Whatup,
I agree with the Cat, but it does depend to some extent on where you are rotating. The bigger academic programs that have a ton of patients on-service may be looking for more scut-related expertise from the senior students. Basically, the more you bust your ass, the better you'll do and appear.
On the other hand, at a smaller program that has less patients (like the one I'm on now), the residents don't really expect any scut from the students. (Of course, a HUGE reason for this is the PA's that are on the floor all day.) Basically, the team rounds together ONCE, and the rest of the day is spent in conference and the OR. But anyway, it's almost harder at times, because you really have to work at looking busy and not just standing there or getting in the way during rounds. Here though, the residents are a ton more interested in seeing if you'll be a fit in there group. This seems more important at a smaller program, because there's less residents and usually a closer knit bunch.
Regardless, know the anatomy for the basic approaches you'll see. 95% of pimping is anatomy related. Classifications of fractures, etc. aren't a necessity, but of course they make you look good. :pimp: