Postural stability during visual-based cognitive and motor dual-tasks after ACLR. Issue 2 (February 2021)

• Record Type: Journal Article
• Authors: Miko, Sarah C.; Simon, Janet E.; Monfort, Scott M.; Yom, Jae P.; Ulloa, Sergio; Grooms, Dustin R.
• Is Part Of: Journal of science and medicine in sport. Volume 24:Issue 2(2021)
• Page Start: 146
• Page End: 151
• Publication Date: 2021-02
• Subjects: ACL -- Motor control -- Return to sport; Sports sciences -- Periodicals; Sports medicine -- Periodicals; Exercise -- Physiological aspects -- Periodicals; Sports -- physiology -- Periodicals; Sports Medicine -- Periodicals; Sportgeneeskunde; 617.102705
• DOI: 10.1016/j.jsams.2020.07.008
• Languages: English
• ISSNs: 1440-2440

Abstract

Abstract: Objectives: Determine the effect of visual-based motor and cognitive dual tasking on postural stability in those with anterior cruciate ligament reconstruction relative to matched controls. Design: Cohort study. Methods: Fourteen volunteers with history of anterior crucaite ligament reconstruction were matched with fourteen healthy controls. Participants performed single leg balance tasks under 4 conditions: (1) single leg balance with eyes-open, (2) single leg balance while catching a ball (dual-motor), (3) single leg balance while repeating a string of numbers in reverse order after viewing them (dual-cognitive) and (4) single leg balance with eyes-closed. Participants completed several patient-reported outcomes of knee function. Mixed effects models were used to identify group differences on the center of pressure measures of ellipse area and root-mean-squared excursion (medial–lateral and anterior–posterior). The mixed models included subject pair as a random factor and group (control, anterior cruciate liagement reconstruction), balance condition (eyes-open, eyes-closed, dual-cognitive, and dual-motor), and group*condition as fixed effects. Tukey post-hoc pairwise comparisons were performed for significant interaction and main effects with an α = 0.05. Results: A significant group by condition interaction was observed for ellipse area and medial–lateral root-mean-squared excursion. The anterior cruciate ligament reconstruction group had higher ellipse area ( p = 0.002, d = 0.44) and medial–lateral root-mean-squared excursion ( p < 0.001, d = 0.49). Conclusions: Postural stability is greatly impaired under eyes-closed and dual-motor conditions relative to eyes-open. Anterior cruciate ligament reconstructed individuals have greater postural instability during the dual-cognitive condition that may indicate unique neural processing deficits remain following anterior cruciate ligament reconstruction.