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Guided Force Training with the ARM Guide in Chronic Stroke Lennie Kahn Heidi Waldinger Heidi Roth W. Zev Rymer David Reinkensmeyer MARS-RERC September 2004 Advisory Board Meeting Sensory Motor Performance Program, Rehabilitation Institute of Chicago Department of Mechanical and Aerospace Engineering, University of California - Irvine MIME ARM Guide (Mirror Image Movement Enabler) (Assisted Rehabilitation and Measurement) Free Reaching Results 14 * significant difference between groups (p<0.05) * increases in reach extent [cm] 12 MIME Conventional therapy ARM Guide Free reaching exercise 10 * 8 6 4 2 0 -2 -4 -6 forward medial forward lateral shoulder level forward tabletop level The ARM Guide and Guided Force Training Aims & Hypotheses Aims: to implement guided force training using the ARM Guide to compare guided force training with traditional therapy and free reaching therapy for restoring UE function Hypotheses: Guided force training… accounts for the difference between the MIME and ARM Guide free reaching outcomes will be more effective than free reaching exercises and conventional therapy in promoting arm movement recovery Since the last meeting… Added adaptive assistance normalized to each subject’s functional ability during guided force protocol Trained 9 participants • • • 2 guided force therapy 4 free reaching therapy 3 conventional OT Adaptive assistance The assistance converges to approximate a single value CL01 CL10 Preliminary training outcomes Guided force Free reaching Conventional OT Δ supported range 18.5% 14.6% 6.3% Δ supported velocity 12.5% 16.3% 12.2% CL10 distance to target [m] 0.8 0.6 0.6 0.4 0.4 0.2 0.2 0 1 2 target 3 CL01 0.8 4 0 1 2 target 3 4 Activities of daily living 50 Average time per task [s] 45 40 35 30 25 20 15 10 5 0 Guided force training Free reaching Conventional OT (18.4) (8.7) (-0.2)