> (theta rhythm for most animals that do dream).
> Theta [4-8] is the frequency of Type II/III sleep. These are not essential
> types, as defined by which ones the brain tries to catch up on. [They
> are useful when doing calculations both accurately and quickly....]
> The criticals are Type IV and REM.
For humans, yes. But that is why I said theta for *most* animals, since
dolphins was the subject of discussion.