There are a lot of invasive technologies in use today that are used to stimulate organs, the nervous system, the brain, and pain receptors in the body.
One example, would be a device that stimulates the vagus nerve, relieving arthritis pain. https://blog.applysci.com/?p=3170
Where can I source a list of the frequencies, pulse duration, and voltages used in such applications?
There are many papers describing the frequencies used/DC vs. AC etc. A few are treated as trade secrets, but easy to figure out from the literature or FDA website
I suggest checking this article :
Article Engineering the Next Generation of Clinical Deep Brain Stimu...
It depends on the region and target for stimulation. For example, in deep brain stimulation, Subthalamic nucleus is the target for Parkinson's disease. And the standard clinical stimulation parameters are: 130 Hz, 65µs pulse width, cathodic first, rectangular pulses, usually current stimulations. The amplitude varies according to the electrode dimensions. From couple of hundreds of µA to tenth of mA. The reason they use current stimulation instead of voltage stimulation, is that the electrode impedance could change over time, and in order to keep the delivered charge consistent, current stimulators are the way to go.
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