Low voltage is enough - though I strongly contend that voltage varies; we know how to modify it's signalling product, but not the voltage (or frequency/power of the voltage propagation) itself.
Yeah I don't mean zapping anyone, certainly not in the conventional sense - like we're the great lord Raiden,
No - electricity of excitatory cells is rather conservative however, slight variations/tweaking yield profound organism modifications (not least of all the signalling cascade resulting in gene expression variation).
One theory I have been working on is the expression, "the air gets heavy" - like molasses, or rather - like plasma.
Attributed historically to it being "all in the head", like a perceptive enigma with no physical base to it, which I simply don't believe.
A sticky viscous quality to it.
This reliably happens in times of "high tension", tempers running high..... etc.
Voltage for plasma formation in electronics is kilovolts, neurons conduct in mVolts - so, obvious this isn't conventional plasma that's capable of conductance.
........
What I'm saying is there's an unquestionable (yet uncharacterized) relationship between high Excitatory-Motion/Emotional states and neuron electrical conductance.
E-motion, excitatory motion itself = electrical propagation - good feeling in positive emotional states almost certainly relative to signalling it induces (via transmitter discharge).
Emotion = our "feelings", which is simply the nature of neural electricity at a point in time.
Everything we "feel" being a nerve action potential.
It obviously doesn't form glowing plasma but from a physics point of view, that "air goes heavy" feeling correlates directly with high emotional states and thus higher neural electrical activity.