The Evolution of Hand Proprioceptive and Motor Impairments in the Sub-Acute Phase After Stroke.

The study only assessed the index finger, so results may not generalize to the whole hand or proximal joints. Participants were included at different times since stroke (average 34 days), though this was not found to significantly influence the results in the statistical model. The definition of 'motor improvement' relied on three different robotic metrics, while 'proprioceptive improvement' relied on only one, which may create a slight imbalance in how improvement was categorized. This was an observational study of usual care; it did not test whether specific interventions could change these recovery patterns.

The authors declared no potential conflicts of interest. The work was funded by the Swiss National Science Foundation, the Deutsche Forschungsgemeinschaft, and the National Research Foundation (Singapore).

Do not interpret the lack of correlation between proprioceptive and motor changes as evidence that one does not influence the other in the long term. This study observed spontaneous recovery and usual care over a short window (2-4 weeks). It shows that these systems can recover independently during this phase, but it does not rule out that targeted sensory training might eventually improve motor outcomes, or that combined deficits might hinder later complex task learning.