rhythm, postconcussion. Test-retest reliability of the KD in a healthy adolescent population has not yet been established. OBJECTIVE:   To investigate the overall test-retest reliability of the KD among a sample of healthy adolescents. Additionally, we sought to determine if sex and age influenced reliability. DESIGN:   Cross-sectional study...
May 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28270437/what-are-the-critical-elements-of-sideline-screening-that-can-be-used-to-establish-the-diagnosis-of-concussion-a-systematic-review
#20
REVIEW
Jon Patricios, Gordon Ward Fuller, Richard Ellenbogen, Stanley Herring, Jeffrey S Kutcher, Mike Loosemore, Michael Makdissi, Michael McCrea, Margot Putukian, Kathryn J Schneider
BACKGROUND: Sideline detection is the first and most significant step in recognising a potential concussion and removing an athlete from harm. This systematic review aims to evaluate the critical elements aiding sideline recognition of potential concussions including screening tools, technologies and integrated assessment protocols. DATA SOURCES: Bibliographic databases, grey literature repositories and relevant websites were searched from 1 January 2000 to 30 September 2016...
March 7, 2017: British Journal of Sports Medicine
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