Visual feedback alters force control and functional activity in the visuomotor network after stroke.

ABSTRACT: Modulating visual feedback may be a viable option to improve motor function after stroke, but the neurophysiological basis for this improvement is not clear. Visual gain can be manipulated by increasing or decreasing the spatial amplitude of an error signal. Here, we combined a unilateral visually guided grip force task with functional MRI to understand how changes in the gain of visual feedback alter brain activity in the chronic phase after stroke. Analyses focused on brain activation when force was produced by the most impaired hand of the stroke group as compared to the non-dominant hand of the control group. Our experiment produced three novel results. First, gain-related improvements in force control were associated with an increase in activity in many regions within the visuomotor n

SUBMITTER: Archer DB 

PROVIDER: S-EPMC5700823 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature