No motion blur or depth of field in Dead Space...

Just playing through this game again, I'm noticing in the graphics options, even though depth of field and motion blur are available and active, they don't do anything. Anyone know what gives? :?

It's like they just stuck the options there so they could tick of features but forgot to impliment em...

I played it a loooong time ago and I'm pretty sure there was motion blur (becuase some parts of the game stood out becuase of it). It probably just isn't as noticable as in other games.