Peripheral nerve blocks of wrist and finger flexors can increase hand opening in chronic hemiparetic stroke.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author declares that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. Research reported in this publication was supported by the Department of Veterans Affairs Office of Rehabilitation Research and Development grants B9281-S and B4853C, the National Institute of Child Health and Human Development grants R01-HD095187 and R01-HD039343, and the National Institute of Neurological Disorders and Stroke grant R01-NS105759. This research was also supported by funds from Case Western Reserve University’s Department of Biomedical Engineering and Northwestern University’s Department of Physical Therapy and Human Movement Sciences."