Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 I don't believe anyone can beam sonic impulses at a fetus and reasonably expect that it doesn't do any harm. The only advantage I can see to it is that you might be able to tell if there are any severe problems that need tobe taken care of while the baby is still in utero. But I don't think that sonograms should be used too often. Tom Administrator Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 When I speak of " brain damage " , I do not mean it in a derogatory way. I'm no expert, but I would imagine that EVERYONE has brain damage occurring EVERYDAY. Maybe they drink some alcohol and kill off a few brain cells. Or some free-radical damage naturally occurs. Or some exposure to toxins, or whatever. When I say brain damage, I am not saying SEVERE brain damage, where a person is incapacitated in some form. I think ALL CELLS (including brain cells) go through a cycle of damage/repair/regrowth. I could be wrong. In general, I think the American medical system is a little overzealous in poking and prodding a pregnant mother. I think we should hold pregnant mothers in high regard and cherish the unborn fetus. Even if an ultrasound only kills off a couple brain cells (a seemingly insignificant amount), not enough to call someone " brain damaged " , I still think we should allow parents to make an informed decision about the risks/benefits of getting an ultrasound. Dan > From: " Rainbow . " <rainbow@...> > Subject: Re: Handedness > > >Leif: " I am left-handed, and surely do not like the theories about > brain-damage in babies from various, suspect, unverified, sources. " > > I also am right-minded (left-handed) and am not brain damaged in any > respect. > > Rainbow > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 There were some studies to suggest that ultrasounds cause brain damage and cause people to be left-handed. Here's some more info on that topic: ----------------------------- The Swedish team from the Karolinska Institute in Stockholm compared almost 7,000 men whose mothers underwent scanning in the 1970's with 172,000 men whose mothers did not, looking for differences in the rates of left and right-handedness. The team found men whose mothers underwent scanning were significantly more likely to be left-handed than normal. According to the Swedish team, the human brain undergoes critical development until relatively late in pregnancy, making it vulnerable to damage. The male brain is especially at risk, as it continues to develop later than the female one. http://www.anythingleft-handed.co.uk/lefty_research_current.html#4 ----------------------------- A recent summary of the safety of ultrasound in human studies, published in May 2002 in the prestigious US journal Epidemiology concluded: " ..there may be a relation between prenatal ultrasound exposure and adverse outcome. Some of the reported effects include growth restriction, delayed speech, dyslexia, and non-right-handedness associated with ultrasound exposure. Continued research is needed to evaluate the potential adverse effects of ultrasound exposure during pregnancy. These studies should measure the acoustic output, exposure time, number of exposures per subject, and the timing during the pregnancy when exposure(s) occurred. " (Marinac-Dabic 2002). http://www.birthlove.com/free/ultrasound.html ----------------------------- Studies on humans exposed to ultrasound have shown that possible adverse effects include premature ovulation (Testart 1982), preterm labour or miscarriage (Lorenz, 1990; Saari-Kemppainen 1990), low birth weight (Newnham, 1993, Geerts 1996), poorer condition at birth (Thacker 1985; Newnham, 1991), perinatal death (Davies 1992) dyslexia (Stark 1984), delayed speech development (, 1993) and less right-handedness (Salvesen 1993: Kieler 1998a, Salvesen 1999, Kieler 2001). Non right-handedness is, in other circumstances, seen as a marker of damage to the developing brain (see Odent 1998, Keiler 2001). One Australian study showed that babies exposed to 5 or more doppler ultrasounds were 30% more likely to develop intrauterine growth retardation (IUGR)- a condition that ultrasound is often used to detect. (Newnham, 1993) http://www.birthlove.com/free/ultrasound.html ----------------------------- Scientists in Sweden say they have found evidence that ultrasound scans may cause brain changes in unborn babies, after they found men whose mothers had tests were more likely to be left-handed. The study suggested that scanning produced an extra three left-handed babies per one-hundred births. This research has come under some criticism, since it implies that left-handed people are in some way " brain damaged. " http://en.wikipedia.org/wiki/Left-handed#Ultrasound ----------------------------- > Date: Thu, 22 Dec 2005 09:51:23 -0800 > From: " Rainbow . " <rainbow@...> > Subject: Re: Handedness > > >Dan: " A tangible indicator of this damage may be that it > causes the > baby to be left-handed. " > > Dan, could you please explain this further. I don't see the > connection. > > Rainbow > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 >Dan: " I would imagine that EVERYONE has brain damage occurring EVERYDAY."Oh, okay. I guess you would just call 'living' dangerous to our health and safety! I understand 'damage' to mean ABnormal structural changes within our bodies.  Rainbow Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 >Through Dan: "The team found men whose mothers underwent scanning were significantly more likely to be left-handed than normal."I guess this all depends on what the meaning of 'normal' is........ If compared to several year 'old' studies where children were 'forced' to fit the right hand regime, this makes sense. I don't believe there could possibly be a connection. This might be an example of statistics made to fit a theory - like ultrasounded babies are more likely have brown eyes and brown hair......  Rainbow Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 I know I was given two ultra-sounds whilst pregnant with my son - one fairly early on and another later when he was quite developed. He is definitely right handed and has blue eyes :-) he wasn't premature either - infact he went over the time he was due by about almost two weeks and was above average birth weight (almost 8lbs). > > >Through Dan: " The team found men whose mothers underwent scanning > were significantly more likely to be left-handed than normal. " > > I guess this all depends on what the meaning of 'normal' is........ > If compared to several year 'old' studies where children were > 'forced' to fit the right hand regime, this makes sense. I don't > believe there could possibly be a connection. This might be an > example of statistics made to fit a theory - like ultrasounded babies > are more likely have brown eyes and brown hair...... > > Rainbow > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 23, 2005 Report Share Posted December 23, 2005 I know I was given two ultra-sounds whilst pregnant with my son - one fairly early on and another later when he was quite developed. He is definitely right handed and has blue eyes :-) he wasn't premature either - infact he went over the time he was due by about almost two weeks and was above average birth weight (almost 8lbs). > > >Through Dan: " The team found men whose mothers underwent scanning > were significantly more likely to be left-handed than normal. " > > I guess this all depends on what the meaning of 'normal' is........ > If compared to several year 'old' studies where children were > 'forced' to fit the right hand regime, this makes sense. I don't > believe there could possibly be a connection. This might be an > example of statistics made to fit a theory - like ultrasounded babies > are more likely have brown eyes and brown hair...... > > Rainbow > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 8, 2006 Report Share Posted January 8, 2006 Can anyone provide me with guidelines for using the TLC assess and training guidelines for someone who is left handed? ie is the usual F3>F4 (>1.1)for beta ratio applicable and likewise F4>F3 (>1.1) for alpha ratio? Any particular implications for someone who started off left handed was forced via schooling to be right handed and now considers himself ambi-dextrous? Thanks Mark Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 8, 2006 Report Share Posted January 8, 2006 about 85% of the left-handed people are still left-side dominant for language, which is the key. I'm unaware of anything in son's or others work indicating that the emotional valence of the prefrontal hemispheres changes with left-handedness, though I don't know that anyone has really looked at it. Watch for the activation pattern between left and right, and if it is consistently stronger (lower T/B ratios or greater drops) on the right, then you may have a reverse-dominant brain. Pretty rare in my experience, though. Pete > > From: " Mark Baddeley " <baddeley@...> > Date: 2006/01/08 Sun PM 08:08:24 EST > < > > Subject: Handedness > > Can anyone provide me with guidelines for using the TLC assess and training guidelines for someone who is left handed? ie is the usual F3>F4 (>1.1)for beta ratio applicable and likewise F4>F3 (>1.1) for alpha ratio? Any particular implications for someone who started off left handed was forced via schooling to be right handed and now considers himself ambi-dextrous? > Thanks > Mark > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 8, 2006 Report Share Posted January 8, 2006 Thanks,Pete. That helps heaps. Handedness> > Can anyone provide me with guidelines for using the TLC assess and training guidelines for someone who is left handed? ie is the usual F3>F4 (>1.1)for beta ratio applicable and likewise F4>F3 (>1.1) for alpha ratio? Any particular implications for someone who started off left handed was forced via schooling to be right handed and now considers himself ambi-dextrous?> Thanks> Mark> > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 9, 2006 Report Share Posted January 9, 2006 For a left hander (my daughter) with head injury and resultant loss of speech, how can it be determined from the EEG if she is part of that 15% with right hand language dominance? The initial injury was predominantly on the right side, which shows huge concentrations of delta and low SMR and alpha (scooped histogram), but is substantially diffuse so that the left side also shows obvious evidence of trauma. Thus it isn't clear from the TLC assessment whether she has left or right speech dominance. Nor is it clear whether the speech problems are due to injury to the "speech areas" or to motor areas, ie., loss of speech due to loss of motor control of tongue mouth, larynx etc. Speech therapy shows a lot of promise and I would like to bolster it via NF. nick mammano Van Deusen <pvdtlc@...> wrote: about 85% of the left-handed people are still left-side dominant for language, which is the key. I'm unaware of anything in son's or others work indicating that the emotional valence of the prefrontal hemispheres changes with left-handedness, though I don't know that anyone has really looked at it. Watch for the activation pattern between left and right, and if it is consistently stronger (lower T/B ratios or greater drops) on the right, then you may have a reverse-dominant brain. Pretty rare in my experience, though.Pete> > From: "Mark Baddeley" <baddeley@...>> Date: 2006/01/08 Sun PM 08:08:24 EST> To: < >> Subject: Handedness> > Can anyone provide me with guidelines for using the TLC assess and training guidelines for someone who is left handed? ie is the usual F3>F4 (>1.1)for beta ratio applicable and likewise F4>F3 (>1.1) for alpha ratio? Any particular implications for someone who started off left handed was forced via schooling to be right handed and now considers himself ambi-dextrous?> Thanks> Mark> > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 9, 2006 Report Share Posted January 9, 2006 Nick How old is your daughter and what are her written and reading like compared to her pre-injury condition? Mark Handedness> > Can anyone provide me with guidelines for using the TLC assess and training guidelines for someone who is left handed? ie is the usual F3>F4 (>1.1)for beta ratio applicable and likewise F4>F3 (>1.1) for alpha ratio? Any particular implications for someone who started off left handed was forced via schooling to be right handed and now considers himself ambi-dextrous?> Thanks> Mark> > Quote Link to comment Share on other sites More sharing options...
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