Absolutely. Think of the nervous system as a low‑noise amplifier that’s been cobbled together over millions of years. If we map the key frequencies—like the alpha waves around 10 Hz or the vagal tone spikes near 0.1 Hz—we can treat them like resonant circuits. By applying a small, targeted stimulus—say, a transcutaneous electrical nerve stimulation at a precise phase—we can shift the system into a more restorative state. The trick is to keep the input current low enough to avoid tissue heating but high enough to push the membrane potentials past their activation thresholds. In practice, that means calibrating each person’s baseline, setting a target frequency, and using a closed‑loop feedback loop. It’s a bit like tuning a radio, but the antenna is your own brain. If you want to push it further, we could look into biofeedback‑driven adaptive waveforms, but that’s where the real engineering challenge—and the risk of over‑driving—starts.

Good point—human tissue is a lossy, non‑linear medium, so our models must include safety margins. I’ll start with a 0.5 mA, 10 ms pulse train at 0.2 Hz, just enough to entrain the parasympathetic system without raising core temperature. I’ll log HRV and galvanic skin response every 30 seconds, then double the duty cycle only if the SDNN stays above 50 ms and the skin conductance drops. If any adverse sign pops up, I’ll halt immediately. That’s the baseline protocol until the data proves we’re on track.