Yes I do think it was the attempt that I made to learn to play left handed. I am right handed, and this description will be from that perspective.
I had been playing a stringed music instrument, a right hand5 string banjo, for just over 20 years. When I first picked up a left hand banjo, it was like a completely different instrument. Nothing seemed familiar, and it was like starting all over again. But I was persistent and just stuck with it.
Almost from the beginning, I was aware that something SEEMED to be a little different. But I couldn't quite pinpoint what it was. It would be akin to having a backpack, with a hundred 1 pound weights. If you remove one weight every 2 or 3 days, after a couple of weeks it might become just a little bit noticeable.
The learning of a stringed instrument does not come in a moments time. If you practice every day, your brain starts to rewire itself, slowly over time, to accomodate itself to the new things you are asking it to do. New neuronal pathways will form, new synaptic connections will emerge, gross motor skills and fine motor skills will become fine tuned in order to accomodate this new thing you are trying to do. In addition, some old connections will be disconnected in this process.
We already accept as fact, the brain is not static. However, I believe, we tend to automatically think of our brain in terms of it’s left brain activities, as though our brain is this one organ sitting up there in the middle of our head. It is also my belief, most of what we do in the course of our daily lives, is left brain oriented. We don't actively do things that work our right brain to the same extent.
By not actively using our right brain, maybe it just collects memories over the course of our lives in a happenstance, nonstructured manner. Rememer how memory is stored in our brains? It is in the form of neurons and synaptic connections. But they are not constant, each and every day, new connections are formed, and old ones are dissipated. What happened in my case indicates this can happen in our right brain, as well as our left brain. But there is more.
Dr Roerich brought some very interesting information in another thread. He made the point our right brain processes information twice as fast as our left brain. In addition, right and left brain do not always seem to function together in a symbiotic mode.
There has been research with documented results showing a lack of hemispherical lateralization in people who have PTSD.
It is my belief there are at least 2 major mechanisms involved with what I experienced.
1 – When I picked up a left handed instrument, and practiced daily, I was forming new synaptic connections, and also old connections were being disconnected, and that this was occurring in the right hemisphere. After roughly 3 months of doing this, I realized I was not having the flashbacks, nightmares, jumping out my skin at sudden noises, and my mind felt clear. That was when I told my wife I did not think I had PTSD. To date, 4 years later, I have not had ANY of these PTSD symptoms.
But then something else started.
2 – I had been playing a right handed instrument for 20 plus years, so there was already significant accommodation and "wiring" in the left hemisphere, for this activity. By providing the right brain with some commonality that the left brain already possessed, a HUGE process unfolded that lasted for about a year.
In the mornings when I would wake up, there was a process that would occur. I could feel it, and was consciously aware of it. I did not know what it was, and I knew I was in uncharted waters, but I just went with it and let it happen. You can literally feel a balancing effect taking place. It would last for about an hour, and it was peacefull and serene. I consider and believe it was a mechanism by which the brain balances and heals itself.
I have tried to find a name for this, but to date, have been unable to do so.
I believe, if you have PTSD, it is because at the present you are wired that way. But you are not stuck with it.