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10k doesn't sound bad at all to me. With active electrodes our lab runs under 20k, and with passive electrodes in eeg/fmri we run under 10k. How does your data look? Have you tried getting ERPs? Cheers, Michael On Tue, Nov 29, 2011 at 4:50 AM, Izabela Szumska <[log in to unmask]>wrote: > Dear Lutfi, > > If you have a problem with all electrodes maybe there is something wrong > with your reference electrode? > Which one Cap do you have? > > > Best, > izabela > > On Tue, Nov 29, 2011 at 12:47 PM, Ameer lutfi shaar <[log in to unmask] > > wrote: > >> Dear All , >> >> i have couple of questions if any one could help me its really important . >> >> what is the standard impedance values for EEG cap electrodes , i tried >> everything i cant get it under 10 K its always yellow , are the Caps bad ? >> or is it like this always . >> what kind of EEG electrodes we can use instead of the cap ? >> whats the minimum acceptable impedance value is good for diagnostics >> >> Best Regards >> >> Lutfi N. Shaar >> Neuro Service Engineer >> >> Al Amin Medical Instruments Co. Ltd. >> Technical Service - Riyadh >> Saudi Arabia >> >> Mobile: +966 54 000 9535 >> Email: [log in to unmask] >> >> >> > > > -- > Izabela Szumska, MSc., > Department of Cognitive Psychology, > University of Finance and Management, > Pawia 55, 01-030 Warsaw, Poland > http://cogn.vizja.pl > > From July 2011 to July 2012 > EPFL Lausanne, Laboratory of Psychophysics, AI-3102 > Station 19, 1015 Lausanne, Switzerland > tel: +41 21 6937228 > > -- Research Associate Gazzaley Lab Department of Neurology University of California, San Francisco