Guest guest Posted October 6, 2004 Report Share Posted October 6, 2004 Pete and list, Your BioExplorer Assessment Gathering program uses the Power Ratio Design object to compute Theta/Beta ratios. This object computes power (i.e. amplitude squared ) for the full frequency bands as measured by Fourier transform. On the other hand, I believe that Theta/Beta neurofeedback in the past (i.e. not assessment) has generally been done by using as a measure, not power, but amplitude; and not by combining the various amplitudes of different frequencies within the band, but only of the single sine wave output by the frequency band filter. (e.g. Rossiter's study in the Vol. 6 (3) 2002 issue of Journal of Neurotherapy.) Which approach would you or others recommend for computing this ratio to provide feedback? Are there others? For each approach, what are the different ratio values that would be considered excessive in the region of the central strip? Larry PhD 155 E 38, #2C / NYC 10016 212 697 5990 llewis@... > ------- 7Hz > > , > > 7 Hz is seen in various areas around the brain, though especially in > the frontal midline (around Fz) when memory processing is taking place. > It is called " hippocampal " theta, because it is a rhythm produced in > the hippocampus (the memory center inside the temporal lobes) and appears > in the cortex. > > 7Hz is also a visualization frequency. I like to train that (either > through alpha/theta or directly) in the parietal or occipital lobes to > improve a client's ability to visualize performance in advance of doing > it, a kind of programming of the subconscious with the desired outcome. > > 7Hz is also the crossover frequency we aim for in alpha/theta training. > At that frequency clients tend to have visual images of old memory > material, but it takes place without the client actually re-experiencing > or abreacting that material. > > Those are three pretty nice functions for a simple little frequency. > > Van Deusen > http://www.brain-trainer.com > 16246 SW 92nd Ave, Miami, FL 33157 > 305/321-1595 > pvdtlc@... > > > 7 hertz > > > Was wondering why the 7 hertz frequency band is considered important? > > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 6, 2004 Report Share Posted October 6, 2004 Pete and list, Your BioExplorer Assessment Gathering program uses the Power Ratio Design object to compute Theta/Beta ratios. This object computes power (i.e. amplitude squared ) for the full frequency bands as measured by Fourier transform. On the other hand, I believe that Theta/Beta neurofeedback in the past (i.e. not assessment) has generally been done by using as a measure, not power, but amplitude; and not by combining the various amplitudes of different frequencies within the band, but only of the single sine wave output by the frequency band filter. (e.g. Rossiter's study in the Vol. 6 (3) 2002 issue of Journal of Neurotherapy.) Which approach would you or others recommend for computing this ratio to provide feedback? Are there others? For each approach, what are the different ratio values that would be considered excessive in the region of the central strip? Larry PhD 155 E 38, #2C / NYC 10016 212 697 5990 llewis@... > ------- 7Hz > > , > > 7 Hz is seen in various areas around the brain, though especially in > the frontal midline (around Fz) when memory processing is taking place. > It is called " hippocampal " theta, because it is a rhythm produced in > the hippocampus (the memory center inside the temporal lobes) and appears > in the cortex. > > 7Hz is also a visualization frequency. I like to train that (either > through alpha/theta or directly) in the parietal or occipital lobes to > improve a client's ability to visualize performance in advance of doing > it, a kind of programming of the subconscious with the desired outcome. > > 7Hz is also the crossover frequency we aim for in alpha/theta training. > At that frequency clients tend to have visual images of old memory > material, but it takes place without the client actually re-experiencing > or abreacting that material. > > Those are three pretty nice functions for a simple little frequency. > > Van Deusen > http://www.brain-trainer.com > 16246 SW 92nd Ave, Miami, FL 33157 > 305/321-1595 > pvdtlc@... > > > 7 hertz > > > Was wondering why the 7 hertz frequency band is considered important? > > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 17, 2004 Report Share Posted October 17, 2004 Mike, Glad to hear that you guys are doing well with brain training. Carolyn impressed me as having gotten a lot out of the workshops, and your work together on the assessments and training are an excellent way to cement and build on that foundation. You are right that the assessment files show the power ratios during data gathering and the Report files only calculate the amplitude ratios. Much of the original research done with some ratios (especially Theta/Beta) was done with Power ratios, but much of the other stuff (alpha/theta, for example) was done with amplitudes. When the assessment was set up originally, amplitudes were available to us, not power ratios, so that's what I used to set the targets. Now, with BioExplorer, we can look at either, so I show the one to those who wish to look at them during the assessment and put the other in the TLC Assess form to avoid having to have separate sets of targets for different software users. I'm working on a book on the assessment process that will include lots of samples from assessments (it will be an e-book, so it will be easily searchable). Best way to get more to look at would be to go out and gather some yourselves--family, friends, etc. Pete Van Deusen http://www.brain-trainer.com 16246 SW 92nd Ave, Miami, FL 33157 305/321-1595 pvdtlc@... RE: Theta/Beta Ratios Hi, I am Carolyn Thurber's husband, and we have benefited enormously from the your class that she attended this summer in Barb Wolf's home. We are actively and successfully doing NF (with BE) in our home now! I have noticed that the TLC Assess.rpt and TLC Assess BE.xls files do not communicate power ratios at all, even though the TLC Assess gather.bxd design does show the power ratio on a bar graph (real time during the session). In TLC Assess BE.xls, the T/B ratio shown is strictly the average amplitude of Theta divided by the average amplitude of Beta, for each minute of the assessment, not the average power ratio during each minute. Ditto for the A/T ratio. Is this intentional? Do the 1.2 and 2.0 numbers discussed below apply to the T/B ratio provided by the TLC Assess BE.xls file? On another note, Pete, we have learned a great deal from examining the in-class assessments (8 of them) that were done at Barb Wolf's home earlier this Summer, as we've practiced applying the concepts you taught relative to those assessments. This combination has made us more confident and successful in designing protocols that work for each member of our own family. Would you be so kind as to send me some more assessments that you have collected from your various classes, or otherwise? I certainly don't need to know the names of the individuals, but the ages would be welcome. Whatever you can provide easily would be nice! Regards, Mike Thurber (Carolyn's husband) 7289 Princess Anne Drive Mechanicsville, VA 23111 Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 11, 2006 Report Share Posted January 11, 2006 I look for which is lower and, perhaps more importantly, which changes the most in the desired direction when going from EO to task. Pete > > From: " Mark Baddeley " <baddeley@...> > Date: 2006/01/10 Tue PM 06:07:26 EST > < > > Subject: Theta/Beta ratios > > Hi Pete and all > Reflecting on an earlier reply. Is it that by comparing theta/beta ratios for two sites one can determine which site is involved in processing? That is the site with the lower theta/beta ratio is most likely involved in the processing which occurs at task? > Thanks in advance > Mark Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 11, 2006 Report Share Posted January 11, 2006 I look for which is lower and, perhaps more importantly, which changes the most in the desired direction when going from EO to task. Pete > > From: " Mark Baddeley " <baddeley@...> > Date: 2006/01/10 Tue PM 06:07:26 EST > < > > Subject: Theta/Beta ratios > > Hi Pete and all > Reflecting on an earlier reply. Is it that by comparing theta/beta ratios for two sites one can determine which site is involved in processing? That is the site with the lower theta/beta ratio is most likely involved in the processing which occurs at task? > Thanks in advance > Mark Quote Link to comment Share on other sites More sharing options...
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