In this fantastic interview Stephen Porges talks about his theory. There are many striking points. One in particular regards the role of the modern vagus, the ventral mielinated branch, on the tonus of the middle ear muscles (minute 23). Lack of tonus can occur as consequence of a stroke, and one of the consequences can be tinnitus and the hypersensitivity to certain sound frequencies. Such hypersensitivity is also common in autistic children and it can be a response to reduced tonus in the middle ear muscles, due to a bad regulation of the vagus. This dysregulation could result from the lack of normal response to other humans, whose origin is still unknown and maybe due to an anomaly in the mirror neurons, that can generate a continuous feeling of insecurity.
I think that this could be one of the first experimental evidence providing support to the work of Alfred Tomatis and Guy Berard. Tomatis and Berard theory are looked as unproven in the best case by the medical establishment, even if there are reported miracles by parents of autistic children, and as scam in other cases. Surprisingly placebo effects in surgical knee operation at reducing pain and other symptoms in patients suffering from torn knee cartilage do not prevent to continue to intervene in these cases. Not to mention other operations as tendon lengthening, still performed in palsy children to “improve mobility”, without considering addressing the impulse to shorten the muscles coming from the brain that can make the initial relieve provided by the surgery useless after a short time.
Using Feldenkrais affects the tonus of the muscular systems in many ways, it would be nice to directly measure the tonus of the stapedius after and before a session, certainly we can see changes in the visible tone of the facial muscles.