Abstract Summary
One of the fundamental motor deficits after stroke is abnormal coordinative patterns. However, it is still unclear underlying mechanisms of the motor deficit characteristic of stroke. Here, we investigated how stroke affects individual joint contributions to the abnormal coordinative patterns during passive arm movements. Stroke survivors performed passive arm movements using an exoskeleton robot and were compared to age-matched normal controls. The uncontrolled manifold analysis was used to quantify the variability of joint angles and torques in task-relevant space and task-irrelevant space, respectively. Normalized individual joint contributions to each space were calculated. We found that the wrist joint contribution to task-irrelevant space in stroke group was significantly higher as compared to control group. Our results indicate that that stroke would exert more influence over wrist joint.
Sign in to ORCID