I read a book, just a few weeks ago regarding this specific topic and my explanaition is directly from that book. We do have specific brain areas for this. Thi

I read a book, just a few weeks ago regarding this specific topic and my explanaition is directly from that book. We do have specific brain areas for this. This sudden jerk you can read about it here: https://en.wikipedia.org/wiki/Hypnic_jerk https://en.wikipedia.org/wiki/Hypnic_jerk and its not scienctificly clear why and how it works, the best assumption is that its a reflex. You are not disconnecting your brain from anything.