@mw2530. This is why! This is exactly why I get annoyed with talking about special interest with NT's! The comments above are engaging, curious, showing comprehension, further investigating the topic. If I raised a special interest topic like this with NTs (which I have), they respond with "oh that's interesting" or "yes I saw a spider in my bedroom and wanted to run". No. No no no, I want to yell at them, THIS ISN'T ABOUT YOU, think about what I've said! Give me something to think about, be interesting! So as a consequence I never talk about anything much with NTs.
However, in the aspie world, people ask interesting questions. I get the impression that aspies are alive, interesting and 'get it'.
What did it (freeze) evolve for?
One theory is that playing dead would fool a predator into letting you go. This sounds plausible but slightly flawed, in that if I was the predator and my prey froze, I would simply go ahead and chow down. And of course, this won't be of much use to the hedgehog...
The idea behind fight, flight, freeze (polyvagal theory) is that in the face of an immediate threat, the amygdala sends a signal to the vagus nerve and signals PANIC, fight or flight. But if neither is possible (say prolonged abuse), the older branch of the vagus nerve is triggered and a freeze response cascades through the nervous system (involuntary). Then, if the danger passes, the body comes back up, through fight or flight to normal. One observation in psychology is that when people have shutdown or withdrawn, they need to come out of it through fight or flight and so anger and fear signifies progress.
Polyvagal Theory, Fight, Freeze or Engage
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The vagus nerve has two branches – dorsal and ventral. The dorsal branch is older branch and in case of fear or danger immobilizes a person (freeze) i.e. faint or act dead. Ventral branch is recent in evolutionary history as is found in mammals. The function of ventral branch is to put a brake on fight and flight response and make person feel calm and safe and indulge in social communication.
@mw2530, so have you ever talked to anyone about a special interest and actually had a decent response? Is it the science that fascinates you or the progress and improvement?