Re: question about 10-20 map

Besides that I am experimenting with using analog switches for the
electrodes. I'm not sure what the result will be, that's why I say it is
just an experiment. I may decide it just won't work. If I can make It work
I could be able to select any 2 of many electrodes for inputs. I'm studying
the features of the switches and trying to choose the right ones to order.
If anyone knows a good part number to test that  would be helpful. So far I
have tested 2 and I have ordered more. Right now I am using a multiplexer
and grounding the unused electrodes to prevent crosstalk. At least I
believe that is the issue I'm having. This will not work with my active
electrodes because I am grounding the output of the electrodes. I am going
to try using switches instead of a multiplexer. From what I have found
there are switches with high off isolation. The "T" switch design has
higher off isolation. Then there are switches that have crosstalk between
channels. If I can't eliminate that I could go with individual packages. I
think the active electrodes will improve the switch capability. I don't
keep my designs secret. I would rather be able to discuss them, unless
someone wants to talk business.

Thanks

On Thu, Aug 6, 2015 at 10:01 AM, wikitronic <[email protected]> wrote:

> I don't have much of a vocabulary in eeg terms. If ,for example, I want to
> measure the left temporal lobe,the 10-20 map shows t3 and t5 for that
> region. A more detailed map shows four locations marked T. Some of the
> regions are on opposite sides of the head such as o1 and o2. Would T3 and
> T4 be a valid choice or only t3 and t5 ?
>
>
> What information can I gather from a simple eeg device and where do I
> place the electrodes?
>
> Basically, I'm making a headband/cap for the head and I need to know where
> to put the electrodes.
>
> Thanks,
>

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