This study is testing whether rehabilitation using muscle activity signals can help improve arm and hand movement in people after stroke or spinal cord injury.
In the main study, participants will use a virtual-reality feedback system that is controlled by surface electromyography (EMG). Surface EMG uses sensors placed on the skin to detect muscle activity. The feedback will help participants practise upper limb movements during rehabilitation.
A related sub-study will run alongside the main study. In this sub-study, functional electrical stimulation will also be used to help activate muscles during training.
The study will assess whether these rehabilitation approaches improve upper limb function. It will also explore whether changes in biological or movement-related markers are linked with recovery.