Guest guest Posted February 3, 2008 Report Share Posted February 3, 2008 Connie, I don't know a number or a ratio. I recognize it when I see is either on the Histograms or Maps pages. If Delta dominates the EEG on the Histograms page, then it may be a problem (especially if the client has attention or performance issues). It it dominates on the Maps pages, ditto. Especially if it spreads (on the Maps) or gets taller--with artifact removed--(on the Histograms) at task, then it would concern me. It's not uncommon for delta to be greater than theta, but it is the combination of the two that suggests that the brain is dominated by slowwave activity and will thus have difficulty with logical/rational tasks, language-based processing, sequential/hierarchical thought, etc. It's like great art: I know it when I see it. Pete Pete, what type of delta would be considered excessive? If 2-4 is greater than theta would that be too much? We have a ratio or value for everything else. .. _,_._,___ -- Van Deusenpvdtlc@... http://www.brain-trainer.com305/433-3160The Learning Curve, Inc. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 3, 2008 Report Share Posted February 3, 2008 Connie, I don't know a number or a ratio. I recognize it when I see is either on the Histograms or Maps pages. If Delta dominates the EEG on the Histograms page, then it may be a problem (especially if the client has attention or performance issues). It it dominates on the Maps pages, ditto. Especially if it spreads (on the Maps) or gets taller--with artifact removed--(on the Histograms) at task, then it would concern me. It's not uncommon for delta to be greater than theta, but it is the combination of the two that suggests that the brain is dominated by slowwave activity and will thus have difficulty with logical/rational tasks, language-based processing, sequential/hierarchical thought, etc. It's like great art: I know it when I see it. Pete Pete, what type of delta would be considered excessive? If 2-4 is greater than theta would that be too much? We have a ratio or value for everything else. .. _,_._,___ -- Van Deusenpvdtlc@... http://www.brain-trainer.com305/433-3160The Learning Curve, Inc. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 3, 2008 Report Share Posted February 3, 2008 Connie, I work with AD/HD., mostly among adults. Many of my clients have very high delta (and other slow wave activity) across the brain, but particularly in the frontal regions. I read a lot about rations on this list but I have yet to get a clear definition of a bad ratio. For example Theta/Beta > 3 may be a problem but I have trained theta down and brought the ration to something like 1.5 but still see problems with attention. There are so many different sites involved in even the “simplest” problem that training one area only means you have to then move on to another. In addition there is an inverse relationship between amplitude and frequency so it may be normal to have delta show greater amplitude than, for example, theta. It is a problem if it relates to a specific issue presented by the client – paying attention for sustained periods of time for example. I am most concerned when I see high delta in the frontal regions when the client is trying to perform a task, as is so often the case. Even attending to the feedback screen can cause the delta to elevate, in which case I train for short periods of time up to about 5 minutes with 3 to 5 “runs” in a session. (Otherwise the client falls asleep.) I then work to lengthen the time of each run, while training down delta. I try to get in at least 20 minutes in each session. Typically I am training up faster waves such as low beta and beta, depending on the site. A lot of it is trial and error – or at least that has been my experience. In general slow wave activity has to be looked at very carefully. Mike _________________________________________ MICHAEL A. MARTIN, M.Ed. Director, New Horizons Counseling Center, Inc. 2470 Gray Falls Drive, Suite 225 Houston, TX 77077 Tel: Fax: ***CONFIDENTIALITY NOTICE*** This e-mail is the property of the New Horizons Counseling Center and may contain confidential and privileged information that is intended for the sole use of the recipient(s). Any review, use, distribution or disclosure by individuals other than the intended recipient(s) is strictly prohibited. If you are not the intended recipient(s) (or authorized to receive for the recipient), please contact the sender and delete all copies of the message. Thank you. From: braintrainer [mailto:braintrainer ] On Behalf Of Van Deusen Sent: Sunday, February 03, 2008 3:34 AM To: braintrainer Subject: Re: Delta Connie, I don't know a number or a ratio. I recognize it when I see is either on the Histograms or Maps pages. If Delta dominates the EEG on the Histograms page, then it may be a problem (especially if the client has attention or performance issues). It it dominates on the Maps pages, ditto. Especially if it spreads (on the Maps) or gets taller--with artifact removed--(on the Histograms) at task, then it would concern me. It's not uncommon for delta to be greater than theta, but it is the combination of the two that suggests that the brain is dominated by slowwave activity and will thus have difficulty with logical/rational tasks, language-based processing, sequential/hierarchical thought, etc. It's like great art: I know it when I see it. Pete On Feb 2, 2008 11:38 PM, conniewelsh2 <conniewelshwideopenwest> wrote: Pete, what type of delta would be considered excessive? If 2-4 is greater than theta would that be too much? We have a ratio or value for everything else. .. _,_._,___ -- Van Deusen pvdtlcgmail http://www.brain-trainer.com 305/433-3160 The Learning Curve, Inc. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 3, 2008 Report Share Posted February 3, 2008 Thanks so much. From: braintrainer [mailto:braintrainer ] On Behalf Of Sent: Sunday, February 03, 2008 12:48 PM To: braintrainer Subject: RE: Delta Connie, I work with AD/HD., mostly among adults. Many of my clients have very high delta (and other slow wave activity) across the brain, but particularly in the frontal regions. I read a lot about rations on this list but I have yet to get a clear definition of a bad ratio. For example Theta/Beta > 3 may be a problem but I have trained theta down and brought the ration to something like 1.5 but still see problems with attention. There are so many different sites involved in even the “simplest” problem that training one area only means you have to then move on to another. In addition there is an inverse relationship between amplitude and frequency so it may be normal to have delta show greater amplitude than, for example, theta. It is a problem if it relates to a specific issue presented by the client – paying attention for sustained periods of time for example. I am most concerned when I see high delta in the frontal regions when the client is trying to perform a task, as is so often the case. Even attending to the feedback screen can cause the delta to elevate, in which case I train for short periods of time up to about 5 minutes with 3 to 5 “runs” in a session. (Otherwise the client falls asleep.) I then work to lengthen the time of each run, while training down delta. I try to get in at least 20 minutes in each session. Typically I am training up faster waves such as low beta and beta, depending on the site. A lot of it is trial and error – or at least that has been my experience. In general slow wave activity has to be looked at very carefully. Mike _________________________________________ MICHAEL A. MARTIN, M.Ed. Director, New Horizons Counseling Center, Inc. 2470 Gray Falls Drive, Suite 225 Houston, TX 77077 Tel: Fax: ***CONFIDENTIALITY NOTICE*** This e-mail is the property of the New Horizons Counseling Center and may contain confidential and privileged information that is intended for the sole use of the recipient(s). Any review, use, distribution or disclosure by individuals other than the intended recipient(s) is strictly prohibited. If you are not the intended recipient(s) (or authorized to receive for the recipient), please contact the sender and delete all copies of the message. Thank you. From: braintrainer [mailto:braintrainer ] On Behalf Of Van Deusen Sent: Sunday, February 03, 2008 3:34 AM To: braintrainer Subject: Re: Delta Connie, I don't know a number or a ratio. I recognize it when I see is either on the Histograms or Maps pages. If Delta dominates the EEG on the Histograms page, then it may be a problem (especially if the client has attention or performance issues). It it dominates on the Maps pages, ditto. Especially if it spreads (on the Maps) or gets taller--with artifact removed--(on the Histograms) at task, then it would concern me. It's not uncommon for delta to be greater than theta, but it is the combination of the two that suggests that the brain is dominated by slowwave activity and will thus have difficulty with logical/rational tasks, language-based processing, sequential/hierarchical thought, etc. It's like great art: I know it when I see it. Pete On Feb 2, 2008 11:38 PM, conniewelsh2 wrote: Pete, what type of delta would be considered excessive? If 2-4 is greater than theta would that be too much? We have a ratio or value for everything else. .. _,_._,___ -- Van Deusen pvdtlc@... http://www.brain-trainer.com 305/433-3160 The Learning Curve, Inc. Quote Link to comment Share on other sites More sharing options...
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