The BrainGate Array (IMAGE) Brown University Caption The BrainGate array, which is implanted on the motor cortex, comprises nearly 100 electrodes on a chip the size of a baby aspirin. Credit <a href="http://www.braingate2.org">www.braingate2.org</a> Usage Restrictions With Credit. 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.