A device that was implanted into the brains of people with traumatic brain injuries substantially improved their cognitive function a year later, a small study suggests
Also, if it was the same test, everyone does better on a test they've taken before. They should have also tested 6 regular people that never had tbi's to see how they compared.
It's science reporting and not immune to headline inflation, but it's not a lie to say there were measured improvements to patient cognition.
There's a developing consensus that electric stimulation has therapeutic potential in restoring brain function (from basal ganglion to transdermal stim). But if you want the full study findings here, I course this article because it looks the DOI address at the bottom.
Given how few (none) treatments they're are for TBIs right now, this is pretty exciting stuff to me at least.