Separating the control of moving and holding in human post-stroke arm paresis.

ABSTRACT: Moving and holding-still (holding) have been posited to be separately controlled. The paretic arm after stroke exhibits different abnormalities during rest vs. movement, providing an opportunity to ask whether control of these behaviors is independently affected in stroke. We quantified resting postural abnormalities in human stroke patients by measuring their biases in force production as they held their hand still in various locations in a planar workspace and then assessed whether these resting force biases influenced reaching in the same workspace. Patients displayed marked resting force biases at each location, even when the arm was supported. However, these biases did not transfer to arm-supported planar reaching movements; rather, abnormal resting forces only appeared to swit

SUBMITTER: Hadjiosif AM 

PROVIDER: S-EPMC12700526 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature