Stroke Rehab Device (IMAGE) Georgia Institute of Technology Caption A pneumatic actuator tendon hammer hits a person's wrist while a transcranial magnetic stimulator creates a weak signal in the brain's motor cortex. The responses overlap in the brain, produce and send a strong signal back to the arm, and the wrist moves. Credit Georgia Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.