Howdy!
I have a VNS.
I asked my doc that very question. He said that it doesn't matter which
hemisphere of the brain is having seizure activity. Stimulation of the left
vagus nerve sends a current that effects the whole brain.
The reason I asked is because I have seizure activity in BOTH TLs.

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Dave ????
http://www.howdydave.com
> I've read about people having a vegus nerve stimulator implanted to stop
> chronic accute seizures so I started experimenting and discovered I can stop
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> My SPS originate from left temporal lobe where a tumor is located and MRI
> doesn't show any detectable stenosis (narrowing) of the arteries.
Klenow - 07 Dec 2004 01:05 GMT
During the recent live web broadcast of a VNS implantation that I saw, I
think they mentioned that stimulation of the right vagus nerve results in
unwanted cardiac effects (they didn't say what they were), which is why they
only implant on the left. They also said that the mechanism of action of
VNS is still unknown.
> Howdy!
>
[quoted text clipped - 17 lines]
> > My SPS originate from left temporal lobe where a tumor is located and MRI
> > doesn't show any detectable stenosis (narrowing) of the arteries.