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We want to embed ECG and EOG electrodoes/systems with EPOC Flex

We want to embed ECG and EOG electrodoes/systems with EPOC Flex as well as sync the data to the Emotiv system, how can we do that?

One way is to use sacrifice some of the Flex sensors and position those inputs to collect ECG or EOG inputs. You may be able to attach a custom-made lead into the Flex sensor socket (for example, wrap a felt pad in foil and solder a standard lead for disposable stick-on sensors onto the foil). The ECG / EOG signals will be recorded on those channels, sharing the same referencing and time base as EEG. Large, rapidly rising signals may be slightly distorted (there is an built-in slew rate limit of 65uV/sample - signals changing faster than that rate will be limited) but the overall waveform shape is retained.

Another option is to use the marker system in EmotivPRO to occasionally synchronise the two time bases. If your recording software for the other devices can generate outputs you can use that feature to send markers which will appear in the EEG stream.

Finally, you can use the Lab Streaming Layer (LSL) output from EmotivPRO to send data to an LSL server. If your other devices also support LSL the server will take care of any timing discrepancies between the different inputs.

Updated on 25 Mar 2024

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