I did Google and found a source contradicting your claim, as well as nothing supporting it.
As I've explained, I bring those up as examples that the sleep system is not 100% reliable, so I think it's a mistake to go from the general case of "most motor control is shut down during REM sleep" to "nobody in any species ever twitches during a dream".
Given the ad hominems and the repeated misunderstanding of what seemed like a simple request to me, I don't see a lot of value in trying to explain my question to you yet again.
I know someone who sleepwalks their dreams. People are demanding sources because you are claiming "always" when the reality is almost certainly just "usually."
I'm talking about general cases, not disorders. Sleeping walking doesnt occur durring rem, Google it. there's other disorders that allow for movement durring rem. What does disorders have to do with anything?
This suggests that all mammals brain work simmiliar and are paralyzed durring rem.
I'm not sure why your bringing up sleepwalking and night terrors, those don't occur durring rem, so it had nothing to do with paralysis disfunctioning
And I'm not even sure what point your getting at with your comments? Just demanding sources. I feel like you can Google these things your self