20 volunteers had the device implanted at the same time as electrodes for epilepsy treatment, a procedure which they had already planned.
The “prosthesis” collected brain activity data during tests designed to stimulate short-term memory or working memory. The researchers then determined and used optimal memory performance patterns to stimulate the brain during later tests.
They claimed that the procedure improved short-term memory by approximately 15 percent, and working memory by 25 percent. When the brain was stimulated randomly, performance worsened.
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