Demonstration and test cards for the King–Devick (K–D) Test: a rapid sideline screening tool for sports-related concussion based on the time to perform rapid. Background The King-Devick (KD) test is an objective clinical test of eye movements that has been used to screen for concussion. 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.

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The test is administered once using the same instructions and the time and errors are recorded and then compared to the subject’s baseline.

The King-Devick test as a determinant of head trauma and concussion in boxers and MMA fighters

Can J Neurol Sci ; Formal eye movements studies 19,20 suggest that these errors likely indicate eye movement inaccuracy as a result of TBI occurring. Revenue Mayo receives will be used to support its nonprofit mission in patient care, education and research. From the Departments of Neurology K.

Received Sep 21; Accepted Nov This test consists of 3 components, including a cognitive history, memory and orientation testing, and a neurologic screening. This study was similar to previous investigations showing that in the absence of concussion, the K—D test has a learning effect associated with repeated testing. The King—Devick test and sports-related concussion: Following completion of the demonstration card upper leftsubjects are then asked to read each of the 3 test cards in the same manner.


Support Center Support Center. The K—D test requires visual processes, eye movements saccades, convergence and accommodationattention and language function. Discussion This study provides additional evidence for the use of the K—D test as an effective, objective sideline assessment tool for concussion.

Wall Street Journal Numbers of errors made in reading the test cards are also recorded; misspeaks on numbers are recorded as errors only if the subject does not immediately correct the mistake before going on to the next number. To perform the K—D test, participants are asked to read the numbers from left to right as quickly as they can without making any errors.

For this cross-sectional study, boxers and MMA fighters were recruited and enrolled prior to sparring sessions and matches conducted in the Boston, MA, area.

DelicataMD, A.

Differences in postfight K-D scores and changes in scores from prefight to postfight were compared for athletes with head trauma during the fight vs devicl without. Impaired eye movements in post-concussion syndrome indicate suboptimal brain function beyond the influence of depression, malingering or intellectual ability.

To the extent that the K-D test captures saccadic eye movements among other important elements of rapid number naming, these data suggest that this quick screening test will be kinb in identifying athletes with signs of concussion.


Electrophysiological abnormalities in well functioning multiple concussed patients. Arch Neurol ; Use of a rapid visual screening tool for the assessment of concussion in amateur rugby league: So some of our athletes we baseline take three or four times to get a good baseline.

Support Center Support Center.

The King–Devick test for sideline concussion screening in collegiate football

Head injury in early adulthood and the klng risk of depression. Chronic traumatic encephalopathy in the National Football League. The K—D test includes one demonstration card and three test cards that vary in format Fig.

J Neurotrauma ; Clin J Sports Med ; Take A Course Concussion Safety: Postfight K-D time scores were significantly higher worse for participants who had head trauma during the match Baseline K—D times for all athletes were established during pre-season physical exams with multiple individuals being testing simultaneously in a noisy training room environment.

Standardized instructions are used and participants are asked to read the numbers from left to right as quickly as they can concussio making any errors.

The K-D test is based on measurement of the speed of rapid number naming.