Rapid Automatized Picture Naming in an Outpatient Concussion Center: Quantitative Eye Movements during the Mobile Universal Lexicon Evaluation System (MULES) Test

Number and picture rapid automatized naming (RAN) tests are useful sideline diagnostic tools. The main outcome measure of these RAN is the completion time, which prolonged with a concussion, yet yields no information about eye movement behavior. We investigated movements during digitized Mobile Universal Lexicon Evaluation System (MULES) test naming. A total 23 participants history concussion 50 control performed MULES testing simultaneous tracking. times were longer in (32.4 s [95% CI 30.4, 35.8] vs. 26.9 25.9, 28.0], t=6.1). made more saccades per than controls (3.6 3.3, 4.1] 2.7 2.5, 3.0]), this increase was correlated (r = 0.46, p 0.026). inter-saccadic intervals (ISI) did not differ between groups, nor they correlate times. Following behavior differs number versus performance. Prior studies have shown that ISI prolongation key finding for number-based test, whereas study shows primary an increased saccade picture-based test. Number-based may be complimentary detection, as detect different injury effects or compensatory strategies.