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Dr. Bob is Robert Hsiung, MD,
bob@dr-bob.orgShown: posts 1 to 12 of 12. This is the beginning of the thread.
Posted by linkadge on May 3, 2012, at 17:23:43
http://www.sciencedaily.com/releases/2012/05/120502184836.htm
Hmm. I am left handed.
Anyone else here left handed?
Posted by gadchik on May 3, 2012, at 18:29:55
In reply to emotional organization reversed in Left Handers, posted by linkadge on May 3, 2012, at 17:23:43
Im also a lefty,my son is,my mom is,and my grandmother(maternal).Isnt that something??Thanks for the article,interesting!!
Posted by Twinleaf on May 3, 2012, at 21:33:35
In reply to Re: emotional organization reversed in Left Handers » linkadge, posted by gadchik on May 3, 2012, at 18:29:55
That's fascinating! I'm also left handed, and although I do respond well to TMS given to the left hemisphere, perhaps treatment on the right side would be even better. At least, it would be very interesting to look into it further. Thanks for posting that!
Posted by Twinleaf on May 4, 2012, at 19:52:20
In reply to Re: emotional organization reversed in Left Handers, posted by Twinleaf on May 3, 2012, at 21:33:35
There is quite a lot of published information about how the left hemisphere is under- active in depression. Traditional TMS is given at high frequencies to the left hemisphere, with about a 50% improvement ( of 50% or more on standard tests). This is thought to be due to increasing the activity of the left hemisphere
Recently, there has been increasing interest in giving low frequency TMS to the right hemisphere. Low frequencies have the opposite effect; they damp down the activity of the hemisphere. There are recent reports of low- intensity treatment of the right hemisphere being even more effective than high- intensity left hemisphere stimulation in improving depressive symptoms.
It would be important to know how differing emotional organization of the brain in left-handed people would influence which hemisphere, and at what intensity, electrical stimulation would be most effective. I haven't found anything about that yet.
Posted by linkadge on May 4, 2012, at 20:54:48
In reply to TMS and the hemispheres, posted by Twinleaf on May 4, 2012, at 19:52:20
Or even more important still.....what about ECT in left handers? If it is given unlaterally to 'preserve' cognition, would it be more appropriate to shock the other side in left handers?
I'd hate to think we've been shocking the wrong side of the left hander's brains.
Linkadge
Posted by Twinleaf on May 4, 2012, at 22:57:54
In reply to Re: TMS and the hemispheres » Twinleaf, posted by linkadge on May 4, 2012, at 20:54:48
I have always been under the impression that it is quite rare for reasoning and verbal processes to be in the right hemisphere, even when a person is left- handed. That's why it was so interesting that emotional processing may switch hemispheres according to handed ness.
I don't know whether anything backs this up, but I have read, somewhere, that left-handlers who write "upside down" have verbal processing in their left hemispheres, but those who write the same as right- handlers do may have hemisphere reversal.
There is an interesting thread below about the new ways of doing ECT - briefer pulses and more on the right side. You may not be the only one thinking that a mistake may have been made for all these years!
Posted by linkadge on May 5, 2012, at 8:32:29
In reply to Re: TMS and the hemispheres » linkadge, posted by Twinleaf on May 4, 2012, at 22:57:54
Hmm.
I am left handed but I write with the same hand position as a right hander (no arch).
I'd be interested in knowing what my brain is doing.
By most accounts I am an odd individual :)
The things that 'most' people like to talk about and do seem incredably bizzare to me.
My whole life seems to be a venture in contrarianism.
Linkadge
Posted by Twinleaf on May 5, 2012, at 12:14:59
In reply to Re: TMS and the hemispheres, posted by linkadge on May 5, 2012, at 8:32:29
I think that makes you quite unique. I only know one left- hander with no arch; he is quite creative and original in his ways of thinking and feeling, but is also delightful, and very easy to connect with once you start to appreciate what he's like.
It would be very interesting to know whether your language is in your right hemisphere.
Posted by papillon2 on May 6, 2012, at 22:58:24
In reply to TMS and the hemispheres, posted by Twinleaf on May 4, 2012, at 19:52:20
What scares me, is that when my doctors were talking about ECT, it was all about right-unilateral treatment and I asked, "Do you need to do an fMRI or something as I am left-handed, wouldn't that affect which side of the brain to target?". "It's the same for most people" was the reply. MOST PEOPLE? You want to run electricity through my brain despite not knowing if you're hitting the right target? No thank you!
Posted by Twinleaf on May 7, 2012, at 10:19:46
In reply to Re: TMS and the hemispheres, posted by papillon2 on May 6, 2012, at 22:58:24
I think I'll try to find a way to have an fMRI. As a lefty and someone who relies on TMS for maintenanence, I need to be sure the proper hemisphere is beng treated!. I 'd also like to look into low- frequency suppressive TMS treatment for the hemisphere carrying the withdrawal feelings.
Posted by SLS on May 8, 2012, at 3:35:08
In reply to Re: TMS and the hemispheres, posted by Twinleaf on May 7, 2012, at 10:19:46
> I think I'll try to find a way to have an fMRI. As a lefty and someone who relies on TMS for maintenanence, I need to be sure the proper hemisphere is beng treated!. I 'd also like to look into low- frequency suppressive TMS treatment for the hemisphere carrying the withdrawal feelings.
Wow. If that's your own idea, you should publish.
This is fascinating stuff, but I am pretty much clueless. I take it fMRI can determine hemispheric dominance?
- Scott
Posted by Twinleaf on May 8, 2012, at 10:56:03
In reply to Re: TMS and the hemispheres, posted by SLS on May 8, 2012, at 3:35:08
I'm sure there are ways with an fMRI to determine language dominance, although I'm not familiar with them. With the approach and withdrawal feelings, a brief video depicting an emotion ( joy, fear, etc) is presented so that one visual field takes it in slightly before the other. The reaction times and amount of lighting up on the fMRI can tell you which hemisphere is processing a given emotion first. The differences are quite small, as information gets spread all over very rapidly.
I wonder if I'll be able to find someone willing to do this. My pdoc loves new things, so I'm going to ask him to do it.
This is the end of the thread.
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