Guest guest Posted March 1, 2006 Report Share Posted March 1, 2006 Hi, Matt, I've had that happen once or twice also. What equipment are you using? I usually watch the numbers and visual breakdown of the spectrum on Instruments 1 while I'm recording an assessment. I can tell right away if one side is much more active than the other and I know that I need to check the hook-up on both sides. There may be more impedance on one side than the other. I have Active EEGs now, so it's not as important, but when I was using a Braintrainer, if one site wasn't clean enough or I hadn't got a mostly hair-free spot, it would be much lower than the other side. Hope that helps. Merrie Elisens Oklahoma > > I recentlhy did a TLC and questioned the results, especially as > several of the sites had distinctly higher amplitudes in all > frequency ranges on the electrode on the right. I redid it and the > results corrected to some degree but not at the temporal sites. I've > seen this pattern before. > My question is could there be any problems with the underlying > calculation algorithms in the TLC, particularly at the temporal site > calculations? > If Pete or others are convinced that they are correct, is there any > way to do a quick visual check on the data as it is being recorded so > that one can check that against what is the TLC report produces? > -Matt > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 2, 2006 Report Share Posted March 2, 2006 Matt, The data is simply copied into the file from whatever output it into the Excel text file. It is placed on the Raw page (which is a hidden page you can open by going to Format: Sheet: Unhide). There is no algorithm that moves the data. Simple formulas go to the Raw or the Amplitude page and move the data from one cell to another. Possible, I suppose, that you have a corrupted formula on one of your pages. If you download the latest versions of everything and install them, that should fix that. If you are seeing some people who have this problem and others who do not, it's unlikely it's a problem in the assessment. Could be an offset problem between electrodes (though that should show up in all sites on one side) or a connection problem. OR...it could be that, as often happens, the temporal lobes are quite different, since they are the furthest apart sites we check among the homologous sites, they have quite different functions and they are very susceptible to injuries. Pete > > From: " Matt Fleischman " <matt541@...> > Date: 2006/03/01 Wed AM 11:45:38 EST > " Van Deusen " < > > Subject: verifying TLC data > > I recentlhy did a TLC and questioned the results, especially as several of the sites had distinctly higher amplitudes in all frequency ranges on the electrode on the right. I redid it and the results corrected to some degree but not at the temporal sites. I've seen this pattern before. My question is could there be any problems with the underlying calculation algorithms in the TLC, particularly at the temporal site calculations? If Pete or others are convinced that they are correct, is there any way to do a quick visual check on the data as it is being recorded so that one can check that against what is the TLC report produces? -Matt Quote Link to comment Share on other sites More sharing options...
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