Stopped reading right there. That's bull.
A long-long time ago --- I used to pitch softball and during one game, I had a hard-hit line drive right back at my face. I caught the ball with no problem and even doubled the guy off first who had broken for second when the batter swung. I didn't think anything of it at the time.
But that night, this was only a few weeks after I got married, I had a 'flashback dream', where that ball was coming right at my face and I reacted by thrashing my "glove hand" and ended up smacking my sleeping wife right in the face. We both woke up and my bride wondered what the hell hit her and as I tried to explain, --- well, it just made it worse. ;~))
Yes, you can move during dreams.
Yep had a nightmare once after reading a Stephen King book. Woke up standing on my bed like I was running in place. So if you can't move while your dreaming, I want to know who came in my room and stood me upright while I was in this dream state. LOl woke up in bootcamp one time sitting in bed shining my boots in the dark.
No, I think the writer was not clear. I think he meant that during sleep paralysis the brain turns off the body's ability to move. It is well know that people can move while dreaming. I do it, my wife does it, my dog does it, and probably most people do it. Sleepwalkers do it.
But having had about 5-6 episodes of sleep paralysis, it is true that you are imobile. The first time I had it I was very young and remember being scared to death. Later ones were just a bit scary, but no horror stories. It usually happens when I sleep on my back, which is rarely. But if you feel paralysis, they say to just concentrate on moving a toe or finger rather than your arms or legs. As soon as that connection is made, click, the rest quickly snap on.
And you eventually realize that these things are harmless, which makes it an intellectual project rather than emotional.
Also, it is not the same thing as sleeping on your arm and having it 'fall asleep.' This is the whole body, and there is no tingling as it comes back. It is instant, at least for me, but the several second delay is a bit scary.