Validating the measurement of upper limb sensorimotor behavior utilizing a tablet in neurologically intact controls and individuals with chronic stroke.

This was a measurement validation, not a treatment study, so it cannot show that tablet-based assessment improves stroke outcomes or changes therapy. Three stroke participants were excluded from the tablet portion because they needed full gravitational support, so the tablet may only suit mild or moderate upper limb impairment. The stroke group had mostly mild to moderate impairment, with an average FMA score of 53.4 ± 15.87, and many had a perfect FMA score of 66, which limits comparisons with clinical scores. The tablet and robot tasks were not identical: reaches were 6 cm on the tablet and 10 cm on the robot, and the cursor was enlarged from 0.4 cm to 0.6 cm on the tablet. The robot supported the arms against gravity, while the tablet rested on a desk and allowed different reaching strategies. The custom analysis differed from the proprietary robot analysis for some measures, and the robot analysis documentation was not fully available. Some stroke participants used adaptive pen grips or wrist orthotics, which could affect movement. Older controls showed weak tablet-robot correlations, so device agreement was not consistent across groups.

No author conflicts are stated in the supplied text. The article is tagged as NIH extramural research support.

Do not conclude the tablet improves stroke upper-limb function or treatment outcomes; this was a measurement validation, not an intervention study, and three stroke participants could not complete the tablet portion without full gravitational support.