Knee kinematics following acl reconstruction in females; the effect of vision on performance during a cutting task.

摘要: PURPOSE/BACKGROUND Specific movement patterns have been identified as influential in ACL injury; however several key kinematic variables that might be predictive of future performance not fully investigated. The purpose this research was to: 1) determine if subjects with reconstruction display different displacement, velocity, and time to peak ground reaction force (GRF) during cutting activities than healthy subjects, 2) observe visual disruption differences these variables, 3) alters relative subjects. METHODS Seventeen female 17 unilateral (ACLR) performed 40 trials a which knee position measured via 3D electromagnetic system. Visual conditions were randomized disrupt vision for 1 second the subject began movement, or allow full duration. Independent lead/push off leg (ACLR limb non-dominant limb) (disrupted full). 2-way ANOVAs utilized between kinematics using dependent displacement (m), absolute velocity (m/sec), reach GRF (% cut). RESULTS Knee significantly less ACLR (.76±.11; .75±.16) (.85±.08; .87±.12). slower (.81±.14; .84±.16) (.92±.11; .97±.14). A significant interaction noted average (p<.05). Time longer (79.41±2.28) (76.65±4.41). CONCLUSIONS Subjects displayed an increased subjects' knee. appeared some effect on by effects. These adjustments may indicative altered motor program allows successful safe task completion while reducing forces load LEVEL OF EVIDENCE Level 2.