TY - JOUR T1 - Normalized movement quality measures for therapeutic robots strongly correlate with clinical motor impairment measures JF - IEEE Transactions on Neural Systems and Rehabilitation Engineering Y1 - 2010 A1 - Ozkan Celik A1 - O'Malley, M.K. A1 - Boake, Corwin A1 - H.S. Levin A1 - Yozbatiran, Nuray A1 - Reistetter, Timothy AB - In this paper, we analyze the correlations between four clinical measures (Fugl–Meyer upper extremity scale, Motor Activity Log, Action Research Arm Test, and Jebsen-Taylor Hand Function Test) and four robotic measures (smoothness of movement, trajectory error, average number of target hits per minute, and mean tangential speed), used to assess motor recovery. Data were gathered as part of a hybrid robotic and traditional upper extremity rehabilitation program for nine stroke patients. Smoothness of movement and trajectory error, temporally and spatially normalized measures of movement quality defined for point-to-point movements, were found to have significant moderate to strong correlations with all four of the clinical measures. The strong correlations suggest that smoothness of movement and trajectory error may be used to compare outcomes of different rehabilitation protocols and devices effectively, provide improved resolution for tracking patient progress compared to only pre- and post-treatment measurements, enable accurate adaptation of therapy based on patient progress, and deliver immediate and useful feedback to the patient and therapist. VL - 18 UR - http://dx.doi.org/10.1109/TNSRE.2010.2047600 ER -