BioSemi.nl

I've only just started planning a combined EEG & rTMS experiment, and so far I am quite pleased with how well the Biosemi system works with TMS. My observations so far are that the EEG recovers from the TMS pulse very fast, I'm not going to say exactly, but I am pleased with what I can do so far. I ...

Hello, I am using the 32-channel version of the electrode cap. I need to implement a Laplacian reference and I wanted to check-in regarding the appropriate weights to assign neighboring reference electrodes. Is it safe to assume that the locations on the cap conform closely enough to 10-10 or 10-20 ...

[quote="Coen"]From Ohm to uMho (uSiemens): take reciprocal (1/x), and multiply with one million (1,000,000). [/quote] Hi Coen, Based on this, and based on literature that suggests the threshold minimum for a GSR response is >0.02 UMho, we are getting excessively high responses, on the order of 1000-...

Is anyone aware of any publications reporting GSR data recorded with Biosemi equipment?

Best regards,

Dan Zajdel

We are having a little trouble with the reliability of triggering Biosemi with the parallel port on a PC. Does the Biosemi trigger hardware latch the trigger port signals synchronously with the acquisition hardware? Is there any chance Biosemi could be sampling the trigger port while the external tr...

I got it working, Cool Tool! This is going to come in very handy, thank you very much!

How is the TCP/IP server feature in the latest version of actiview (32) supposed to work? I'd like to try out the feature but I can't seem to get it to work.
Dan Zajdel
Neurology
Oregon Health & Science University

Yes, I've tried this procedure as well. I have found so far that the proportion of anterior electrode to posterior electrode that best minimizes the ECG artifact may differ from subject to subject or even from recording to recording. It is a bit of a headache right now in that I am experimenting wit...

We've begun to notice that after our recordings there seems to be much residual Signa gel remaining in the electrode pedestals after a good aggitated cleaning with warm water and Hibiclens (a surgical scrub). I had assumed the gel would be water soluble and clean readily with water and detergent, bu...

Is anyone out there using a non cephalic reference for EEG recordings using Biosemi and Brain Vision?
Many thanks for any comments.
Dan Zajdel
Oregon Health & Science University
Portland OR, USA