I have an iMac running OSX 10.8.4.
I've tried this on emacs built from Homebrew, as well as a version I've downloaded from http://emacsformacosx.com/
I've tried this with a completely clean
What happens when I go
C-h k then type ctrl-up arrow, is I get a explanation that " runs the command backward-paragraph" and so on. The same thing with ctrl-down arrow.
When I try ctrl-right arrow, or ctr-left arrow, nothing happens.
If I go
C-h b I see that they keys are bound:
But nothing happens.
I'm running the standard, flat, mac keyboard with a cord.