> This type of neuron helps generate a brain rhythm, termed a gamma oscillation, which links neurons together so that they form coordinated networks to produce a behavior, such as movement. Stroke causes the brain to lose gamma oscillations. Successful physical rehabilitation in both laboratory mice and humans brought gamma oscillations back into the brain and, in the mouse model, repaired the lost connections of parvalbumin neurons.

>Carmichael and the team then identified two candidate drugs that might produce gamma oscillations after stroke. These drugs specifically work to excite parvalbumin neurons.

Asking while being total layperson here - can we generate those gamma oscillations by an [may be implanted] electronic device?

Edit: and google search to help, judging by the dates seems to be a pretty fresh field :

https://journals.plos.org/plosbiology/article?id=10.1371/jou...

"... by pairing robotic rehabilitation with a clinical-like noninvasive 40 Hz transcranial Alternating Current Stimulation, we achieved similar motor improvements mediated by the effective restoring of movement-related gamma band power, improvement of PV-IN maladaptive network dynamics, and increased PV-IN connections in premotor cortex. "

It also sounds like getting an exoskeleton for such patients can be helpful not only to perform immediate tasks, it also can be a part of the restoring process.