"Decussation" ; is the crossing over of the spinal cord in the medulla oblongata that happens in invertebrates. Somewhere in our evolutionary past, the nervous system did a "somatic twist" where the hemispheres of the brain flip flopped, the motor and sensory neurons of one side control the other side of the body and visa versa..
My dear friend Bhavani who is practicing the online program This Next Breath asked a very good question: she heard from neuroscientists that the nervous system doesn't always cross over right hemisphere of the cerebral cortex to left side of the body and visa versa. What did I know about this topic? I know a little bit and it is relevant to share here.
Dr James Austin who wrote "Zen and the Brain" has found in cadaver studies that there is huge human variation when it comes to the decussation of the nervous system in the brain stem. Paul Grilley. The crossing over of the fibers can be as high as 80% and as low as 20%, and everyone is different. So much of the left and right hemisphere discussion must be held with this understanding that humans vary considerably.
When we are practicing Anuloma Viloma, the most important yoga technique ever discovered, one will eventually awaken to the profound differences between the left and right sides of the body and the mind states and personalities they engender. Very few people really get this, or practice this in the way AV was meant to be.
I am deep into developing the Advanced Course course and extending This Next Breath into territory that has never been shown, or talked about. This is truly the grace of Swami Kripalu and Gurudev being brought to the world from decades of isolation and seclusion. They had their secrets and with very good reason. I will be teaching the public part that can be taught openly in an online course. And part of my slowness in developing the Advanced Course is because it is still very much happening within my own nervous system and body. I am still very much a student and practitioner in process "never missing a day."
As of today, the Advanced Course will have 30 days of practice with different techniques and themes that you have never seen before. There will be video instruction and audio guided practice. It will be a different format than the first course, because it has to be that way. It is pretty fun.
You should begin now, with This Next Breath, so you are not left behind. Seriously. Get the program now, start soon and you will have the program forever, even if you are too busy now to begin. Seize the day.