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Jon Hacker

Jon Hacker

Founder and CEO of NeurGear, creator of the ZenBud ultrasound vagus nerve stimulator

Sep 15, 2026

12:29
So maybe walk us through what it actually does and why, why the vagal tone has become such a hot biomarker for, for stress resilience, and even longevity.
12:44
So long story short, if your body is stressed out constantly, it's not gonna do good things for you.
12:50
That's top line.
12:52
Uh, your vagus nerve is essentially your steady state.
12:56
It's responsible for a part of something called your autonomic nervous system.
12:59
That's what's going on without conscious involvement.
13:02
So you don't directly control your vagus nerve's activity, right? It's going on regardless, keeping your heart pumping, talking to your lungs to an extent, and just keeping your body in that constant, everything's okay, and that rest and digest.

17 MINS LATER

30:30
Yeah.
6:57
And what led you there and what was it about that target that seemed appealing?
7:03
So there's two basicities on which we went over, auricular versus cervical.
7:07
And there is a really potent argument when you compare auricular versus cervical stimulation, right? Which comes down to the fibers, right? The amount of fibers going up and down in cervical and auricular regions.
7:17
We wanted this to be more targeted, and we did not want to get efferent fibers activated.
7:23
So efferent fibers are fibers leading to the brain, giving information to your brain about what's happening in the body.
7:27
Efferent fibers are your brain telling the body what to do.
7:31
Right.

54 MINS LATER

61:50
I would love to hear about the technology a little bit, the tool and the research of it.
22:42
Say that one time, your nervous system will always choose short-term survival.
22:48
Yes.
22:49
When it is in survival state, you'll always choose and optimize for survival in that moment.
22:55
It's not going to look at a week from now.
22:57
It's not going to look at months from now.
22:58
It's not going to look at years from now.
23:00
And the problem is, is there it seems to be that there's a lot of people that are stuck in the survival state for like 90 to 95 percent of the time for years on end, if not even 100 percent of the time.
27:19
And there's some other things that I question about the physiology of the vagus nerve, i.e., from my understanding, yes, it goes from the brain to the body, but does the signaling of the vagus nerve, is that a peripheral signal also coming from my hands and my feet? What does that feedback loop look like?
0:00
When I was very young, I developed some decently severe OCD, and the way I escaped that, ironically enough, was getting obsessed with the cause, which is your n-

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