Wrist Kinematic Coupling and Performance During Functional Tasks: Effects of Constrained Motion

Surgical Treatments for Scapholunate Advanced Collapse Wrist: Kinematics and Functional Performance

“…9,17 Global wrist kinematics were calculated as the rotational movement of the third metacarpal coordinate frame with respect to the distal forearm frame. The FE axis and RUD axis are mutually orthogonal wrist joint axes both embedded in the distal forearm; pronation-supination motion was calculated but is not reported (Fig.…”

“…These results were compared with a historical cohort of uninjured, healthy subjects. 9 The cohort, a sample of convenience, was used to compare our data with established norms in a known group of asymptomatic individuals in order to determine which group outcomes were more closely aligned to healthy wrist function. For each outcome, between-group comparisons employed one-way analysis of variance (a ¼ 0.05) with post hoc analysis using the Fisher least significant difference test (a < 0.017).…”

“…9 All subjects signed an informed consent and completed the Edinburgh Inventory to determine handedness 12 and the Patient-Related Wrist Evaluation. 13 Subjects also completed a questionnaire to assess their familiarity and past experience with the functional tasks to be performed in the study.…”

“…These tasks were selected from a larger set of previously studied tasks because they were found to exhibit coupled motion along the dart thrower's plane. 9 In accordance with American Dart League standards, 14 a 0.46-m dartboard positioned 1.8 m off the ground was used as a target. Subjects stood 2.4 m away when throwing and were told to aim for the bull's-eye.…”

“…11 The purpose of our investigation was to compare kinematic coupling and performance during 2 functional tasks in patients following 4CF and PRC and to compare these data with normative values obtained in a previous study of a younger group of healthy controls. 9 Comparing the outcomes to a healthy cohort provides a reference to determine which surgical group more closely approximates healthy wrist kinematic motion and performance. We hypothesized that kinematic coupling parameters and functional task performance would differ between 4CF and PRC and that outcomes of PRC would be more similar to healthy asymptomatic wrist function.…”