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  • Title: Persistent vestibular-ocular impairment following concussion in adolescents.
    Author: Sinnott AM, Elbin RJ, Collins MW, Reeves VL, Holland CL, Kontos AP.
    Journal: J Sci Med Sport; 2019 Dec; 22(12):1292-1297. PubMed ID: 31521485.
    Abstract:
    OBJECTIVES: The current study investigated the role of persistent vestibular-ocular symptoms and impairment following sport-related concussion on recovery time and clinical outcomes among adolescents. DESIGN: Prospective cohort. METHODS: 50 (F-22/M-28) adolescents aged 12-20 years completed a vestibular-ocular motor screening, neurocognitive assessment, and the Post-Concussion Symptom Scale (PCSS) at clinical assessments conducted at 0-10 and 11-21 days after concussion. Participants were assigned to: 1) persistent vestibular-ocular (PERSIST), 2) vestibular-ocular improvement (IMPROVE), or 3) no vestibular-ocular impairment (NONE) groups based on vestibular-ocular motor screening conducted during each assessment. A 3 (GROUP) X 2 (TIME) ANOVA was performed on neurocognitive and symptom scores, and a between-subjects ANOVA was performed for recovery time. RESULTS: 49 subjects were identified among the PERSIST (n=17), IMPROVE (n=12) and NONE (n=20) groups. There were no neurocognitive performance differences between groups at 0-10 days post-concussion, but groups differed on PCSS at 11-21 days (p=.001), with the PERSIST (29.0±24.9) group reporting higher symptoms than the NONE (5.45±10.0; p=.005) group. The PERSIST group took significantly longer to recover (34.9±11.6 days) than the NONE (22.9±14.9 days) group (p=.03). All groups improved on verbal (p<.001) and visual memory (p=.028), visual motor speed (p=.005), and reaction time (p=.004) from 0-10 to 11-20 days following SRC and no significant group by time interactions for cognitive scores identified. CONCLUSIONS: Persistent post-concussion vestibular-ocular symptoms and impairment may influence neurocognitive performance and clinical recovery following sport-related concussion.
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