Seizures on 24-hour EEG recordings

[Jaime Capilla López]

Good morning, I am doing my PhD and this is the first time I am dealing with Open Ephys. My interest is in studying how many seizures occur over 24 hours in EEG and EMG recordings from certain animal models.

I have the log files and am more or less being able to work with the GUI software. I would like to know if it is possible to set a threshold and have Open Ephys calculate over the 24 hours of recording how many times my signal exceeds that threshold. I don't know if I have to use Matlab for this or if there is a way to do it with Open Ephys.

Thanks in advance for your help.

Best regards,

Jaime

[Josh Siegle]

Hi Jaime,

It sounds like the Crossing Detector plugin could help with your application. That allows you to specific a threshold for one channel, and it will emit an event whenever the threshold is crossed.

The Crossing Detector has previously been combined with the Multi-Band Integrator with the specific goal of detecting seizure events in real time. This will probably be more robust than using the Crossing Detector alone, because the Multi-Band Integrator filters the data in seizure-specific frequency bands, rather than using the raw signal. You can test it out by replaying some pre-recorded data through your signal chain using the File Reader.

Josh 

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