Inclusion Criteria:  Inclusion criteria will include:  Age 20-70, year six months following a stroke or SCI Less than two hears following a stroke of SCI Actively extend at least ten degrees at the metacarpophalangeal and interphalangeal joints, extend ten degrees at the wrist and had at least 30 degrees of active flexion-extension of the elbow and shoulder.  Adequate vision to see the required images on a standard computer monitor. E) Able to provide informed consent  Exclusion Criteria:  excessive spasticity (grade three and above on the Ashworth scale) (11), any significant cognitive impairment (Montreal Cognitive Assessment scores less than 25) (12) Any other neurological disorder with the exception of a single stroke prior to testing.