forelimbs

[B.Dol@skn.sc.philips.com]

I have a question. Last night I was thinking about theropods and I 
wondered about the forelimbs. Very small indeed in some species. What 
I would like to know is the following:
Do these forelimbs have restrictions in movement? Could they be 
swayed out sideways or only forwards/backwards? If there were 
restrictions then: did some species suffer (i.e smaller and/or 
larger) more restrictions than others or did this decrease come with 
time?

Hopefully somebody would like to take the time to answer these 
questions. I am not looking for a complete description of every 
species; a general covering of the issue (if possible) will do.

Thanks in advance,