This was current when I was in college. That was, let's see, around 1981.

It’s an intestinator!

https://en.m.wikipedia.org/wiki/Fortress_(1992_film)

The preprint is available on bioxiv

https://www.biorxiv.org/content/10.1101/2024.04.25.591220v1....

Interesting that the OP article focuses mostly on just recording activity, where this paper seems focused on electrostimulation by the device itself.

Edit: Looks like this is because the original article is talking about this paper, instead of the one you've linked https://www.nature.com/articles/s41928-024-01160-w

What sort of diseases/issues would this be used to monitor?