In this video we learn about VNS and that depending on the intensity of the electricity VNS is virtually undetectable.
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Question: Is Vagus Nerve Stimulation painful? Mark S. George: Patients tell me that at low intensities, they can't really tell whether it's on or off. I want to know sometimes for my studies, when it is on, when is it off. They can't tell me. If we increase the intensity, the amount of electricity in everybody, we can reach a point where they will be able to say, oh yes, I feel that. They often would say, it's a tickle in the neck or you can hear it in their voice. Interestingly, even there if I increase it to where you could feel it today and then you go out, and you just live with for a month or two and you come back and I ask you can you tell me when its on, you wont be able to. So, people somehow accommodate to even what was at one point noticeable to what they don't notice that. Almost everybody, that's had the device in for six months to a year, they really cannot tell when it's going on or off, unless there is a voice change.